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1
Vijayakumaran, M., and E. V. Radhakrishnan. "Live transport and marketing of spiny lobsters in India." Marine and Freshwater Research 48, no. 8 (1997): 823. http://dx.doi.org/10.1071/mf97084.
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Eight species of spiny lobster (six littoral and two deep-sea) and two species of slipper lobster constitute the lobster fishery of India. Lobster landings fluctuate around 2000–3000 t annually. High export demand for Indian spiny lobsters has resulted in regular and organized exploitation, both inshore and offshore. Almost the entire quantity of lobsters landed in India is exported in frozen, cooked or live form. Export of live lobsters, which realize the maximum unit price, has increased from 22 t in 1994 to 97 t in 1996. Live transport of spiny lobsters has advanced from just keeping them alive for a few hours in moist intertidal beach sand to the most sophisticated packing in insulated boxes. The process involves holding the lobsters at the landing centre and at the city of export. The entire exercise lasts about seven days, during which period the lobsters are packed twice, each time keeping them out of water for not less than 20 h. In the holding centres, the lobsters are often kept at high densities, with the resulting build-up of nitrogenous wastes and depletion of dissolved oxygen leading to mortalities. Average mortality is up to 6.5% during live transport.
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Muzammil, Wahyu, and Bambang Kurniadi. "Carapace length-frequency distribution and carapace length-weight correlation of ornate spiny lobster (Panulirus ornatus) in Sebatik Island Waters – Indonesia." E3S Web of Conferences 324 (2021): 03009. http://dx.doi.org/10.1051/e3sconf/202132403009.
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Ornate spiny lobster (Panulirus ornatus) in Sebatik Island is a commercial fisheries commodity that has the highest price if we compare it with another lobster caught by the fisherman in Sebatik Island Waters. That causes the effort to catch this lobster to increase continuously. The availability of biological aspects data of ornate spiny lobster is needed as a basis for sustainable lobster resource management in Sebatik Island. This research aims to analyze the biological performance of ornate spiny lobster in Sebatik Waters, coverage from study carapace length-frequency distribution and carapace length-weight correlation of ornate spiny lobster. This research is expected to provide benefits as basic information in lobster management. Information related to the biological condition of lobsters can be used as a consideration in strategies for the utilization and management of lobster resources. Measurement of carapace length, weight, and sex of ornate spiny lobster was carried out from April to August 2016 at lobster landing base in Sebatik Island, North Borneo, Indonesia. The results showed that the sex ratio shows an unstable ratio. The distribution catch size of ornate spiny lobsters ranged from 64.5–114.5 mmCL. The growth pattern of female and male ornate spiny lobsters was negative allometric with r and R2 values of both female and male >0.95. Carapace length at first ornate spiny lobster catch was 71.28 mmCL.
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Rivaie, Arief Rahman, Yudha Trinoegraha Adiputra, Agus Setyawan, and Dwi Handoko Putro. "Effect of different diets on growth performance, physiological response and behavior of spiny lobster Panulirus homarus (Linnaeus, 1758)." Jurnal Kelautan Tropis 26, no. 2 (May 8, 2023): 301–14. http://dx.doi.org/10.14710/jkt.v26i2.17656.
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This study aimed to know the effect of different feedings on growth performance, physiological responses, and behavioral changes of juvenile spiny lobsters. The experimental method used a completely randomized design with three treatments and four replications. There were three different feeds used as treatment, namely: flesh mussel (K), commercial fish feed (I), and commercial shrimp feed (U). Feed is given as much as 30% of body weight, five times per day at 6:30 am, 12:00 pm, 4:00 pm, 9:00 pm, and 2:00 am. The results showed that the commercial feeding of fish (I) significantly (P<0.05) increased the survival rate and biomass of spiny lobster for 54.17% and 141.7 g, respectively. While fresh mussel give better growth and stress response, but had the lowest survival rate. The results of the physiological response test of lobster were more effective in suppressing lobster stress levels than other treatments (P<0.05). The behavior of juvenile spiny lobsters showed a very striking color difference and reflex impairment scores, which indicated that the vitality of the treated juveniles (I) was better than the vitality of the treatments (K) and treatment (U). This study shows that commercial fish feed (I) is recommended for maintaining spiny lobsters in the juvenile phase, although it needs further maintenance by using an appropriate feed formulation to improve the growth performance of spiny lobsters.
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Cruz, Raul, Marina T. Torres, João V. M. Santana, and Israel H. A. Cintra. "Lobster Distribution and Biodiversity on the Continental Shelf of Brazil: A Review." Diversity 13, no. 11 (October 20, 2021): 507. http://dx.doi.org/10.3390/d13110507.
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The continental shelf of Brazil is home to a wide range of lobster species, with varying body size, color, habitat preference, and geographic and bathymetric distribution. Spiny lobsters (Panulirus) and slipper lobsters (Scyllaridae) are exploited for export and for the domestic market. Deep sea lobsters (Nephropidae and Polychelidae) have no commercial potential, and little is known about their biology. In this review, we identified 24 lobster species from benthic ecosystems off Brazil (Palinuridae 25%, Scyllaridae 29%, Nephropidae 25%, Polychelidae 17%, Enoplometopidae 4%). We designed a simplified theoretical scheme to understand the role of lobsters in the ecosystem, based on available evidence of distribution, biodiversity, life cycle, connectivity, and abundance. Finally, we propose a theoretical scheme of trophic top-down control, with interactions between a large decapod (spiny lobster), a demersal predator (red snapper), an apex predator (small tuna), benthic invertebrates and fishing exploitation.
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Derby, Charles D., Pascal Steullet, Amy J. Horner, and Holly S. Cate. "The sensory basis of feeding behaviour in the Caribbean spiny lobster, Panulirus argus." Marine and Freshwater Research 52, no. 8 (2001): 1339. http://dx.doi.org/10.1071/mf01099.
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A complex nervous system enables spiny lobsters to have a rich behavioural repertoire. The present paper discusses the ways in which the sensory systems of the Caribbean spiny lobster, Panulirus argus, particularly its chemosensory systems, are involved in feeding behaviour. It addresses the neural mechanisms of three aspects of their food-finding ability: detection, identification, and discrimination of natural food odours; the effect of learning on responses to food odours; the mechanisms by which spiny lobsters orient to odours from a distance under natural flow conditions. It demonstrates that the olfactory organ of spiny lobsters might use acrossneuron response patterns in discriminating odour quality; that the hedonic value of food can be modified by experience, including associative and nonassociative conditioning; that spiny lobsters can readily orient to distant odour sources; and that both chemo- and mechanosensory antennular input are important in this behaviour. Either aesthetasc or nonaesthetasc chemosensory pathways can be used in identifying odour quality, mediating learned behaviours, and permitting orientation to the source of distant odours. Studying the neuroethology of feeding behaviour helps us understand how spiny lobsters are adapted to living in complex and variable environments.
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Bertelsen, Rodney D., and Thomas R. Matthews. "Fecundity dynamics of female spiny lobster (Panulirus argus) in a south Florida fishery and Dry Tortugas National Park lobster sanctuary." Marine and Freshwater Research 52, no. 8 (2001): 1559. http://dx.doi.org/10.1071/mf01214.
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Using diver surveys, we compared the size structure, fecundity, and reproductive season of spiny lobsters (Panulirus argus) in the Dry Tortugas National Park lobster sanctuary with those of spiny lobsters in the south Florida fishery. The number of lobsters of both sexes larger than the legal size limit declined sharply in the fishery but not in the sanctuary. Clutch sizes were larger in the Dry Tortugas sanctuary, averaging 0.8 million, than in the fishery, averaging 0.3 million. The reproductive season was shorter and more intense in the sanctuary than in the fishery. In addition, lobsters in the sanctuary begin producing eggs at a larger size and produce more eggs per gram of body mass than lobsters in the fishery. Peak egg production occurs earlier in larger lobsters than in small ones. Establishing a fundamental reason for the differences between lobster reproduction in the sanctuary and that in the fishery is not possible until the chronological age of lobsters can be determined, but one hypothesis consistent with these differences is that, if lobsters reproduce at a certain chronological age, then sublethal fishery practices may account for slower growth for some lobsters resulting in some smaller but older reproductively active lobsters.
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Giacalone, Vincenzo M., Arturo Zenone, Fabio Badalamenti, Javier Ciancio, Gaspare Buffa, Michele Gristina, Carlo Pipitone, and Giovanni D’Anna. "Homing and home range of the European spiny lobster, Palinurus elephas (Decapoda, Palinuridae) acoustically tracked." Crustaceana 92, no. 4 (April 1, 2019): 463–76. http://dx.doi.org/10.1163/15685403-00003893.
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Abstract A specific study has been carried out for the first time to investigate the homing capability and daily home range of the spiny lobster Palinurus elephas by means of ultrasonic telemetry. Nine lobsters collected in the Capo Gallo — Isola delle Femmine marine protected area (northwestern Sicily, central Mediterranean) were tagged with miniaturized transmitters and released at a single site inside the protected area. The lobsters were monitored with the purpose of calculating their horizontal and vertical positions, analysing their movement patterns to assess their homing capability, and calculating their daily home range. Five lobsters moved back close to the capture sites within the first 20 hours after release (‘homed’). The remaining four lobsters ‘relocated’ to a different refuge. Homed lobsters had a larger home range than relocated lobsters. This study provides the first description of a homing pattern with high spatial resolution in the wild European spiny lobster as inferred by ultrasonic telemetry.
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Sudewi, Sudewi, Zeny Widiastuti, Bejo Slamet, and Ketut Mahardika. "EXPERIMENTAL INFECTIONS OF MILKY HEMOLYMPH DISEASE IN SPINY LOBSTER Panulirus homarus." Indonesian Aquaculture Journal 13, no. 1 (August 10, 2018): 31. http://dx.doi.org/10.15578/iaj.13.1.2018.31-40.
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Milky hemolymph disease of spiny lobster (MHD-SL) is categorized as the most destructive disease in farming spiny lobster. Therefore, it is required to investigate the routes of milky disease infection in spiny lobster as a basic knowledge in order to prevent milky disease transmission. The aim of the present study was to perform an experimental infection of milky disease in spiny lobster Panulirus homarus. Experimental infection of milky disease was carried out by several modes of infection which were injection, immersion and per os exposure. Injection of each 0.2 mL undiluted and diluted hemolymph from the diseased lobster resulted in a cumulative mortality of 100% at 15 days post-infection (dpi), and 75% at 16 dpi, respectively. Experimental infection through water immersion caused in a cumulative mortality of 50% at 7 dpi. In contrast, no mortality was observed in per os exposure as well as in control groups. Results of this experimental study provided evidence for horizontal transmission of MHD-SL among P. homarus. Histopathological analysis exhibited that there were masses of Rickettsia-like bacteria (RLB) in the connective tissues of the gill, hepatopancreas, gonad, midgut, and muscle tissues of the affected lobsters. Mass of RLB was not only found in the moribund lobsters but also in the surviving lobsters with milky hemolymph appearance.
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Adiyana, Kukuh, Riza Zulkarnain, and Lolita Thesiana. "Physiological response and growth performance of spiny lobster (Panulirus homarus) juvenile rearing in recirculating aquaculture system with various shelter type." Marine Research in Indonesia 45, no. 2 (December 31, 2020): 67–74. http://dx.doi.org/10.14203/mri.v45i2.285.
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Spiny lobster nursery is done to produce more adaptive and uniform juvenile lobsters quality. Shelters used in spiny lobster nursery served to reduce physical contact among lobsters in the rearing tank. The purpose of this study was to analyze the effect of different shelter types on physiological response and growth of spiny lobster (Panulirus homarus) juvenile rearing in recirculating aquaculture systems. Lobsters with an average weight of 50.07 ± 2.89 g were reared for 60 days. They were fed once a day with trash fish. The daily feeding rate was 3-4% of total weight. This study used four types of shelter as treatments with two replications. PVC pipe shelter as control (K), individual shelter square shaped (IS ■), individual shelter triangle shaped (IS ▲), and individual shelter tube shaped (IS ●). The weight and length of the lobster carapace improved with the duration of the research in all treatments. Throughout the trial, glucose levels in controls were generally greater than those in specific shelf treatments. The reaction of lobster hemolymph total protein to different shelters is highly variable. Overall, the usage of individual shelters had a considerable positive influence on grown lobsters in this study. This is because individual shelter eliminates contact between lobsters, eliminating the possibility of cannibalism in the cultivation container. This study concludes that IS ■ used in rearing Panulirus homarus showed a lower stress response than the other treatments in terms of glucose and total protein lobster hemolymph during the study. IS ■ is the best because it reduced stress levels and yielded better total biomass among the other treatments.
10
Salazar, Ivo S. Orellana, and Raúl Cruz. "Age and growth of the commercial spiny lobsters Panulirus argus (Latreille, 1804) and Panulirus laevicauda (Latreille, 1817) (Decapoda, Palinuridae) in Northeast Brazil: a review." Crustaceana 92, no. 7 (July 26, 2019): 767–88. http://dx.doi.org/10.1163/15685403-00003906.
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Abstract The two spiny lobster fisheries targeting Panulirus argus (Latreille, 1804) and Panulirus laevicauda (Latreille, 1817) have made an important marine resource in Northeast Brazil since 1955. The Von Bertalanffy age and growth parameters of the spiny lobster started being studied in 1960 and the last assessment was performed over 20 years ago. The objective of this review is to analyse the type of input data and the methods historically used to assess age and growth of the spiny lobster stock in Northeast Brazil. Our study reviews and updates the research on the subject and proposes relative values for the Von Bertalanffy growth parameters for P. argus and P. laevicauda as provisional reference. We recommend further age and growth research on spiny lobsters to create a new and updated growth function for commercial lobsters in Northeast Brazil.
11
Lee, Soxi, Neil D. Hartstein, and Andrew Jeffs. "Modelling carbon deposition and dissolved nitrogen discharge from sea cage aquaculture of tropical spiny lobster." ICES Journal of Marine Science 72, suppl_1 (November 20, 2014): i260—i275. http://dx.doi.org/10.1093/icesjms/fsu189.
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Abstract The tropical spiny lobster, Panulirus ornatus, is farmed in floating sea cages situated in shallow coastal waters in many parts of the Asia-Pacific region. Despite the rapid expansion of this aquaculture activity, very little is known about its environmental impacts. This study combines computer modelling with previous laboratory measures to provide information on benthic carbon deposition and the production of dissolved inorganic nitrogen (DIN) from hypothetical sea cage aquaculture of spiny lobsters. Modelling scenarios were run with two different lobster aquaculture stocking densities (3 and 5 kg m−3) and various feed conversion ratios (FCRs) using natural seafood or artificial lobster diet (FCR 1.28–28). Simulations from the model showed that cumulative benthic carbon deposition varied from 0.1 to over 0.8 kg C m−2 year−1, while the mean DIN levels around sea cages ranged from 5.6 up to 25 µg N l−1 and the maximum DIN levels ranged from 10.8 to 165 µg N l−1. The results showed that feeding lobsters with seafood resulted in a markedly higher benthic carbon loading and release of DIN when compared with artificial lobster feed. Therefore, the elimination of the use of trash fish would greatly reduce the environmental impacts of spiny lobster aquaculture. Overall, the effects from spiny lobster aquaculture were spatially localized with the highest concentrations of carbon deposition and DIN directly beneath the sea cages. Therefore, it seems unlikely that spiny lobster aquaculture in sea cages will cause adverse environmental effects unless the lobsters are heavily stocked and supplied with poor quality feed.
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Behringer, Donald C., Mark J. Butler, Jessica Moss, and Jeffrey D. Shields. "PaV1 infection in the Florida spiny lobster (Panulirus argus) fishery and its effects on trap function and disease transmission." Canadian Journal of Fisheries and Aquatic Sciences 69, no. 1 (January 2012): 136–44. http://dx.doi.org/10.1139/f2011-146.
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The Caribbean spiny lobster (Panulirus argus) supports the most economically valuable fishery in the Caribbean. In Florida, USA, the majority of the catch is landed in traps “baited” with live, sublegal-sized lobsters that attract other lobsters due to their social nature. This species is also commonly infected by the pathogenic virus Panulirus argus Virus 1 (PaV1). Here we describe a polymerase chain reaction (PCR) based assessment of the prevalence of PaV1 in the lobster fishery from the Florida Keys. We tested the effect of PaV1-infected lobsters in traps on catch and on transmission to other trapped, uninfected lobsters. We found that 11% of the lobsters caught in commercial traps were positive for the virus by PCR, but none of these animals showed visible signs of disease. We also tested whether healthy lobsters avoid diseased lobsters in traps. Traps into which we introduced an infected lobster caught significantly fewer lobsters than traps containing an uninfected lobster. Moreover, uninfected lobsters confined in traps with infected lobsters acquired significantly more PaV1 infections than those confined with uninfected lobsters. This study demonstrates the indirect effects that pathogens can have on fisheries and the unintended consequences of certain fishery practices on the epidemiology of a marine pathogen.
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Wibowo, R. H., Sipriyadi, W. Darwis, N. Susianti, S. P. Yudha, and N. Rosianti. "Identification of Vibrio spp. causing vibriosis in spiny lobsters (Panulirus homarus L.) in Bengkulu marine temporary shelter ponds." IOP Conference Series: Earth and Environmental Science 869, no. 1 (November 1, 2021): 012019. http://dx.doi.org/10.1088/1755-1315/869/1/012019.
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Abstract Spiny lobster (Panulirus homarus) is one of the export commodities of the Indonesian fisheries subsector and an important component for shrimp fisheries in Indonesia. In the development of lobster cultivation, there are several obstacles, the presence of vibriosis infection caused by the pathogenic Vibrio bacteria. This study aimed to identify Vibrio spp. bacteria in spiny lobsters (P. homarus) reared in the marine cultivation ponds, Bengkulu, Indonesia. Clinical symptoms of lobsters infected with vibriosis are red spots on the uropod, pleopod, and abdominal parts. Bacterial isolation was conducted by isolated some internal organs in spiny lobsters, that are, gills, stomachs, haemolymph, and hepatopancreas. The result showed there are 5 isolates of Vibrio bacteria that coded by IN3, ST2, HA1, HP2, and HP3. These bacteria isolates were identified through their colony morphology and biochemical tests. Characterization on the Thiosulfate Citrate Bile Salt Sucrose (TCBS) medium showed that lobsters were infected with Vibrio species. Based on Bergey’s Manual of Determinative Bacteriology, Austin and Austin, the identification results showed that HA1 isolate was identified as Vibrio algynolyticus, IN3 isolate was identified as V. anguillarum, ST2 was identified as V. ordalii, HP2 in first lobster was identified as with V. algynolyticus that mostly in the hepatopancreas, and HP3 was identified as V. splendidus
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Lohmann, K., N. Pentcheff, G. Nevitt, G. Stetten, R. Zimmer-Faust, H. Jarrard, and L. Boles. "Magnetic orientation of spiny lobsters in the ocean: experiments with undersea coil systems." Journal of Experimental Biology 198, no. 10 (October 1, 1995): 2041–48. http://dx.doi.org/10.1242/jeb.198.10.2041.
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The western Atlantic spiny lobster Panulirus argus undergoes an annual migration and is also capable of homing to specific dens in its coral reef environment. Relatively little is known, however, about the orientation cues that lobsters use to guide their movements. To determine whether lobsters can orient to the earth's magnetic field, divers monitored the orientation of lobsters tethered inside magnetic coil systems submerged offshore in the Florida Keys, USA. Each coil could be used to reverse either the horizontal or vertical component of the earth's field. Tethered lobsters walking inside the coils often established and maintained consistent courses towards specific directions. After a lobster had established a course, it was exposed to one of three conditions: (1) a reversal of the horizontal component of the earth's field; (2) a reversal of the vertical component of the earth's field; or (3) no change in the ambient field (controls). Lobsters subjected to the horizontal field reversal deviated significantly from their initial courses. In contrast, control lobsters and those subjected to the reversed vertical field did not. These results demonstrate that spiny lobsters possess a magnetic compass sense. Because inverting the vertical component of the earth's field had no effect on orientation, the results suggest that the lobster compass is based on field polarity and thus differs from the inclination compasses of birds and sea turtles. The magnetic compass of lobsters may function in homing behavior, in guiding the autumn migration or in both.
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Frisch, Ashley J. "Social organisation and den utilisation of painted spiny lobster (Panulirus versicolor) on a coral reef at Northwest Island, Australia." Marine and Freshwater Research 59, no. 6 (2008): 521. http://dx.doi.org/10.1071/mf06110.
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The social ecology of spiny lobsters (Palinuridae) is poorly known but important for understanding their evolution and interpreting the behavioural basis of their catchability. Visual surveys of 60 ha of coral reef at North-west Island revealed 34 shelters (dens) occupied by painted spiny lobster (Panulirus versicolor). Eighty-five lobsters were tagged with highly visible external tags and moult-resistant internal tags. Most dens contained only a single lobster, but the distribution of lobsters was aggregated; most lobsters occurred in groups of 2–7 individuals. Daily visits to each den revealed that lobsters moved frequently to and from nearby dens and the composition of groups changed often. However, groups were not random mixtures of individuals since two male lobsters never occupied the same den simultaneously. Surprisingly, there was no significant relationship between body size and male social status (number of co-habiting females). Experimental translocation of single male and female lobsters to occupied dens did not result in eviction, regardless of body size, indicating that subtle mechanisms drive this social system. Most lobsters congregated in the same 10–15 dens. This renders P. versicolor easy to find and vulnerable to over-exploitation, but suggests that marine reserves may be useful for protecting this highly sought-after species.
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Harrington, Amalia M., and Kevin A. Hovel. "Patterns of shelter use and their effects on the relative survival of subadult California spiny lobster (Panulirus interruptus)." Marine and Freshwater Research 67, no. 8 (2016): 1153. http://dx.doi.org/10.1071/mf14351.
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Spiny lobsters use refuge habitat and gregarious behaviour to reduce predation risk, particularly in their vulnerable juvenile and subadult stages. We characterised patterns of sheltering behaviour in the California spiny lobster (Panulirus interruptus (Randall)) on southern California rocky reefs and used manipulative experiments to examine how these behaviours affect the survival of subadult lobsters and shelter selection. Lobsters generally were gregarious and subadults were commonly found inhabiting shelters with adult lobsters. Tethering experiments with subadults indicated that communal denning increases the odds of survival only when adult lobsters are part of aggregations. This corresponded to results from a shelter choice experiment in the laboratory, where the presence of predators caused subadults to shelter more often with adult conspecifics rather than other subadults. Despite the gregarious nature of P. interruptus, solitary subadults were common at all sites. Although field experiments clearly indicated that solitary lobsters increased their odds of survival by inhabiting shelters scaled to body size, evidence that lobsters exhibit shelter scaling on natural reefs was mixed. Our results indicate that subadult P. interruptus exhibit similar behavioural strategies as other spiny lobsters to reduce predation risk, and they provide a more comprehensive examination of P. interruptus behaviour than previously available.
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Wijaya, Danu, and Amula Nurfiarini. "PERCOBAAN PENANDAAN LOBSTER PASIR (Panulirus homarus Linnaeus, 1758) DI TELUK PRIGI." Jurnal Penelitian Perikanan Indonesia 24, no. 4 (March 15, 2019): 273. http://dx.doi.org/10.15578/jppi.24.4.2018.273-282.
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Percobaan penebaran lobster pasir (Panulirus homarus) di Perairan Teluk Prigi, Kabupaten Trenggalek dilakukan pada 2015. Percobaan dilakukan dengan cara memberi tanda (tag) pada seluruh sampel lobster pasir yang ditebar, dikenal sebagai metode Capture-mark-recapture (CMR) dan sudah banyak digunakan untuk mempelajari populasi biota di alam. Penelitian bertujuan untuk mengetahui tingkat tertangkap kembali, laju pertumbuhan, dan pergerakan lobster pasir bertanda di Teluk Prigi. Penebaran lobster pasir bertanda dilakukan pada tiga lokasi yaitu Damas, Karanggongso dan Karangasem dengan jumlah 2.784 ekor dan diberi tanda jenis T-bar berwarna merah yang memiliki kode. Pengamatan lobster pasir bertanda yang tertangkap kembali dilakukan sepanjang tahun 2016 di Teluk Prigi (Februari-Desember). Tingkat tertangkap kembali lobster bertanda dihitung menggunakan proporsi antara lobster bertanda yang tertangkap dengan lobster bertanda yang ditebar. Laju pertumbuhan lobster bertanda yang tertangkap kembali dihitung berdasarkan pertumbuhan per satuan waktu yang sama dengan perubahan panjang dibagi dengan perubahan umur. Pergerakan lobster bertanda diukur melalui jarak dari lokasi tebar sampai dengan lokasi lobster bertanda yang tertangkap kembali. Tingkat tertangkap kembali lobster pasir (P. homarus) bertanda di Teluk Prigi sebanyak 4,7 %. Laju pertumbuhan lobster pasir yang tertangkap kembali rata-rata 0,09±0,05 mm/hari. Pergerakan lobster pasir bertanda yang tertangkap kembali di Teluk Prigi berkisar antara 0,1-11,36 km. Pergerakan lobster pasir bertanda memiliki kecenderungan acak dan tetap pada wilayah pantai.In 2015, restocking experiment of Scalloped spiny lobster (Panulirus homarus) was conducted in Gulf of Prigi, Trenggalek Regency and the lobsters were tagged. This methods is known as Capture-mark-recapture (CMR). CMR is widely used to study of biota populations in wild nature. The aims of this study are to determine the recapture rate, growth rate, and movement of tagged scalloped spiny lobster in Prigi Bay.The tagged spiny lobster release was realesed at three locations, namely Damas, Karanggongso and Karangasem with 2,784 lobsters and was tagged with a red T-bar type that has a code. Observations of tagged scalloped spiny lobsters were carried out again throughout 2016 in Prigi Bay (February-December). The recapture rate of tagged spiny lobster is calculated using the proportion between the tagged lobster with the tagged lobster released. The tagged tagged spiny lobster growth rate is calculated again based on growth per unit time which is equal to the change in length divided by the change in age. Tagged spiny lobster movements are measured by distance from the location of release to the location of the tagged tagged spiny lobster is capture again. The recapture rate of tagged spiny lobster (P. homarus) marked in Gulf of Prigi as much as 4.7%. The growth rate of tagged spiny lobster averaged 0.09 ± 0.05 mm/day. The movement of tagged spiny lobster in Gulf of Prigi ranges from 0.1 to 11.36 km. The movement of tagged spiny lobster has a random movement and remains in the coastal region.
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Ooi, Mei C., Andrew J. Trotter, Gregory G. Smith, and Andrew R. Bridle. "Characterisation of the Gut Bacteria of Cultured and Wild Spiny Lobster Panulirus ornatus." Applied Microbiology 3, no. 1 (February 6, 2023): 241–53. http://dx.doi.org/10.3390/applmicrobiol3010016.
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The commercial onshore aquaculture of the spiny lobster Panulirus ornatus, while in its infancy, has progressed rapidly from the enabling research that continues at the University of Tasmania. The development of lobster feeds, both fresh and manufactured, has been critical to the success of this emerging aquaculture sector. Fresh feeds derived from mussel represent the gold standard in terms of the growth performance of juvenile lobsters. Nonetheless, concerns regarding availability, sustainability, and potential biosecurity issues of fresh feeds highlight the importance of developing manufactured feeds for lobster aquaculture. Wild lobsters are assumed to have a balanced natural diet that allows for standard growth and development, and as such natural diets are often used as a reference for feed development. Similarly, the gut microbiota associated with a natural diet is assumed to reflect a healthy microbial assemblage. The aim of this study was to compare the microbiota of the hindgut and hepatopancreas of cultured P. ornatus fed with a commercial prawn pellet or mussel to that of wild spiny lobster juveniles. Gut samples were analysed using Oxford Nanopore 16S rRNA gene sequencing. Based on principal coordinate analysis, the gut bacteria of cultured lobsters were different from the wild juveniles. The core microbiota of the hindgut and hepatopancreas libraries were phyla Proteobacteria (Gamma, Alpha) and Bacteroidetes. Vibrio was the most dominant genus in both organs. The differences in bacterial relative abundance were mainly between cultured (pellet-, mussel-fed) and wild lobsters. In conclusion, bacteria in the cultured lobsters had significantly different profiles to that of the wild juveniles, indicating that current onshore aquaculture practices alter the gut microbiota. A number of different feeding and culture practices may be required if the aim of closed culture practices is to attain a gut microbiota in cultured animals that is representative of that found in wild spiny lobsters.
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Junaidi, Muhammad, Nunik Cokrowati, Nanda Diniarti, and Andre Rachmat Scabra. "Growth and Health Status of Spiny Lobsters and Snubnose Pompano with Multilevel Floating Net Cage System." Asian Journal of Fisheries and Aquatic Research 25, no. 6 (December 23, 2023): 57–66. http://dx.doi.org/10.9734/ajfar/2023/v25i6717.
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The cultivation of multilevel floating net cages (MFNC) systems is believed to be able to increase production capacity without increasing the horizontal area of the cultivation area. Research on the effect of using MFNC on the growth and health performance of Spiny lobsters and Snubnose pompano has never existed, so a study was conducted with the aim of comparing the growth and health performance of spiny lobsters and Snubnose pompano in floating net cage (FNC) and MFNC cultivation systems. The research method used was a field experiment with a comparative analysis of spiny lobsters and Snubnose pompano cultivation with different cultivation systems, namely the MFNC and FNC systems with 3 replications. The rearing lasted for 2 months and was fed trash fish as much as 5% of the biomass every day. Parameters of spiny lobsters and Snubnose pompano growth performance observed included weight growth, carapace length growth, total length growth, and specific growth rate. The health status of spiny lobsters observed quantitatively was the total hemocytes counts and hemolymph glucose levels, and Snubnose pompano by counting erythrocytes and blood leukocytes. The results showed that there was no difference in growth performance, survival and health status of spiny lobsters and Snubnose pompano reared using MFNC and FNC systems based on paired two sample for means, because p value > 0.05 for all growth parameters survival and health status. Thus, the use of a multilevel floating net cage system in lobster cultivation can increase FNC productivity and be efficient in optimal space utilization and does not affect water quality, especially the parameters of temperature, pH, dissolved oxygen and salinity. There were no significant differences in the growth performance, survival, and health status of lobsters and Snubnose pompano when reared using the MFNC and FNC cultivation systems.
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Damora, A., N. Fadli, S. Andriyono, and A. Suman. "The potential of the spiny lobster fishery in Aceh waters: A short review." IOP Conference Series: Earth and Environmental Science 869, no. 1 (November 1, 2021): 012049. http://dx.doi.org/10.1088/1755-1315/869/1/012049.
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Abstract The western-southern and northern coastal waters of Aceh are the potential fishing areas of spiny lobster, which faces the Indian Ocean and the Andaman Sea. Fishing gears that are widely used are lobster gill nets and hand-picking with compressors. In Indonesia, seven species of spiny lobsters are caught in these waters, including Panulirus homarus, P. penicillatus, P. versicolor, P. ornatus, P. polyphagus, P. longipes longipes, and P. longipes femoristiga. The habitat for spiny lobsters is spread from coral reefs, rock, sand, and muddy sand. Panulirus homarus is the most frequently caught species in these waters, followed by P. penicillatus and P. longipes. Panulirus homarus is mainly caught during the dry season (southwest wind) and high waves (May to July), where other lobster species experience a significant decrease in the catch. The stock of spiny lobster in Fisheries Management Area (FMA) 572 (including Aceh coastal waters) has been in an overfishing condition since 2008. Maximum sustainable yield (MSY) of spiny lobster in Aceh coastal waters part of Malacca Strait (FMA 571) is 188.60 tons.yr−1 with a total allowable catch (TAC) of 151.10 tons. yr−1. Furthermore, the MSY for Aceh coastal waters part of Indian Ocean is 292.09 tons.yr−1 with a TAC of 233.92 tons.yr−1. Spiny lobster fishing in Aceh coastal waters must ensure its use in the future, both ecologically, socially, and economically.
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Sudewi, N. W. W. Astuti, Fahrudin, I. N. A. Giri, and B. Slamet. "Growth and survival of spiny lobster, Panulirus homarus fed fresh food and formulated diet." IOP Conference Series: Earth and Environmental Science 890, no. 1 (October 1, 2021): 012036. http://dx.doi.org/10.1088/1755-1315/890/1/012036.
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Abstract To date, lobster aquaculture relies on fresh food for feeding; however, the availability of fresh food is limited and its excessive use causes environmental degradation. Therefore, formulated diet is required to establish sustainable lobster aquaculture. Concerning this issue, this study was carried out to assess the growth and survival of spiny lobster Panulirus homarus fed fresh food and formulated diet. The study was conducted in a completely randomized design (CRD) with 3 groups of treatments and 3 replicates for each treatment. Feeding experiment was performed in a flow-through water system using 9 fibre tanks, 4000 L in volume. Each tank was stocked with 40 lobsters, with initial weight of 78.08 ± 0.22 g. Each group of lobsters was fed with fresh food (A), formulated diet (pellet) (B) and a combination of pellet and fresh food (C). The fresh food was a mixture of fish, crabs, shrimp and small mussel (3:1:1:1). Feeding experiment was done for 15 weeks. Results of the experiment showed that the highest specific growth rate of lobster was obtained from lobsters fed with the combination of pellet and fresh food (0.52 ± 0.02 %/day) and the lowest growth was resulted from lobsters fed formulated diet (0.16 ± 0.03 %/day). In contrast, the highest survival was achieved in lobsters fed formulated diet (51.67%). Whereas the lowest survival was found in lobsters fed fresh food (10%). This study indicated that good growth of lobster was resulted from feeding with formulated diet combined with fresh food, while good survival was supported by feeding with formulated diet.
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Astuti, N. W. W., Sudewi, N. A. Giri, Fahrudin, Y. N. Asih, and B. Slamet. "Fish and shrimp hydrolysate as additives in lobster feed formulation: effect on growth, survival, feed consumption of spiny lobster (Panulirus homarus)." IOP Conference Series: Earth and Environmental Science 1137, no. 1 (January 1, 2023): 012027. http://dx.doi.org/10.1088/1755-1315/1137/1/012027.
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Abstract Artificial feed formulation has been developed to minimize trash fish use in spiny lobster (Panulirus homarus) culture. However, lobster growth was higher when they were fed fresh diets. Low feed intake was considered a problem in artificial feed development. This study aimed to evaluate fish and shrimp hydrolysate as attractants in lobster feed formulation. This research conducted three treatments, i.e., benchmark feed as control (A), feed with 3% fish hydrolysate (B), and feed with 3% shrimp hydrolysate (C). Lobsters with an initial carapace length of 6.12 cm and initial weight of 97.6 g were allocated into fiberglass tanks (2×2×1 m3) with a stocking density of 40 lobsters/tank. Lobsters were fed with moisture pellets with 24%-25% moisture content three times daily. The lobster’s weight and carapace length were measured every four weeks. Twelve weeks of observation showed no significant effects of treatments (p<0.05) on growth, feed consumption, lobster survival, and molt frequency. The final weight of the lobster ranged from 115.81 g to 116.10 g. The final carapace length was around 6.52 cm - 6.55 cm, the specific growth rate was around 0.20 %/day, and feed consumption ranged from 250 g/day – 267 g/day. While the survival rate ranged from 60.83% to 72.50%, and molt frequency was around 21 - 25 times during observation.
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Bahtiar, Sadida Anindya, Gunanti Mahasri, and Mohammad Faizal Ulkhaq. "Pathology Anatomy and Hemolymph Profile of Spiny Lobster (Panulirus homarus) Infested by Octolasmis sp. on Bottom Cage." Jurnal Medik Veteriner 7, no. 1 (April 1, 2024): 57–67. http://dx.doi.org/10.20473/jmv.vol7.iss1.2024.57-67.
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Spiny lobster, a fishery commodity with important economic value, is often infested by Octolasmis sp. on their bodies, which causes stress conditions that lead to death. This study aimed to determine the anatomical pathology and hemolymph profile of spiny lobster infested with Octolasmis sp. in bottom cages. The method used was an observation, where 30 lobsters (weight 112.44 ± 24.63 g) were carried out in June–July 2022 at the Pesona Bahari Wongsorejo, Banyuwangi. Hemolymph profile and anatomical pathology data were analyzed, respectively, using the Independent T-Test and Kruskal-Wallis test (α = 95%). The results based on scoring data showed a very significant difference between infected and healthy lobsters (p < 0.01), characterized by the occurrence of tail flakes, lesions on the carapace, gill melanization, and the appearance of ulcers on the ventral abdomen. A very significant change occurred in the hemolymph profile of infected lobsters compared to healthy lobsters (p < 0.01). Total hemocyte count increased with high concentrations of granular cells, respectively 22.1–37.8 ´x 106 cells/mL and 63.75–64.5%, along with lobster damage, while hyaline cells decreased. This study showed that there was a change in anatomic pathology and hemolymph profile between infected and healthy lobsters.
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Hettiarachchi, Sachithra Amarin, Ji-Yeon Hyeon, Angka Mahardini, Hyung-Suk Kim, Jun-Hwan Byun, Han-Jun Kim, Jong-Gyun Jeong, et al. "DNA barcoding and morphological identification of spiny lobsters in South Korean waters: a new record of Panulirus longipes and Panulirus homarus homarus." PeerJ 10 (January 10, 2022): e12744. http://dx.doi.org/10.7717/peerj.12744.
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To date, 19 species of spiny lobsters from the genus Panulirus have been discovered, of which only P. japonicus, P. penicilatus, P. stimpsoni, and P. versicolor have been documented in South Korean waters. In this study, we aimed to identify and update the current list of spiny lobster species that inhabit South Korean waters based on the morphological features and the phylogenetic profile of cytochrome oxidase I (COI) of mitochondrial DNA (mtDNA). Spiny lobsters were collected from the southern and eastern coasts of Jeju Island, South Korea. Phylogenetic analyses were performed using neighbor-joining (NJ), maximum likelihood (ML), and Bayesian inference (BI) methods. The ML tree was used to determine the spiny lobster lineages, thereby clustering the 17 specimens collected in this study into clades A, B, C, and D, which were reciprocally monophyletic with P. japonicus, P. homarus homarus, P. longipes, and P. stimpsoni, respectively. These clades were also supported by morphological examinations. Interestingly, morphological variations, including the connected pleural and transverse groove at the third abdominal somite, were observed in four specimens that were genetically confirmed as P. japonicus. This finding is novel within the P. japonicus taxonomical reports. Additionally, this study updates the documentation of spiny lobsters inhabiting South Korean waters as P. longipes and P. homarus homarus were recorded for the first time in this region.
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Wijaya, Danu, Amula Nurfiarini, Adriani Sri Nastiti, and Riswanto Riswanto. "KEBIASAAN MAKANAN, LUAS DAN TUMPANG TINDIH RELUNG BEBERAPA JENIS LOBSTER DI TELUK PRIGI, KABUPATEN TRENGGALEK." BAWAL Widya Riset Perikanan Tangkap 9, no. 3 (January 30, 2018): 153. http://dx.doi.org/10.15578/bawal.9.3.2017.153-161.
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Sampai saat ini, informasi mengenai kebiasaan makan, luas relung dan tumpang tindih relung mengenai lobster di Indonesia belum banyak diketahui. Tujuan penelitian ini adalah mengkaji kebiasaan makan, luas relung dan tumpang tindih relung beberapa jenis lobster di Teluk Prigi, Kabupaten Trenggalek. Pengambilan sampel isi lambung lobster diperoleh dari hasil tangkapan nelayan lobster di Teluk Prigi, Kabupaten Trenggalek, Provinsi Jawa Timur. Pengumpulan data dilakukan pada Mei dan November 2016. Jumlah sampel lobster yang diamati isi lambungnya berjumlah 63 ekor dengan kisaran panjang karapas 4,6-8,2 mm. Kebiasaan makanan beberapa jenis lobster di Teluk Prigi terdiri dari moluska, krustasea, detritus, karang, tumbuhan (makrofita) dan pasir. Luas relung tertinggi dimiliki oleh lobster bambu (Panulirus versicolor) dan lobster batik (Panulirus longipes). Tumpang tindih relung yang tinggi mengindikasikan tingginya peluang kompetisi dalam memanfaatkan makanan kecuali lobster batik merah (Panulirus longipes femoristriga).Information on feeding habits, niches breadth and overlap of some lobsters in Indonesia have not been widely known. The purposes of this study are to obtain information on the food habit, niches breadth and overlap of some lobsters in Gulf of Prigi, Trenggalek Regency. Sample of the lobster were obtained from the catch of lobster fishermen in Prigi Waters, Trenggalek Regency, East Java Province. This study was conducted on May and November 2016. The number of lobster samples observed for stomach content analysis were 63 specimen individuals with a carapace length range 4.6-8.2 mm. Food habit of some types of spiny lobsters in Gulf of Prigi consisted molluscs, crustaceans, detritus, corals, plants (macrophyta) and sands. Bamboo lobster (Panulirus versicolor) and batik lobsters (Panulirus longipes) have the highest nice breadth. Niche overlap that indicate a high chance of food competition was indicated by almost all species of spiny lobsters except batik merah lobster (Panulirus longipes femoristriga).
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Kawirian, Rizky Regina, Ridwan Affandi, Ali Mashar, and Irzal Effendi. "FOOD PREFERENCES OF EARLY JUVENILE SCALLOPED SPINY LOBSTER IN EKAS BAY, LOMBOK, INDONESIA." Indonesian Aquaculture Journal 18, no. 1 (June 30, 2023): 61. http://dx.doi.org/10.15578/iaj.18.1.2023.61-69.
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Ekas Bay is the largest bay on the island of Lombok which is the location for catching and cultivating spiny lobsters. This research was conducted from May to July 2021 on the Scalloped spiny lobster (Panulirus homarus). This study aims to identify the types of natural foods consumed and determine the preferred types of food, as well as the early juvenile feeding time of Scalloped spiny lobster located in Ekas Bay, East Lombok Regency, West Nusa Tenggara Province (NTB). Puerulus samples were collected in the last week of May 2021, enlarged puerulus was performed in submerged cages measuring 15 cm × 15 cm × 15 cm, mesh size <3 mm, with a density of 4 puerulus/m2. The cages are placed at a location 70 m to the sea from the shoreline, at a depth of 0.5, 1.0, and 1.5 m. After reaching the juvenile phase, lobsters are collected during the new and full moon phases (06.00 am, 06.00 pm and 12.00 am, respectively) in June to July 2021. A total of 60 individual juvenile lobsters (algal phase) were analyzed for their stomach contents. The average percentage of the total Index of Relative Important (IRI) obtained for the identified taxa were bivalves (22.32%), copepods (23.64%), demosponges (24.98%), while digestibdle material was 29.06%. The electivity index data (Ei) shows that lobsters prefer bivalves over other taxa. Lobster samples taken in the morning had a stomach fullness rate of 50%, indicating active feeding at night.
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Rudd, Murray A. "The non-extractive economic value of spiny lobster, Panulirus argus, in the Turks and Caicos Islands." Environmental Conservation 28, no. 3 (September 2001): 226–34. http://dx.doi.org/10.1017/s0376892901000236.
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Increases in spiny lobster size and abundance have been observed within some marine protected areas (MPAs). To date, the potential economic benefits of these changes have been assumed to derive from the effects of emigration of adult lobster to adjacent fishing grounds and/or increased larval export to downstream nurseries that sustain fisheries. According to economic theory, these effects may provide consumptive (extractive) economic value to the fishery but are only part of the total economic value. Non-extractive economic value resulting from viewing wildlife may also have an important impact on the overall economic viability of some MPAs. This research examined scuba diver preferences in the Turks and Caicos Islands using a paired comparison conjoint survey and assessed the influence that spiny lobster (Panulirus argus) presence had on market share for dive charter packages of varying environmental quality and price. Market simulations showed significant increases in market share for dives where spiny lobsters were present, implying, for the first time, that spiny lobsters have non-extractive economic value. This non-extractive value of spiny lobster may have an important impact on the economic viability of some MPAs, especially those in regions like the Turks and Caicos Islands that are highly dependent on marine-oriented nature tourism.
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Jézéquel, Youenn, Julien Bonnel, Phillipe Eliès, and Laurent Chauvaud. "Acoustic scaling in the European spiny lobster (Palinurus elephas)." Journal of the Acoustical Society of America 152, no. 6 (December 2022): 3235–44. http://dx.doi.org/10.1121/10.0016363.
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Sound is an important cue for arthropods. In insects, sound features and sound-producing apparatus are tightly correlated to enhance signal emission in larger individuals. In contrast, acoustic scaling in marine arthropods is poorly described even if they possess similar sound-producing apparatus. Here, the acoustic scaling of the European spiny lobster is analyzed by recording sounds in situ at 1 m from a wide range of body sizes. The dimensions of associated sound-producing apparatus increased with body size, indicating sound features would also be influenced by spiny lobster size. Indeed, temporal sound features changed with body size, suggesting differences in calling songs could be used for spiny lobster acoustic communication. Source levels (peak–peak) ranged from 131 to 164 dB re 1 μPa for smaller and larger lobsters, respectively, which could be explained by more efficient resonating structures in larger animals. In addition, dominant frequencies were highly constrained by ambient noise levels, masking the low-frequency content of low intensity sounds from smaller spiny lobsters. Although the ecological function of spiny lobster sounds is not clear yet, these results suggest larger body sizes benefit because louder calls increase the broadcast area and potential interactions with conspecifics, as shown in the insect bioacoustic literature.
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Tuffley, EJ, S. de Lestang, J. How, and T. Langlois. "Size matters: large spiny lobsters reduce the catchability of small conspecifics." Marine Ecology Progress Series 666 (May 20, 2021): 99–113. http://dx.doi.org/10.3354/meps13695.
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Indices of lobster abundance and population demography are often derived from pot catch rate data and rely upon constant catchability. However, there is evidence in clawed lobsters, and some spiny lobsters, that catchability is affected by conspecifics present in pots, and that this effect is sex- and size-dependent. For the first time, this study investigated this effect in Panulirus cygnus, an economically important spiny lobster species endemic to Western Australia. Three studies: (1) aquaria trials, (2) pot seeding experiments, and (3) field surveys, were used to investigate how the presence of large male and female conspecifics influence catchability in smaller, immature P. cygnus. Large P. cygnus generally reduced the catchability of small conspecifics; large males by 26-33% and large females by 14-27%. The effect of large females was complex and varied seasonally, dependent on the sex of the small lobster. Conspecific-related catchability should be a vital consideration when interpreting the results of pot-based surveys, especially if population demography changes. Analysis of the mean catch rate of large P. cygnus over the past 29 yr indicates that fishery management changes have created significant variations in the abundance of large lobsters. This is likely to have affected the catchability of smaller lobsters, which will have implications for the use of time series catch rate data in the stock assessment and management of this fishery.
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Boer, Mennofatria, Rudi Alek Wahyudin, Yusli Wardiatno, Achmad Farajallah, and Agus Alim Hakim. "Population dynamics of pronghorn spiny lobster (Panulirus penicillatus) in Palabuhanratu Bay, Sukabumi, West Java." Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 11, no. 2 (July 9, 2021): 204–14. http://dx.doi.org/10.29244/jpsl.11.2.204-214.
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Pronghorn spiny lobster (Panulirus penicillatus) is one of the dominant lobsters and has high economic value. The fishing activities are conducted continuously and put aside the preservation of these resources. This study purposed to analyze the population dynamics of pronghorn spiny lobster (Panulirus penicillatus) in Pelabuhanratu Bay, Sukabumi, West Java. The data were collected from January until December 2016 with samples from local fisherman. Lobsters were measured carapace length and total weight. Data analysis included the relationship between length and weight, growth parameters, recruitment patterns, mortality, exploitation rate, length at first maturity or incubating eggs (Lr), and length for first capture (Lc). Panulirus penicillatus from the Palabuhanratu Bay has growth pattern of a negative allometric in both males and females. The asymptotic carapace length (CL∞) of males is higher than females while the growth coefficient (K) of males is lower than females. The peak recruitment for males is expected to be in April and July, while for females in May and August. The total mortality rate of males is higher than the natural mortality rate and vice versa for females. The male lobsters have occurred overexploitation, while females have not occurred overexploitation. The female lobsters have an Lr <Lc value which indicates that the female lobsters are caught after incubating the eggs.
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Gregory Jr., Douglas R., and Ronald F. Labisky. "Movements of the Spiny Lobster Panulirus argus in South Florida." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 11 (November 1, 1986): 2228–34. http://dx.doi.org/10.1139/f86-273.
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Long-distance movements of the spiny lobster Panulirus argus were studied in two Gulf of Mexico habitats (Shallows, Mid-depth) and three Atlantic Ocean habitats (Shallows, Patch Reef, and Deep Reef) in the lower Florida Keys during the mid-1970's. Of 6062 spiny lobsters tagged and released at the five sites between June 1975 and August 1976, 465 of the 771 (13%) lobsters recovered yielded usable movement data. Eighty percent of the tags were recovered within the first 3 mo of the 8 mo commercial fishing season (July 26 – March 31). Directions and rates of movements differed significantly (P < 0.05) among sites. Movements from Gulf sites were generally oriented to the west and southwest, toward the Atlantic offshore reefs, at mean displacement velocities of 0.57 km/d (Mid-depth) and 0.24 km/d (Shallows). Movements of lobsters from the Atlantic sites were principally eastward and westward, parallel to the reef line and island chain, at mean displacement velocities of 0.02 km/d (Deep Reef) and 0.05 km/d (Shallows, Patch Reef). The more directed movements of spiny lobsters from Gulf sites may reflect a migration from nursery grounds to the Atlantic reefs, which not only constitute the primary spawning habitat but also exhibit a more stable winter environment than the shallow Gulf. Movements of spiny lobsters within Atlantic waters reflect localized random onshore–offshore dispersal patterns typical within reef environments.
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Sudewi, Sudewi, Zeny Widiastuti, Ida Komang Wardana, and Ketut Mahardika. "THE OCCURRENCE AND SEQUENCE ANALYSIS OF MILKY HEMOLYMPH DISEASE IN LOBSTER PANULIRUS HOMARUS FROM DIFFERENT LOCATIONS IN INDONESIA." Journal of Aquaculture and Fish Health 9, no. 1 (January 7, 2020): 48. http://dx.doi.org/10.20473/jafh.v9i1.15913.
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Among the high significance diseases in spiny lobster farming, Milky Hemolymph Disease of Spiny Lobster (MHD-SL) is considered as the most devastating disease which caused in mortality up to 80 % and morbidity to 100%. Investigations of this disease were mostly performed for farmed lobster and no observation was conducted for wild lobster. This study was carried out first, to investigate milky hemolymph disease occurrence both in wild and farmed spiny lobster Panulirus homarus from different locations by PCR analysis. Second, to perform nucleotide sequence analysis in order to identify, and to describe relationship of the milky disease agent obtained in this study with the disease agent from several geographical regions by phylogenetic analysis. Adult farmed lobsters were collected from Lombok, Pangandaran and Pegametan, while wild lobsters were obtained from Jembrana, Lombok, and Banyuwangi coastal areas. One farmed lobster from Pegametan and two farmed lobsters from Lombok were infected with the milky disease. Nucleotide sequence analysis demonstrated that the causative agent of milky disease obtained in this study (MHD-1, 2, and 3) exhibited 99% homologous nucleotide sequence with milky disease agent from Vietnam that was uncultured Rickettsia-like Bacteria (RLB). As a consequence, further work is needed most importantly on how to cultivate milky disease agent in order to find proper methods to alleviate milky disease problems. This paper is the first report on phylogenetic analysis of milky disease from Indonesia that pointed out a closed relationship between milky disease in the present study and from Vietnam, Madagascar, Mozambique and Tanzania.
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Franco-Bodek, Tomás, Cecilia Barradas-Ortiz, Fernando Negrete-Soto, Rossanna Rodríguez-Canul, Enrique Lozano-Álvarez, and Patricia Briones-Fourzán. "Effects of Cymatocarpus solearis (Trematoda: Brachycoeliidae) on its second intermediate host, the Caribbean spiny lobster Panulirus argus." PLOS ONE 18, no. 9 (September 29, 2023): e0287097. http://dx.doi.org/10.1371/journal.pone.0287097.
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Many digenean trematodes require three hosts to complete their life cycle. For Cymatocarpus solearis (Brachycoeliidae), the first intermediate host is unknown; the Caribbean spiny lobster Panulirus argus is a second intermediate host, and the loggerhead turtle Caretta caretta, a lobster predator, is the definitive host. Trophically-transmitted parasites may alter the behavior or general condition of intermediate hosts in ways that increase the hosts’ rates of consumption by definitive hosts. Here, we examined the effects of infection by C. solearis on P. argus by comparing several physiological and behavioral variables among uninfected lobsters (0 cysts) and lobsters with light (1–10 cysts), moderate (11–30 cysts), and heavy (>30 cysts) infections. Physiological variables were hepatosomatic index, growth rate, hemocyte count, concentration in hemolymph of cholesterol, protein, albumin, glucose, dopamine (DA) and serotonin (5-HT). Behavioral variables included seven components of the escape response (delay to escape, duration of swimming bout, distance traveled in a swimming bout, swim velocity, acceleration, force exerted, and work performed while swimming). There was no relationship between lobster size or sex and number of cysts. Significant differences among the four lobster groups occurred only in concentration of glucose (lower in heavily infected lobsters) and 5-HT (higher in heavily and moderately infected lobsters) in plasma. As changes in 5-HT concentration can modify the host’s activity patterns or choice of microhabitat, our results suggest that infection with C. solearis may alter the behavior of spiny lobsters, potentially increasing the likelihood of trophic transmission of the parasite to the definitive host.
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Jeffs, Andrew G., and Phil James. "Sea-cage culture of the spiny lobster Jasus edwardsii in New Zealand." Marine and Freshwater Research 52, no. 8 (2001): 1419. http://dx.doi.org/10.1071/mf01064.
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The potential for using suspended sea cages for the aquaculture of juvenile spiny lobsters was assessed for Jasus edwardsii in New Zealand. Lobsters were grown for a year in sea cages at three sites starting from pueruli and regularly fed on opened mussels. Larger juvenile lobsters of two size classes were also held in sea cages with small live mussels for food. Pueruli grew at rates that were close to or greater than those previously recorded from tank experiments. At the most northern site, lobsters grew most quickly to an average of 42.1 mm CL 0.4 s.e. and 36.9 g wet weight 1.0 s.e. in a year. The mortality of lobsters differed with site, but at one site was lower (14%) than was recorded in a previous tank-culture experiment (25%). The differences in growth and mortality among sites appear to be related to differences in ambient water temperatures. Larger juvenile lobsters were found to be unable to feed on the small live mussels. These results indicate that suspended sea-cage culture has considerable potential for the aquaculture of spiny lobster juveniles but will require the careful selection of sites and the development of effective feeding arrangements.
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Pozhoth, Jayagopal, and Andrew Jeffs. "Effectiveness of the Food-Safe Anaesthetic Isobutanol in the Live Transport of Tropical Spiny Lobster Species." Fishes 7, no. 1 (February 9, 2022): 40. http://dx.doi.org/10.3390/fishes7010040.
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The strong demand for live spiny lobsters in Asian markets is being met by long-distance airfreight. Holding lobsters out of water during transportation often results in mortalities due to the accumulation of metabolites, especially ammonia. This study examined the potential to improve the survival of tropical lobster species exported from India through the use of the food-safe aquatic anaesthetic isobutanol, both with and without cold stunning, typically used prior to live lobster transportation. The results of the study indicate that treatment with 50 ppm isobutanol in ambient seawater temperature (i.e., 28 °C) prior to simulated live transport for 22 h significantly reduces ammonia levels in the haemolymph in all four lobster species (Panulirus homarus, P. ornatus, P. versicolor and P. polyphagus) compared to lobsters treated with cold stunning (i.e., 16.5 °C) with and without 10 ppm isobutanol. Cold stunning at 16.5 °C combined with 10 ppm isobutanol reduced ammonia levels compared to cold stunning alone only in P. ornatus. All experimental lobsters were returned to ambient seawater after simulated transport and were alive after 48 h. These results indicate that isobutanol has the potential to be used to suppress metabolism during the live transport of tropical lobsters and to reduce mortalities during live transport.
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Petersen, Elizabeth, Clive Jones, and Bayu Priyambodo. "Bioeconomics of Spiny Lobster Farming in Indonesia." Asian Journal of Agriculture and Development 10, no. 1 (June 15, 2013): 25–39. http://dx.doi.org/10.37801/ajad2013.10.1.2.
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Spiny lobster puerulus settlements have recently been found in bays in Lombok, Indonesia, leading to the development of lobster grow-out culture in adjacent areas. This research suggests that lobster farming in Indonesia is a viable alternative livelihood for Indonesian fishers. Currently, returns to investment are modest and largely dependent on the price and availability of lobster seed and credit. Farmers are harvesting the lobsters as soon as they reach marketable size (100 grams) to minimize potential mortality and generate income as soon as possible. This research suggests there are significant benefits from delaying harvest until the lobsters are larger (approximately 300 grams) to benefit from higher yields. The profitability of the industry is not expected to be significantly impacted by large increases in fuel prices, although a disease epidemic would be devastating. Feeds are dominantly low-value finfish, the majority of which is caught by the farmer. There are significant economic benefits to be realized from the use of pelleted diets (especially if they are functional feeds) and farmers indicated that they would be willing to try them if they were available. Early adoption of pellets by this nascent industry is likely to prevent significant negative environmental impacts as the industry develops.
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PALERO, FERRAN, GUILLERMO GUERAO, and PAUL F. CLARK. "Palinustus mossambicus Barnard, 1926 (Crustacea: Decapoda: Achelata: Palinuridae); morphology of the puerulus stage." Zootaxa 1857, no. 1 (August 27, 2008): 44. http://dx.doi.org/10.11646/zootaxa.1857.1.4.
Full textAbstract:
Two adults of the rare buffalo blunthorn spiny lobster, Palinustus mossambicus Barnard, 1926 and a puerulus specimen were found while curating material from the first R/V “Dr. Fridtjof Nansen” expedition to the Western Indian Ocean. Furthermore, another puerulus-stage specimen of this spiny lobster species was found caught near Zanzibar, Tanzania. The morphological characters of the puerulus specimens indicated that they belonged to P. mossambicus, although the puerulus stage is somewhat dorsoventrally flattened, and has proportionally large pleopods. This constitutes the first puerulus description for the spiny lobsters of the genus Palinustus.
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Senevirathna, J. D. M., Gayantha R. L. Kodikara, and D. H. N. Munasinghe. "Analysis of habitat characteristics of the scalloped spiny lobster Panulirus homarus (Linnaeus, 1758) in their home range along the southern coast of Sri Lanka." Indian Journal of Fisheries 64, no. 1 (March 31, 2017): 1. http://dx.doi.org/10.21077/ijf.2017.64.1.47483-01.
Full textAbstract:
The present study was aimed to investigate the quality of home range habitat characteristics of the scalloped spiny lobster Panulirus homarus (Linnaeus, 1758) in southern coastal region of Sri Lanka. Four sites were selected from south-east (Patanagalle, Godawaya) and south-west (Weligama, Hikkaduwa) regions of the southern coast of Sri Lanka (SCSL). The bottom water quality data and benthic substrate types of their home range habitats were monitored and noted in a 25 x 25 m area covering 16 subsampling points with locality information. With the use of geographical information system (GIS) tools, the spatial distribution maps of environmental parameters were created and submerged bottom substrate types of the four sites were graphed. Salinity, temperature and dissolved oxygen correlated well with depth. Hikkaduwa site was found rich in corals with less number of scalloped spiny lobsters. Sites of south-east region of the SCSL (Patanagalle, Godawaya) were found less polluted having rocks and sandy bottom with high occurrence of scalloped spiny lobsters. Results of the study showed that Patanagalle site (south-east of SCSL) could be suggested as the most suitable site for culturing scalloped spiny lobsters.
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Rodríguez-Viera, Leandro, Erick Perera, Vivian Montero-Alejo, Rolando Perdomo-Morales, Tsai García-Galano, Gonzalo Martínez-Rodríguez, and Juan M. Mancera. "Carbohydrates digestion and metabolism in the spiny lobster (Panulirus argus): biochemical indication for limited carbohydrate utilization." PeerJ 5 (November 3, 2017): e3975. http://dx.doi.org/10.7717/peerj.3975.
Full textAbstract:
As other spiny lobsters, Panulirus argus is supposed to use preferentially proteins and lipids in energy metabolism, while carbohydrates are well digested but poorly utilized. The aim of this study was to evaluate the effect of dietary carbohydrate level on digestion and metabolism in the spiny lobster P. argus. We used complementary methodologies such as post-feeding flux of nutrients and metabolites, as well as measurements of α-amylase expression and activity in the digestive tract. Lobsters readily digested and absorbed carbohydrates with a time-course that is dependent on their content in diet. Lobster showed higher levels of free glucose and stored glycogen in different tissues as the inclusion of wheat flour increased. Modifications in intermediary metabolism revealed a decrease in amino acids catabolism coupled with a higher use of free glucose as carbohydrates rise up to 20%. However, this effect seems to be limited by the metabolic capacity of lobsters to use more than 20% of carbohydrates in diets. Lobsters were not able to tightly regulate α-amylase expression according to dietary carbohydrate level but exhibited a marked difference in secretion of this enzyme into the gut. Results are discussed to highlight the limitations to increasing carbohydrate utilization by lobsters. Further growout trials are needed to link the presented metabolic profiles with phenotypic outcomes.
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Hesse, Jan, Jenni A. Stanley, and Andrew G. Jeffs. "Lobster in a bottle: a novel technique for observing the predation of juvenile spiny lobster (Jasus edwardsii)." Marine and Freshwater Research 67, no. 11 (2016): 1625. http://dx.doi.org/10.1071/mf15098.
Full textAbstract:
Determining the impact of predators on juvenile spiny lobsters living on reefs is important for understanding recruitment processes that ultimately help determine the size of economically important lobster populations. The present study describes a novel approach for observing attempted predation on live juvenile spiny lobster (Jasus edwardsii) in situ, by presenting the lobster in a transparent container that was lit with infrared light to enable continuous monitoring, even at night, by video recording. This technique can be used to provide valuable information on overall relative predation pressure from comparative locations and habitats, as well as identify potential predators, their mode of predation, and the timing of their of predation activity. For example, predation attempts on juvenile J. edwardsii by the spotted wrasse (Notolabrus celidotus) were recorded only from 0500 to 1400 hours (daytime) and from 1900 to 2100 hours (dusk), whereas the activity by the northern conger eel (Conger wilsoni) was observed only for the period between 2100 and 0200 hours (nocturnal). This method of assessing predation of juvenile lobsters provides considerable advantages over previously used tethering methods, by allowing continuous observations over a long time period (≥24h), including night time, while also eliminating experimental mortality of juvenile lobsters.
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Gutzler, Benjamin C., Mark J. Butler, and Donald C. Behringer. "Casitas: a location-dependent ecological trap for juvenile Caribbean spiny lobsters, Panulirus argus." ICES Journal of Marine Science 72, suppl_1 (March 15, 2015): i177—i184. http://dx.doi.org/10.1093/icesjms/fsv041.
Full textAbstract:
Abstract Casitas are artificial shelters used by fishers to aggregate Caribbean spiny lobsters (Panulirus argus) for ease of capture. However, casitas may function as an ecological trap for juvenile lobsters if they are attracted to casitas and their growth or mortality is poorer compared with natural shelters. We hypothesized that juvenile lobsters may be at particular risk if attracted to casitas because they are less able than larger individuals to defend themselves, and do not forage far from shelter. We compared the nutritional condition, relative mortality, and activity of lobsters of various sizes in casitas and natural shelters in adult and juvenile lobster-dominated habitats in the Florida Keys (United States). We found that the ecological effects of casitas are complex and location-dependent. Lobsters collected from casitas and natural shelters did not differ in nutritional condition. However, juvenile lobsters in casitas experienced higher rates of mortality than did individuals in natural shelters; the mortality of large lobsters did not differ between casitas and natural shelters. Thus, casitas only function as ecological traps when deployed in nursery habitats where juvenile lobsters are lured by conspecifics to casitas where their risk of predation is higher. These results highlight the importance of accounting for animal size and location-dependent effects when considering the consequences of habitat modification for fisheries enhancement.
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Cruz, Raúl, Katia C. A. Silva, João V. M. Santana, Juliana C. Gaeta, and Israel H. A. Cintra. "Reproductive potential and stock recruitment of the Caribbean and Brazilian metapopulations of the spiny lobster, Panulirus argus (Latreille, 1804)." Crustaceana 87, no. 11-12 (2014): 1315–37. http://dx.doi.org/10.1163/15685403-00003347.
Full textAbstract:
The spiny lobsterPanulirus argus(Latreille, 1804) is the most important commercial fishing resource in the western central Atlantic and Brazil. Field studies covering the waters off southwestern Cuba and northern Brazil have improved our understanding of the variations in the reproductive potential (number of eggs), stock recruitment and reproductive efficiency of spiny lobsters according to location, depth and size class. Using the spawner-recruitment model, the reproductive potential index was correlated with the index of subsequent recruitment based on field sampling. Spiny lobster habitats in deeper waters need special attention in order to protect the species from overfishing of the recruitment. Considering the longevity and absence of reproductive senility in spiny lobsters, management strategies should ideally include the creation of spawner sanctuaries (marine protected areas) capable of restoring and maintaining the biomass of the spawning stock and the establishment of a maximum catch size of 135 mm (CL) for both sexes along the entire Brazilian coast. Based on our findings, we propose to establish spiny lobster sanctuaries (50-100 m) on the continental shelf off northern Brazil, from Amapá (5°25′N 51°0′W) to the western reaches of the coast of Pará (1°11′N 46°27′W, 0°42′N 46°45′W), covering a total surface area of 64 230 km2.
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Gaeta, Juliana, Israel Aniceto Cintra, Marina T. Torres, Jessica L. S. Da Silva, and Raúl Cruz. "Spiny lobster fecundity on the Brazilian continental shelf (Decapoda, Achelata)." Crustaceana 95, no. 5-6 (July 29, 2022): 593–604. http://dx.doi.org/10.1163/15685403-bja10208.
Full textAbstract:
Abstract Spiny lobsters are the main target of commercial fisheries along the coast of Brazil. Little is known about lobster egg production, making it difficult to estimate reproductive capacity. The purpose of this study was to update fecundity data on Brazilian lobsters as a subsidy for stock management and prevention of overexploitation. For the first time, fecundity equations for the two main Brazilian species of spiny lobster are proposed: Egg count = 29 552e0.0274x (; ; ) for Panulirus argus (Latreille, 1804) collected off Northeastern Brazil and the Great Amazon Reef System, and Egg count = 13 662e0.0361x (; ; ) for Panulirus laevicauda (Latreille, 1817) collected off Northeastern Brazil in 2021. Mean fecundity data for the period 1968-2021 show that fecundity levels declined over four decades, then partially recovered after the 6-month closed season was implemented in 2012, suggesting the measure has been effective at protecting lobster reproduction, allowing stocks of both species to recover between fishing seasons. Efficient management requires strict control of lobster fisheries, regular collection of reliable fishing data and investments in life cycle research.
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Wu, Yu-Sheng, Hsiang-Yin Chen, Shie-Jiun Wu, and Fan-Hua Nan. "Comparison of the immunomodulators “β-glucan” and “sodium alginate” on the non-specific immune response of the spiny lobster, Panulirus interruptus (Decapoda, Palinura)." Crustaceana 91, no. 12 (2018): 1409–23. http://dx.doi.org/10.1163/15685403-00003851.
Full textAbstract:
Abstract This study mainly investigated whether β-glucan or sodium alginate enhance the non-specific immune response of the spiny lobster, Panulirus interruptus. In experiments, lobsters were fed a diet containing one or the other of these compounds, to determine their effect on non-specific immune parameters in the short term (14 days). The lobsters were then bled to examine variance in total haemocyte count (THC), phenoloxidase activity, superoxide anion (O2−) production, superoxide dismutase (SOD) activity, phagocytic ratio (PR), and phagocytic index (PI). The effects of treatment with various doses of β-glucan and sodium alginate were determined. The results showed that treatment with 1-2 g of β-glucan or 2-4 g of sodium alginate significantly increased THC, O2− production, SOD activity, and PR. In conclusion, the immunomodulators β-glucan and sodium alginate can increase the non-specific immune response in spiny lobsters.
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Yusuf Taufik Hidayat, Kismiyati, and Muhamad Amin. "MORPHOLOGICAL COMPARISON OF Octolasmis sp. ECTOPARASITES INFESTING THE GILLS OF SCALLOPED SPINY LOBSTER (Panulirus homarus) WITH DIFFERENT FIXATIVE SOLUTIONS." Jurnal Biosains Pascasarjana 25, no. 2 (December 18, 2023): 156–62. http://dx.doi.org/10.20473/jbp.v25i2.2023.156-162.
Full textAbstract:
Octolasmis is a type of ectoparasite which is often found on the gills of lobsters. Octolasmis can also be a threat to lobster populations and can even cause high mortality rates. This study aims to detect the effect of different fixative solutions on the morphological characters of Octolasmis infesting the gills of scalloped spiny lobsters (Panulirus homarus). Samples of Octolasmis were collected from the gills of wildly-caught scalloped spiny lobsters in East Lombok, West Nusa Tenggara. The samples were immersed separately in two different fixative solution which are either absolute ethanol or formalin solution. After 7 days, morphological analysis of Octolasmis was analysed using an integrated optilab stereo binocular microscope and a lucida camera. The result showed that there were significant differences in the morphological condition of Octolasmis sp. including skin colour, organ appearance and size of the Octolasmis. In general, the result showed that formalin is better fixative solution.
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Sekartadji, Pranawengrum, Arning Wilujeng Ekawati, and Mohamad Fadjar. "Growth and Body Composition of Spiny Lobster (Panulirus homarus) Reared with Short-Term Fasting." Jurnal Penelitian Pendidikan IPA 9, no. 6 (June 25, 2023): 4614–18. http://dx.doi.org/10.29303/jppipa.v9i6.3620.
Full textAbstract:
Slow growth rate tends to be a challenge in the cultivation of spiny lobster (P. homarus) because it impact on long rearing periods and high operational costs, especially for feeds. Short-term starvation or fasting has known to allow the minimum feed usage without inhibiting biota growth, also improves digestive function, reduces the amount of water-soluble nutrient metabolites, and reduces operational costs. Spiny lobster (P. homarus) measuring 50.0 ± 10.0 g was reared for 6 weeks in floating net cages. Lobsters were fasted at intervals of 1 fasting day/1 day of feeding, 1 fasting day/2 days of feeding, and fed daily. Survival, growth, and feed efficiency of spiny lobster (P. homarus) were analyzed. Higher growth rate and energy retention were found in spiny lobster (P. homarus) reared with short-term fasting system. Lower FCR also found in the same rearing system. Spiny lobster (P. homarus) body content indicate its ability to store nutrient in mucle and hepatopancreas in order to adapt to starved condition. Short-term fasting can improve growth and feed efficiency in spiny lobster (P. homarus) cultivation
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Giacalone, V. M., G. D'Anna, C. Pipitone, and F. Badalamenti. "Movements and residence time of spiny lobsters, Palinurus elephas released in a marine protected area: an investigation by ultrasonic telemetry." Journal of the Marine Biological Association of the United Kingdom 86, no. 5 (August 25, 2006): 1101–6. http://dx.doi.org/10.1017/s002531540601407x.
Full textAbstract:
Marine reserves and restocking initiatives are sometimes used as a tool to enhance spiny lobster stocks. In such initiatives it is crucial to follow the movement of lobsters once they are released at sea in restocking experiments.This paper presents the results of the application of an ultrasonic telemetry system to the monitoring of 11 lobsters (90±14 mm mean carapace length) released in the Capo Gallo-Isola delle Femmine Marine Reserve in north-western Sicily, central Mediterranean. The system comprised transmitters glued onto the lobster carapace, and manual as well as automated receivers to locate tagged animals. The data (i.e. number of detected signals) were tested to assess any difference in the diel activity of lobsters. The field study lasted 79 days in total. Lobsters remained in the study area for periods ranging from a few hours to the entire duration of the study. The longest distance travelled by a tagged lobster was 2.2 km. The number of signals varied significantly across the day, with the highest value recorded in the full-light hours (1000–1500), but they were not sufficient to assess clearly the diel activity of the released lobsters.The interpretation of data suggests that: (1) released lobsters preferred a deeper habitat than that of the release site; and (2) the lobsters that reached a rough rocky area with available shelters settled there, while those that did not meet such a habitat soon moved out of hydrophone detecting range.
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Astuti, Ni Wayan Widya, Sudewi Sudewi, Bejo Slamet, Fahrudin Fahrudin, and I. Nyoman Adiasmara Giri. "The impact of fresh and artificial diet on growth and survival rate of spiny lobster, Panulirus homarus reared in floating net cage." BIO Web of Conferences 87 (2024): 03022. http://dx.doi.org/10.1051/bioconf/20248703022.
Full textAbstract:
Some research found that the growth of lobster was higher when fed with fresh diet than artificial diet. Therefore, the growth of lobster that is fed with combination of fresh and artificial diets need to be observed. This study aimed to evaluate different kinds of feed and its combination on growth and survival rate of spiny lobster Panulirus homarus. This research was designed with three treatments and three replicates, namely: lobster fed with fresh diet (A), lobster fed with artificial diet (dry pellet) (B), and lobster fed with combination of fresh and artificial diets (C). Lobsters with an average weight 100.30 ±0.79 g were reared in floating net cage with dimension 2×2×2 m3 at density 40 lobsters/cage. Lobsters were fed twice a day at 08.30 am and 03.30 pm. Fresh diets that were given contained fresh fish, shrimp, crabs and mussels (3:1:1:1). The observation was conducted for 18 weeks. Results of the experiment were lobsters fed with fresh diets (A) and combination of fresh and artificial diets (C) gave higher specific growth rate (0.62±0.03 %/day and 0.61±0.03 %/day) than lobster fed with artificial diets (B) (0.33±0.01 %/day). There were not significantly differences in survival rate of lobster (p<0.05).
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Sudewi, N. A. Giri, B. Slamet, and Haryanti. "Growth at molt of sub-adult scalloped spiny lobster Panulirus homarus reared in tanks." IOP Conference Series: Earth and Environmental Science 1221, no. 1 (August 1, 2023): 012015. http://dx.doi.org/10.1088/1755-1315/1221/1/012015.
Full textAbstract:
Abstract Grow-out of lobster performed in a tank culture system offers several advantages over floating sea cage culture, particularly in the control of environmental factors. However, the growth of lobster reared in tanks need to be evaluated to determine the rearing period of lobster to achieve market size. Growth in lobster is defined as the change in size through the molting process. Therefore, this study was performed to assess differences in weight and length increment at molt of male and female sub-adult scalloped spiny lobster Panulirus homarus, as well as to determine the annual weight increment of the lobster reared in tanks. Sub-adult lobsters with an initial average weight of 226.18±20.30 g were stocked in twenty 4000-L fiber tanks at 20 lobsters/tank. Each lobster was tagged by a photographic method of the carapace to enable the identification of individual molt, as well as growth increment. Observation of molt and growth of lobster was carried out for 42 days of rearing. Growth observation for 42 days showed that the length increment between male and female lobsters was significantly different. The average length increment of the male was significantly higher (10.00 mm) than those of the female (7.93 mm) (p<0.05). However, the weight increment was not different between the sexes. The average weight increment of males and females was 18.53 g and 20.71 g, respectively (p>0.05). In terms of the annual weight increment, both sexes also had fairly similar growth, achieving 168.38 g.yr-1, on average. This study found that there was increased growth, zero growth, and declined growth at molt in lobster P. homarus.
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Lozano-Alvarez, Enrique, and Ehud Spanier. "Behaviour and growth of captive spiny lobsters (Panulirus argus) under the risk of predation." Marine and Freshwater Research 48, no. 8 (1997): 707. http://dx.doi.org/10.1071/mf97128.
Full textAbstract:
The behaviour and growth of captive spiny lobsters (Panulirus argus) under and not under the risk of predation was investigated in four 9-m2 sea enclosures: two ‘predator enclosures’ (P1 and P2) into which one predator, the triggerfish Balistes vetula, was introduced; and two ‘non- predator enclosures’ (NP1 and NP2). Each enclosure contained a 1-m2 artificial shelter, and lobsters were provided with food ad libitum for 45 days, measured then left for a further 30 days with a reduced food supply. Inter- and intraspecific interactions and shelter use were recorded by means of underwater observations during day and night. Daytime shelter use by lobsters and fish was highest at noon and in the early morning. Activity of lobsters outside the shelters peaked around midnight in all four enclosures. Lobsters in P2 showed more activity and less shelter use than did those in all other enclosures. More predatorprey interactions were recorded in P1 than in P2, whereas intraspecific interactions were more prevalent in P2 than in the other three enclosures combined. Growth of lobsters was significantly higher only in NP1. The difference in lobster behaviour and survival between the two predator enclosures may be associated with the initial timing of shelter occupancy by the predators.