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Journal articles on the topic 'Larval stage'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Çelik, İhsan, and Pinar Çelik. "Larval Development of Penguin Tetra (Thayeria boehlkei): Morphological Observations." Journal of Agricultural Production 5, no. 2 (2024): 97–105. http://dx.doi.org/10.56430/japro.1464516.

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In this study, the larval development stage of the penguin tetra fish (Thayeria boehlkei), a popular species in the freshwater aquarium fish industry, was investigated. For this purpose, penguin tetra larvae were morphologically observed from time to hatching until they reached the juvenile stage. Throughout the larval development phase, samples were randomly taken daily and captured on a camera using a stereomicroscope. Larval development stages were categorized into four periods: (I) Yolk-sac larva, (II) Pre-flexion larva, (III) Flexion larva, and (IV) Post-flexion larva. Larvae were fed wit

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Einer, H., and E. Ellegård. "Nasal myiasis by Oestrus ovis second stage larva in an immunocompetent man: case report and literature review." Journal of Laryngology & Otology 125, no. 7 (2011): 745–46. http://dx.doi.org/10.1017/s002221511100096x.

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AbstractObjective:We report a case of an Oestrus ovis larva which developed into the second larval stage within a healthy, immunocompetent human, and we review the relevant literature.Methods:Clinical case report and Pubmed search of reports of human nasal myiasis due to Oestrus ovis, especially those describing the larval stage.Results:Humans are not normally hosts of the sheep nasal bot fly, but infestations by its larvae have been described. The eye is the most common site, but larvae have occasionally been found in the human nose. Transformation of larvae into the second and third stages,

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Rötzer, Marie A. I. N., and Joachim T. Haug. "Larval Development of the European Lobster and How Small Heterochronic Shifts Lead to a More Pronounced Metamorphosis." International Journal of Zoology 2015 (2015): 1–17. http://dx.doi.org/10.1155/2015/345172.

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We redescribe the larval stages of the European lobster,Homarus gammarus, based on autofluorescence composite imaging. We focus on larval stages (II) to (IV). Compared to the American lobster,Homarus americanus, differences are most apparent in stage (III). This stage appears more mature inH. gammarus; for example, the rostrum is already curved and bears spines, and the appendages are better developed and longer and more differentiated. InH. americanusstage (III) shows a stronger resemblance to stage (II). As a result of the morphology of stage (III), the “metamorphic” moult between stage (III

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Mulyana, Jeane Siswitasari, Achmad Farajallah, and Yusli Wardiatno. "Redescription of Larval Development in Cultured Pearl Oyster Pinctada maxima." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 23, no. 2 (2018): 109. http://dx.doi.org/10.14710/ik.ijms.23.2.109-112.

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Larval development plays a major role in efficient pearl culture. The cultured larvae will be later used for recipient and donor oysters in cultured pearl production. Larval developmental stage of silver lip pearl oyster Pinctada maxima has been reported by several studies. Those studies used female and male oyster parents directly taken from natural habitat.This study aimed to redescribe larval development of P. maxima from commercial pearl oyster culture farm in Indonesia. Larval development of this species whose parents are originated from selected groups in the pearl culture farm has not b

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CONSTANTINIDIS, Cassia Barbosa, and Mariana Cutolo de ARAUJO. "FOOD ACCEPTANCE IN DIFFERENT LARVAL STAGES OF Macrobrachium carcinus." Boletim do Instituto de Pesca 47 (2021): e666. http://dx.doi.org/10.20950/1678-2305/bip.2021.47.e666.

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Food acceptance in different larval stages of Macrobrachium carcinus was evaluated by investigating the stage at which the ingestion of inert moist diet food begins and by the incidence of Artemia nauplii and inert moist diet in the digestive tract throughout development. Two experiments were carried out: in the first study, the acceptance of the inert diet was evaluated in 60 larvae of each stage (I to XII) fed ad libitum after two hours of fasting. The inert diet was 100% accepted at zoea stage V. In the second study, newly hatched larva was then kept in larval tanks and fed with Artemia nau

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Liu, Sipei, Xiaokun Liu, Lijie Zhang, et al. "Transformation of Internal Thoracic Structures of Callobruchus maculatus (Coleoptera: Bruchidae) from Larva to Adult." Insects 16, no. 3 (2025): 324. https://doi.org/10.3390/insects16030324.

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Callobruchus maculatus is a major quarantine pest of stored legumes in China. As a holometabolous insect, it lives inside the bean it burrows into in both its larval and pupal stages. This study utilized micro-CT and 3D reconstruction to document thoracic morphological transformation during larval and pupal stages. The multi-peak fitting of cranial width was applied to determine larval instars. The results indicate that the first-instar larvae bore into beans using prothoracic muscles and those connecting the head to the mesothorax. The second-instar larva possessed the highest number of thora

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Rye, Leslie A., and Michael R. Baker. "The life history of Hysterothylacium analarum Rye and Baker, 1984 (Nematoda: Anisakidae) in Lepomis gibbosus (Pisces: Centrarchidae) in southern Ontario, Canada." Canadian Journal of Zoology 70, no. 8 (1992): 1576–84. http://dx.doi.org/10.1139/z92-217.

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Larval stages of Hysterothylacium analarum are described from Lepomis gibbosus in Dawson Pond, Ontario (45°10′N, 78°50′W). Second-stage larvae were easily distinguished from all other stages by the presence of a conical boring tooth. Third-stage larvae lacked both a boring tooth and lips. Fourth-stage larvae had well-developed lips. The ratio of ventricular appendage length to intestinal caecum length varied greatly between larval stages and adults. Prevalence and intensity of larval stages and adult H. analarum showed a distinct seasonal pattern, with one generation of adult worms per year. I

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Watanabe, H., R. Kado, S. Tsuchida, H. Miyake, M. Kyo, and S. Kojima. "Larval development and intermoult period of the hydrothermal vent barnacle Neoverruca sp." Journal of the Marine Biological Association of the United Kingdom 84, no. 4 (2004): 743–45. http://dx.doi.org/10.1017/s0025315404009841h.

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Larvae of the hydrothermal vent barnacle Neoverruca sp. were reared under laboratory conditions and larval development was observed. Under these conditions, the larvae were released from adults as first-stage nauplii, although the larvae of other deep-sea barnacles have generally been considered to be released at a later larval stage such as the cyprid stage. The larvae of Neoverruca sp. were lecithotrophic through six naupliar stages and the subsequent cyprid stage. The larval period of Neoverruca sp. was more than 96 days under the present rearing conditions, which is the longest yet reporte

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Maysaroh, Ummi, Edhi Martono, and Tri Harjaka. "The Potency of Metarhizium anisopliae in Disturbing Oryctes rhinoceros (Coleoptera: Scarabaeidae) Growth and Development." Jurnal Perlindungan Tanaman Indonesia 26, no. 1 (2022): 51. http://dx.doi.org/10.22146/jpti.71755.

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Metarhizium anisopliae is one of the most frequently used insect pathogen fungi in controlling Oryctes rhinoceros. This research aims to learn the potency of fungus M. anisopliae against O. rhinoceros larvae growth and development at the laboratory. The research methods used are T-tests comprising seven treatments and three replications. Fungi were applied in all larvae instar stages starting from the pre-molting of the first larvae instar, post-molting of the second larvae instar, active second larvae instar, pre-molting of the second larvae instar, post-molting of the third larvae instar, ac

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Vireesha, P., R. Pandey, M. Shashikala, N. Mehra, and S. Kumar. "Efficacy of Entomopathogenic Nematode, Steinernema abbasi PN-1 against Helicoverpa armigera Hubner." International Journal of Economic Plants 11, Nov, 4 (2024): 419–24. http://dx.doi.org/10.23910/2/2024.5725b.

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The experiment was conducted during May 2022 at College of Agriculture, G. B. Pant University of Agriculture & Technology, U. S. Nagar, Pantnagar, Uttarakhand, India. The Steinernema abbasi PN-1 is a local isolate of entomopathogenic nematode isolated from the soil collected from Uttarakhand, India. Under the present study, virulenceof Steinernema abbasi PN-1 against different stages of Helicoverpa armigera Hubner were tested. Virulence studies of S. abbasi PN-1 against H. armigera proved that all larval stages and pupae of H. armigera were found susceptible to the IJs of S. abbasi PN-1. T

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XU, TIAN, CHAOSHU ZENG, and KATE S. HUTSON. "Morphological descriptions of the larval and first juvenile stages of the decorator crab Camposcia retusa (Latreille, 1829) from laboratory-reared material." Zootaxa 4577, no. 2 (2019): 295. http://dx.doi.org/10.11646/zootaxa.4577.2.4.

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The complete larval and first crab stages of the decorator crab Camposcia retusa (Latreille, 1829) are described and illustrated based on laboratory-reared material for the first time. Specimens were obtained from larvae hatched from adult crabs collected from coral reefs of Queensland, Australia. Newly hatched larvae were successfully reared to settlement as the first-stage crabs. Larval development consisted of two zoeal stages and one megalopal stage. The morphology of each larval stage was compared with those available from a previous study using material from the Red Sea. Due to substanti

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Clemen, Günter, and Hartmut Greven. "Long-term effects of arrested metamorphosis on dental systems in Salamandra salamandra (Salamandridae: Urodela)." Vertebrate Zoology 68, no. 2 (2018): 143–55. http://dx.doi.org/10.3897/vz.68.e31600.

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We describe the dental systems of six larvae of Salamandra salamandra hypophysectomized in 1976 under an earlier project to arrest metamorphosis. Larvae cover roughly three developmental stages from early (intrauterine) larval stage to early metamorphosis. Animals survived surgery and lived up to 16 months until fixation. One specimen was studied by histological serial sections. In the period until fixation larvae grew from approximately 3 cm to 7 cm in length (dependent on the developmental stage before surgery) retaining their larval appearance. Changes in the dental systems depended on the

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Clemen, Günter, and Hartmut Greven. "Long-term effects of arrested metamorphosis on dental systems in Salamandra salamandra (Salamandridae: Urodela)." Vertebrate Zoology 68 (July 27, 2018): 143–55. https://doi.org/10.3897/vz.68.e31600.

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We describe the dental systems of six larvae of Salamandra salamandra hypophysectomized in 1976 under an earlier project to arrest metamorphosis. Larvae cover roughly three developmental stages from early (intrauterine) larval stage to early metamorphosis. Animals survived surgery and lived up to 16 months until fixation. One specimen was studied by histological serial sections. In the period until fixation larvae grew from approximately 3 cm to 7 cm in length (dependent on the developmental stage before surgery) retaining their larval appearance. Changes in the dental systems depended on the

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ANASTASIADOU, CHRYSSA, ALEXANDROS NTAKIS, and IOANNIS D. LEONARDOS. "Larval development of the freshwater shrimp Atyaephyra desmarestii (Millet, 1831) sensu lato (Decapoda: Caridea: Atyidae) and morphological maturation from juveniles to adults." Zootaxa 2877, no. 1 (2011): 41. http://dx.doi.org/10.11646/zootaxa.2877.1.2.

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A complete serial of larval staging of Atyaephyra desmarestii (Millet, 1831) sensu lato from Louros River (north-western Greece) was obtained in the laboratory and described in detail. Thirty berried females were collected and transferred to an aquarium containing water and vegetation from the sampling site. The newly hatched larvae were transferred into small sterile aquaria and mass cultured. After each moult, several larvae were photographed and preserved with their exuviae. The reared larvae of A. desmarestii sensu lato passed through six zoeal stages and one megalopal stage. At the experi

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Abrunhosa, Fernando A., Darlan J. B. Simith, Joely R. C. Monteiro, Antonio N. de Souza Junior, and Pedro A. C. Oliva. "Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil." Anais da Academia Brasileira de Ciências 83, no. 4 (2011): 1269–78. http://dx.doi.org/10.1590/s0001-37652011005000045.

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Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present study, the structural development of the foregut and their digestive functions were examined in larvae of two brachyurans, Uca vocator and Panopeus occidentalis, reared in the laboratory. During larval development, the foreguts of the larvae in the first and last zoeal stages and in the megalopa stag

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Duneau, David F., and Brian P. Lazzaro. "Persistence of an extracellular systemic infection across metamorphosis in a holometabolous insect." Biology Letters 14, no. 2 (2018): 20170771. http://dx.doi.org/10.1098/rsbl.2017.0771.

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Organisms with complex life cycles can differ markedly in their biology across developmental life stages. Consequently, distinct life stages can represent drastically different environments for parasites. This difference is especially striking with holometabolous insects, which have dramatically different larval and adult life stages, bridged by a complete metamorphosis. There is no a priori guarantee that a parasite infecting the larval stage would be able to persist into the adult stage. In fact, to our knowledge, transstadial transmission of extracellular pathogens has never been documented

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Callac, Nolwenn, Carolane Giraud, Dominique Pham, Dominique Ansquer, Nelly Wabete, and Viviane Boulo. "Active Microbiota of Penaeus stylirostris Larvae: Partially Shaped via Vertical and Horizontal Transmissions and Larval Ontogeny." Microorganisms 12, no. 3 (2024): 608. http://dx.doi.org/10.3390/microorganisms12030608.

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During their entire lifecycle, mariculture animals are farmed in water that contains various microorganisms with which they are in close associations. Microbial exchanges between the animals and their surrounding water can occur. However, little is known about the interactions between shrimp larvae and water, and more especially, about larval bacterial selection and microbiota modulation across ontogeny. To address this gap, using HiSeq sequencing targeting the V4 region of the 16S rRNA molecule, we investigated the active prokaryotic diversity and structure of healthy Penaeus stylirostris lar

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Rawal, Deepak. "Morphology of Einfeldia (Diptera: Chironomidae) found in Udaipur region." Morphology of Einfeldia (Diptera: Chironomidae) found in Udaipur region 1, no. 6 (2016): 23–25. https://doi.org/10.5281/zenodo.7598253.

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Larval Einfeldia were collected from Udaisagar Lake, Udaipur. They were cultured in the laboratory to assess their life cycle. Photographs and morphological descriptions of different life stages of Einfeldia were given. Larvae are red in color with well developed, non-retractile head capsule with prognathous mouthparts. The larval head capsule is dark colored sclerotized structure composed of frontoclypeal apotome. Pupal stage is short lived stage in which metamorphosis occurs. Silk secreted by larval salivary glands wrap the larva and make cocoon. Pupa hangs beneath water surface. Pupa is com

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Zavala-Leal, I., S. Dumas-Lapage, and R. Peña-Martinez. "ORGANOGÉNESIS DURANTE EL PERIODO LARVAL EN PECES." CICIMAR Oceánides 26, no. 2 (2011): 19. http://dx.doi.org/10.37543/oceanides.v26i2.100.

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La presencia de un periodo larval caracteriza a los peces con ontogenia indirecta. Este periodo de desarrollo implica una serie de transformaciones encaminadas a la adquisición de las características biológicas y ecológicas propias de la especie; y en muchos casos culmina con cambios de distribución y hábitos alimenticios. El periodo larval incluye cuatro estadios de desarrollo: larva vitelina, larva pre-flexión, larva flexión y larva post-flexión. Cada estadio de desarrollo presenta características asociados a cambios en las diferentes prioridades durante el crecimiento. De esta forma, durant

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Polte, Patrick, Paul Kotterba, Cornelius Hammer, and Tomas Gröhsler. "Survival bottlenecks in the early ontogenesis of Atlantic herring (Clupea harengus, L.) in coastal lagoon spawning areas of the western Baltic Sea." ICES Journal of Marine Science 71, no. 4 (2013): 982–90. http://dx.doi.org/10.1093/icesjms/fst050.

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Abstract Dominant drivers of larval survival are considered to include oceanographic dispersal, sea temperatures, and food availability in the phase of first-feeding. However, research progress on larval herring survival dynamics indicates that multiple factors might act on differing larval developmental stages. Hypothesizing that in inshore systems of the western Baltic Sea bottlenecks of herring development occur before the point of first-feeding, we analysed an extensive time-series of weekly abundances of early stage larvae in Greifswald Bay, an important spawning area for Western Baltic h

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Winch, Judith M., and J. Riley. "Studies on the behaviour, and development in fish, ofSubtriquetra subtriquetra: a uniquely free-living pentastomid larva from a crocodilian." Parasitology 93, no. 1 (1986): 81–98. http://dx.doi.org/10.1017/s0031182000049842.

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SUMMARYThe primary larva of the porocephalid pentastomidSubtriquetra subtriquetra, which infects the nasopharynx ofCaiman sclerops, is uniquely free-living. Eggs hatch within the nasal passages and the emergent larvae can remain infective to the fish intermediate host for 4–5 days. During this period larvae exhibit very stereotyped behaviour, alternating between a characteristic stationary ‘fishing’ posture and very brief periods of movement. Larval activity increases significantly at 3 days, probably effecting dispersal to a more favourable site for host invasion. Host location is passive and

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CARVALHO, Thaís Billalba, Ellen Cristina Monteiro de SOUZA, Jaquelinne PINHEIRO-DA-SILVA, and Marle Angélica VILLACORTA-CORREA. "Effect of body size heterogeneity on the aggressive behavior of larvae of matrinxã, Brycon amazonicus (Characiformes, Bryconidae)." Acta Amazonica 48, no. 4 (2018): 304–10. http://dx.doi.org/10.1590/1809-4392201800541.

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ABSTRACT Brycon amazonicus is a native Amazonian fish that is important for aquaculture in South America. Larval mortality is high in this species in intensive breeding systems due to aggressiveness among larvae. The present study investigated experimentally the effects of body size heterogeneity on the aggressive behavior and survival of B. amazonicus during the early stages of larval development. Two treatments (larvae groups with homogeneous and heterogeneous body size) were evaluated throughout early larval stages tested at six time points: 12, 24, 36, 48, 60 and 72 hours after hatching (H

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Ko, Chong-Yu, Yu-Shin Nai, Wei Lo, Chun-Ting Chen, and Yue-Wen Chen. "Low-Level Fluvalinate Treatment in the Larval Stage Induces Impaired Olfactory Associative Behavior of Honey Bee Workers in the Field." Insects 13, no. 3 (2022): 273. http://dx.doi.org/10.3390/insects13030273.

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Fluvalinate is a widely used insecticide for varroa mite control in apiculture. While most beekeepers have ignored the effects of low levels of fluvalinate on bees, this study aims to demonstrate its effects at very low concentrations. We first used fluvalinate doses ranging from 0.4 to 400 ng/larva to monitor the capping, pupation, and emergence rates of larval bees. Second, we used the honey bees’ proboscis extension reflex reaction to test the learning ability of adult bees that were exposed to fluvalinate doses from 0.004 to 4 ng/larva in the larval stage. The brood-capped rate of larvae d

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LUENGO, ELENA, REBECA GENIS-ARMERO, PAUL F. CLARK, and FERRAN PALERO. "Final stage phyllosoma of Galearctus sp. (Decapoda: Scyllaridae) from the Coral Sea." Zootaxa 5584, no. 1 (2025): 101–12. https://doi.org/10.11646/zootaxa.5584.1.6.

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Larval stages are known for only four out of eight Galearctus Holthuis, 2002 (Crustacea: Scyllaridae) species, a slipper lobster genus widely distributed throughout the Indo-Pacific region. DNA barcoding analyses of phyllosomae collected from the Coral Sea by the Australian Institute of Marine Science suggest the presence of two new genetic clades in the area, for which larvae cannot be discriminated morphologically. The last instar larva of an unknown species of Galearctus is described and illustrated in detail here. It is possible that this larval material may be assigned to G. umbilicatus,

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Ouellet, Patrick, Denis Lefaivre, and Vladimir Koutitonsky. "Distribution of Shrimp (Pandalus borealis) Larvae and Hydrographic Pattern in the Northern Gulf of St Lawrence." Canadian Journal of Fisheries and Aquatic Sciences 47, no. 11 (1990): 2068–78. http://dx.doi.org/10.1139/f90-231.

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The large-scale spatial distribution of northern shrimp (Pandalus borealis) larvae was analyzed in the Gulf of St. Lawrence during the spring of 1986 and 1987. Although sites of emergence are related to the principal aggregation areas of adult shrimp, it appears that the currently fished aggregations may not represent isolated populations. The uniformity of developmental stages and the wide-spread distribution of the first larval stage were consistent with the hypothesis of synchronous larval emergence among the northern Gulf shrimp The structured pattern of larval spatial distribution was not

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Ndao, Papa Demba, Justin Kantoussan, Momy Seck, et al. "Breeding and larval rearing in hatchery of Macrobrachium vollenhovenii (Herklots, 1857) in a perspective of biological control against human Schistosomiasis in tropical area." Journal of Marine Biology and Aquaculture 5, no. 1 (2019): 1–9. http://dx.doi.org/10.15436/2381-0750.19.2019.

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As part of an effort to use biological control against human schistosomiasis, post-larval production of the prawn Macrobrachium vollenhovenii was carried out in a hatchery. This species is a freshwater native and is fond of mollusks, intermediate hosts of schistosomes that transmit human diseases in the wild. The larval production of this species occurred in six (06) tanks - two 200 L and four 600 L. The management of brood stock took place in fresh water, with a ratio of one male to four females. Each fertilized female produced thousands of eggs attached to the abdomen until hatching about tw

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Hudon, Christiane, and Pierre Fradette. "Wind-Induced Advection of Larval Decapods into Baie de Plaisance (Îles de la Madeleine, Québec)." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 7 (1993): 1422–34. http://dx.doi.org/10.1139/f93-163.

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Abundance and spatial distribution of the larvae of the American lobster (Homarus americanus), the common rock crab (Cancer irroratus), and the toad crab (Hyas spp.), were monitored weekly during the summer of 1980 at a grid of 12 stations located in Baie de Plaisance. Following a period of winds ≥ 30 km∙h−1 shifting from the north to the southeast, large numbers of late-stage larvae of the three species were advected in the bay, concurrently with an intrusion of low-salinity water. Weekly abundances of consecutive larval stages were highly correlated, indicating that larvae tended to remain i

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Almola, M. H., and S. A. Alshaby. "Study of Effect of Different Poplar Aphid (Chaitophorus Euphraticus) Densities on the Predatory Efficiency and Biological Activity of the Coccinelle (Coccinella undecimpunctata)." IOP Conference Series: Earth and Environmental Science 1449, no. 1 (2025): 012045. https://doi.org/10.1088/1755-1315/1449/1/012045.

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Abstract The study examines the use of the Coccinella in the biological control of poplar aphid nymphs in Mosul city. The results showed that the ladybird larvae were effective in preying on poplar aphid nymphs, consuming an average of 28 nymphs in the first larval stage, 24 in the second, 36 in the third, and 72 in the fourth at a density of 20 nymphs/larva/day. At a density of 60 nymphs/larva/day, the predatory efficiency was during the first, second, third, and fourth larval stages. 74, 42, 102, and 118 nymphs, respectively. The study also indicated that the larval development duration at a

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López, C., R. Panadero, P. Díez, and P. Morrondo. "Development of Neostrongylus linearis in Cernuella (Cernuella) virgata experimentally infected and maintained in the subhumid climate of Galicia in northwest Spain." Journal of Helminthology 71, no. 3 (1997): 211–16. http://dx.doi.org/10.1017/s0022149x00015935.

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AbstractTwelve batches of the mollusc Cernuella (Cernuella) virgata (Mollusca: Helicidae) were deposited monthly directly on faeces containing first-stage larvae of Neostrongylus linearis, so that they were naturally infected. Every two weeks the molluscs were examined to study the larval development of N. linearis. No correlation was found between the number of first-stage larvae of N. linearis on the faeces and the number of total larvae and third-stage larvae which developed in the snails. However, a negative correlation was found between temperature and the days needed to reach the differe

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Tyrrell, Jordan J., Jackson T. Wilbourne, Alisa A. Omelchenko, Jin Yoon, and Lina Ni. "Ionotropic Receptor-dependent cool cells control the transition of temperature preference in Drosophila larvae." PLOS Genetics 17, no. 4 (2021): e1009499. http://dx.doi.org/10.1371/journal.pgen.1009499.

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Temperature sensation guides animals to avoid temperature extremes and to seek their optimal temperatures. The larval stage of Drosophila development has a dramatic effect on temperature preference. While early-stage Drosophila larvae pursue a warm temperature, late-stage larvae seek a significantly lower temperature. Previous studies suggest that this transition depends on multiple rhodopsins at the late larval stage. Here, we show that early-stage larvae, in which dorsal organ cool cells (DOCCs) are functionally blocked, exhibit similar cool preference to that of wild type late-stage larvae.

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Wakabayashi, Kaori, and Bruce F. Phillips. "Morphological descriptions of laboratory reared larvae and post-larvae of the Australian shovel-nosed lobster Thenus australiensis Burton & Davie, 2007 (Decapoda, Scyllaridae)." Crustaceana 89, no. 1 (2016): 97–117. http://dx.doi.org/10.1163/15685403-00003511.

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Complete larval development from newly hatched larvae up to the juvenile stage was successfully achieved in the Australian shovel-nosed lobsterThenus australiensisunder laboratory conditions. The larvae of this species passed through four phyllosoma stages (each stage has a single instar), and developed into the first juvenile stage via a post-larval, nisto stage. The shortest and mean durations from hatching to metamorphosis at a water temperature of 25°C were 32 and 38 days, respectively. Morphologies of body and appendages for all four phyllosoma stages and the nisto stage were described. T

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Køie, Marianne, Bjørn Berland, and Michäel D. B. Burt. "Development to third-stage larvae occurs in the eggs of Anisakis simplex and Pseudotetranova decipiens (Nematoda, Ascaridoidea, Anisakidae)." Canadian Journal of Fisheries and Aquatic Sciences 52, S1 (1995): 134–39. http://dx.doi.org/10.1139/f95-519.

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Two moults occur during larval development in the eggs of Anisakis simplex (Rudolphi, 1809) and Pseudoterranova decipiens (Krabbe, 1878) from the North Atlantic. Live larvae forced out of eggs in sea water by coverslip pressure shortly before spontaneous hatching were surrounded by the thin cuticle of the first-stage larva. Infective larvae from naturally hatched eggs are loosely ensheathed in the thick cuticle of the second-stage larva. Thus, it is the third-stage larva that emerges from the egg of both species and not the second-stage larva as previously believed. The thin, smooth, fragile c

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Kizhakudan, Joe K., and S. Krishnamoorthi. "Complete larval development of Thenus unimaculatus Burton & Davie, 2007 (Decapoda, Scyllaridae)." Crustaceana 87, no. 5 (2014): 570–84. http://dx.doi.org/10.1163/15685403-00003306.

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Larval development of the shovel-nosed lobster Thenus unimaculatus Burton & Davie, 2007 is described based on laboratory studies. The larval stages included four stages of phyllosoma (I-IV), followed by a post larval, non-feeding nisto stage which metamorphosed to the juvenile stage, also known as first seed. The nisto stage is reached in 26-30 days, the average duration of each phyllosoma (I-IV) and nisto was 7, 5, 7, 7 and 4 days, respectively. The phyllosomas are characteristically flattened, leaf-like, transparent planktonic larvae, while the nisto, translucent in appearance, remains s

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Orengo-Green, José J., M. Ángeles Marcos-García, Leif Bloss Carstensen, and Antonio Ricarte. "First Morpho-Functional Assessment of Immature Stages of Pelecocera Species (Diptera: Syrphidae) Feeding on False Truffles." Insects 15, no. 3 (2024): 191. http://dx.doi.org/10.3390/insects15030191.

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With 14 species, Pelecocera Meigen, 1822 is a scarce and small genus of hoverflies (Diptera: Syrphidae: Rhingiini) from the Holarctic Region. Apart from the finding of larvae of Pelecocera (Chamaesyrphus) japonica (Shiraki, 1956) in fungi in Japan, the larval biology of these hoverflies is virtually unknown. The early stages of all Pelecocera species are undescribed. The adults of Pelecocera (Pelecocera) tricincta Meigen, 1822 and Pelecocera (Chamaesyrphus) lugubris Perris, 1839 are found in Palearctic conifer forests with sand dunes. We here report the first morphological evidence of the imma

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Stoeckel, James A., Dianna K. Padilla, Daniel W. Schneider, and Chris R. Rehmann. "Laboratory culture of Dreissena polymorpha larvae: spawning success, adult fecundity, and larval mortality patterns." Canadian Journal of Zoology 82, no. 9 (2004): 1436–43. http://dx.doi.org/10.1139/z04-125.

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Understanding the entire life history, especially critical periods during the life cycle of a species, is important for understanding population dynamics and is crucial for control of nuisance species. Errors in estimates of growth rates and recruitment in field and modeling studies are likely to occur if one assumes uniform rather than size- or stage-specific mortalities for larval stages. Similarly, effects of brood-stock health on adult fecundity and larval mortality patterns might affect results of laboratory studies investigating larval life history. We maintained zebra mussels, Dreissena

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Wehrtmann, Ingo S., and Luis Albornoz. "Larvae of Nauticaris magellanica (Decapoda: Caridea: Hippolytidae) reared in the laboratory differ morphologically from those in nature." Journal of the Marine Biological Association of the United Kingdom 83, no. 5 (2003): 949–57. http://dx.doi.org/10.1017/s0025315403008130h.

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The variability of larval morphology in the caridean shrimp Nauticaris magellanica cultivated in the laboratory was analysed, and its applicability for the identification of larval stages collected from the plankton evaluated. Both morphometric and meristic variability of selected appendages was analysed comparing larvae from the rearing experiment with those obtained from the plankton. Larval development in the laboratory consisted of at least nine zoeal and five decapodid stages, followed by the first juvenile stage. Larvae collected from the plankton, comprising individuals from zoea II to,

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Gravinese, Philip M., Ian C. Enochs, Derek P. Manzello, and Robert van Woesik. "Ocean acidification changes the vertical movement of stone crab larvae." Biology Letters 15, no. 12 (2019): 20190414. http://dx.doi.org/10.1098/rsbl.2019.0414.

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Anthropogenic activities are increasing ocean temperature and decreasing ocean pH. Some coastal habitats are experiencing increases in organic runoff, which when coupled with a loss of vegetated coastline can accelerate reductions in seawater pH. Marine larvae that hatch in coastal habitats may not have the ability to respond to elevated temperature and changes in seawater pH. This study examined the response of Florida stone crab ( Menippe mercenaria ) larvae to elevated temperature (30°C control and 32°C treatment) and CO 2 -induced reductions in pH (8.05 pH control and 7.80 pH treatment). W

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Harbecke, R., M. Meise, A. Holz, et al. "Larval and imaginal pathways in early development of Drosophila." International Journal of Developmental Biology 40, no. 1 (1996): 197–204. https://doi.org/10.1387/ijdb.8735929.

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In holometabolous development, higher insects have two different life forms, the larva and the imago. Both larval and imaginal cells are derived from cells of the blastoderm stage. After the final embryonic wave of mitosis, however, only the imaginal cells remain diploid, proliferate massively and do not differentiate until metamorphosis. The separation of these two pathways was described by many authors as a fundamental process that must take place at a very early stage of development, most probably the blastoderm stage. Mainly by using single cell transplantations at the blastoderm or early

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Roslina, Roslina, Putri Nurhanida Rizky, and Moh Zainal Arifin. "FEED MANAGEMENT INNOVATIONS FOR ENHANCING THE GROWTH PERFORMANCE OF VANNAMEI SHRIMP LARVAE (LITOPENAEUS VANNAMEI)." Jurnal Perikanan Unram 15, no. 2 (2025): 966–79. https://doi.org/10.29303/jp.v15i2.1499.

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Feed management is a crucial component in the cultivation of vannamei shrimp, particularly during the larval stage which requires complex and varied nutritional needs. This study aims to explore innovative feed management strategies by combining natural and artificial feeds in an industrial-scale setting at Hatchery PT Suri Tani Pemuka, Bali. Natural feeds used included Thalassiosira sp. and Artemia salina, along with six types of artificial feeds administered throughout the larval rearing period from Nauplius to Post Larva (PL) 11 stages. Growth parameters, larval health, and water quality we

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Egan, EA, and DT Anderson. "Larval development of Elminius covertus Foster and Hexaminius popeiana Foster (Cirripedia : Archaeobalanidae : Elminiinae) reared in the laboratory." Marine and Freshwater Research 36, no. 3 (1985): 383. http://dx.doi.org/10.1071/mf9850383.

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The presence of embryos in the mantle cavity of E. covertus and H. popeiana has been monitored over a 2-year period. E. covertus has a clearly defined seasonal pattern with peak breeding during the winter and early spring. H. popeiana shows high levels of breeding activity throughout the year. The larval stages of E. covertus and H. popeiana are described from larvae reared in the laboratory. Morphological differences in each larval stage allow the larvae of the two species to be distinguished without difficulty. Differences between the larval stages of E. covertus and E. modestus are more min

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Pitts, James P., and Robert W. Matthews. "Description of the Larva of Sphaeropthalma pensylvanica (Lepeletier) (Hymenoptera: Mutillidae: Sphaeropthalminae)." Journal of Entomological Science 35, no. 3 (2000): 334–37. http://dx.doi.org/10.18474/0749-8004-35.3.334.

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The larval stage of Sphaeropthalma pensylvanica (Lepeletier) is described and differentiated from other known larval Mutillidae. The larva of S. pensylvanica differs from the other described larvae of Mutillidae by the following combination of characters: the tenth abdominal segment rounded and not produced over the anus, a basal mandibular tooth half the size of the third mandibular tooth, large, densely clustered sensilla on the labrum, and prominent pleural lobes.

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Hudon, Christiane, and Pierre Fradette. "Planktonic Growth of Larval Lobster (Homarus americanus) off îles de la Madeleine (Quebec), Gulf of St. Lawrence." Canadian Journal of Fisheries and Aquatic Sciences 45, no. 5 (1988): 868–78. http://dx.doi.org/10.1139/f88-105.

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The carapace length of the three planktonic larval and one postlarval stages of Homarus americanus was measured for larvae collected off îles de la Madeleine over three summers. Mean larval size did not vary between years or locations around the islands. The size of stages I and II remained constant throughout the summer, but after molting into stages III and IV, larvae diminished in size through the summer. Size frequency distribution became more scattered as larvae grew into more advanced stages. The increase of variance with size between stages I–IV followed the same progression as that obs

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BARROS-ALVES, SAMARA DE PAIVA, EDUARDO ANTONIO JR BOLLA, RAFAEL DE CARVALHO SANTOS, DOUGLAS FERNANDES RODRIGUES ALVES, and GUSTAVO LUIS HIROSE. "Larval development of the crab Amphithrax hemphilli (Rathbun, 1892) (Decapoda, Brachyura, Mithracidae) described from laboratory-reared material." Zootaxa 5195, no. 6 (2022): 522–38. http://dx.doi.org/10.11646/zootaxa.5195.6.2.

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The complete larval development of Amphithrax hemphilli was described, illustrated, and compared with that of the previously described larvae of the genus Mithrax sensu lato. Specimens of A. hemphilli were sampled from the northeastern Brazilian coast. The larval development of A. hemphilli consisted of two zoeal stages and one megalopa. Amphithrax hemphilli shows morphological features in all stages of larval development that differ from those observed in other species of Amphithrax, Mithrax, and Maguimithrax. In the first larval stage, A. hemphilli was the only species with two aesthetascs o

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Benítez, Sergio A., Thomas M. Iliffe, Salvador Martínez, Juan Carlos Ojeda, José Luis Villalobos, and Fernando Alvarez. "Larval development of the stygobitic shrimp Creaseria morleyi (Creaser, 1936) (Decapoda: Caridea: Palaemonidae) from the Yucatán Peninsula, Mexico." Journal of Crustacean Biology 40, no. 3 (2020): 221–29. http://dx.doi.org/10.1093/jcbiol/ruaa006.

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Abstract Although the larval development of epigean palaemonid shrimps has been studied extensively, only a few investigations deal with stygobitic species. We present the larval development of the cave-adapted Creaseria morleyi (Creaser, 1936) from anchialine caves in the Tulum area, Quintana Roo, Yucatán Peninsula, Mexico. Through the discovery of a series of larvae at different stages of development, we constructed a sequence extending through the juvenile stage. The larvae (41) were captured in plankton tows above the halocline at depths ranging between 11 and 15 m during eight surveys con

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Nasrolahi, Ali, Alireza Sari, Seyedjafar Saifabadi, and Masoumeh Malek. "Effects of algal diet on larval survival and growth of the barnacle Amphibalanus (=Balanus) improvisus." Journal of the Marine Biological Association of the United Kingdom 87, no. 5 (2007): 1227–33. http://dx.doi.org/10.1017/s0025315407057037.

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The effects of algal diet on larval survival and growth of the barnacle Amphibalanus improvisus was for the first time examined under controlled laboratory conditions. Larvae were obtained by dissecting egg lamellae at later developmental stage out of the adults. Hatched nauplii were reared in 0.6-l glass beakers (200 larvae l-1) on a monoalgal diet of Chaetoceros calcitrans, Chlorella vulgaris and Scenedesmus quadricauda at 1x105 and 2x105 cells ml-1, under continuous light at 25 ±1°C. The rate of development, survival and size (at Stage V) of the larvae were measured for each diet. The major

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SATAR, ALİ, ZEKİYE SULUDERE, SAVAŞ CANBULAT, and CENGİZHAN ÖZBAY. "Rearing the larval stages of Distoleon tetragrammicus (Fabricius, 1798) (Neuroptera: Myrmeleontidae) from egg to adult, with notes on their behaviour." Zootaxa 1371, no. 1 (2006): 57. http://dx.doi.org/10.11646/zootaxa.1371.1.5.

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Eggs of the ant-lion Distoleon tetragrammicus (Fabricius, 1798) were obtained from gravid females for the first time. Larvae were reared to the adult stage from eggs. The eggs and the different parts of the larva such as head, mandibles and antennae, are described and illustrated and larval behavior in each stage was monitored.

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Hudon, Christiane, Pierre Fradette, and Pierre Legendre. "La répartition horizontale et verticale des larves de homard (Homarus americanus) autour des îles de la Madeleine, golfe du Saint-Laurent." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 11 (1986): 2164–76. http://dx.doi.org/10.1139/f86-265.

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Thirty-nine stations localized around the eastern tip of the Îles de la Madeleine, in two lagoons, and in the baie de Plaisance were sampled using plankton net tows during the summers of 1978, 1980, and 1981. The horizontal and vertical distributions of each of the four larval stages of Homarus americanus were assessed from sets of surface tows using simple neuston and meter nets (1978 and 1980) as well as a three-compartment plankton net (1981). Most of the stage I larval production takes place in the northeast and southeast regions. However, the abundance of stage IV larvae is low in the sou

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Bradford, R. W., D. Griffin, and B. D. Bruce. "Estimating the duration of the pelagic phyllosoma phase of the southern rock lobster, Jasus edwardsii (Hutton)." Marine and Freshwater Research 66, no. 3 (2015): 213. http://dx.doi.org/10.1071/mf14065.

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The phyllosoma larva of the southern rock lobster, Jasus edwardsii, is thought to be among the longest larval phases of any planktonic larva, with estimates in the literature ranging from 12 to 24 months. In the present study, we have used an extensive archive of samples (over 2800 samples with 680 phyllosoma) to refine the estimate of the duration of the pelagic phase. The distribution through the year of larval stages suggested that larvae from two separate spawning events were present in any 12-month period. Using regression analysis, we have estimated the duration of the phyllosoma phase t

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León, Roxana, Leonardo R. Castro, and Mario Cáceres. "Dispersal of Munida gregaria (Decapoda: Galatheidae) larvae in Patagonian channels of southern Chile." ICES Journal of Marine Science 65, no. 7 (2008): 1131–43. http://dx.doi.org/10.1093/icesjms/fsn093.

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Abstract León, R., Castro, L. R., and Cáceres, M. 2008. Dispersal of Munida gregaria (Decapoda: Galatheidae) larvae in Patagonian channels of southern Chile. – ICES Journal of Marine Science, 65: 1131–1143. The dispersal of Munida gregaria larvae in Chilean Patagonian channels was assessed in spring 2002 and 2003, and winter 2003. In winter 2003, zoea I was the most abundant stage in all channels and there were no larval stages older than zoea IV. In spring 2002 and 2003, there were six larval stages in all channels, and the greater abundance of older larvae suggested that reproduction takes p

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Nogata, Yasuyuki, and Kiyotaka Matsumura. "Larval development and settlement of a whale barnacle." Biology Letters 2, no. 1 (2005): 92–93. http://dx.doi.org/10.1098/rsbl.2005.0409.

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Larval development and settlement of whale barnacles have not previously been described, unlike intertidal barnacles. Indeed, the mechanisms of the association between barnacles and whales have not been studied. Here we describe the larval development and settlement of the whale barnacle, Coronula diadema , and possible involvement of a cue from the host in inducing larval settlement. Eight-cell stage embryos were collected from C. diadema on a stranded humpback whale, incubated in filtered seawater for 7 days, and nauplius larvae hatched out. When fed with Chaetoceros gracilis , the nauplii d

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