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Journal articles on the topic 'Scylla serrata – South Africa'

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Published: 4 June 2021

Last updated: 5 February 2022

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1

Robertson, W. D., and A. Kruger. "Size at Maturity, Mating and Spawning in the Portunid Crab Scylla serrata (Forskål) in Natal, South Africa." Estuarine, Coastal and Shelf Science 39, no. 2 (1994): 185–200. http://dx.doi.org/10.1006/ecss.1994.1057.

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2

Davis, Jerome A., Mathieu Wille, Thomas Hecht, and Patrick Sorgeloos. "Optimal first feed organism for South African mud crab Scylla serrata (Forsk�l) larvae." Aquaculture International 13, no. 3 (2005): 187–201. http://dx.doi.org/10.1007/s10499-004-1496-8.

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3

Davis, J. A., M. Wille, T. Hecht, and P. Sorgeloos. "Optimum time for weaning South African Scylla serrata (Forsk�l) larvae from rotifers to Artemia." Aquaculture International 13, no. 3 (2005): 203–16. http://dx.doi.org/10.1007/s10499-004-1915-x.

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4

Gopurenko, David, Jane M. Hughes, and Lynda Bellchambers. "Colonisation of the south-west Australian coastline by mud crabs: evidence for a recent range expansion or human-induced translocation?" Marine and Freshwater Research 54, no. 7 (2003): 833. http://dx.doi.org/10.1071/mf03033.

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Mud crabs (Portunidae; Scylla spp.) have become established recently in some south-west Australian estuaries – almost 1000 km south of their recorded distribution. Colonisation may have occurred by a natural range expansion from the north-west or by translocation from source(s) within the Indo-West Pacific. To identify the species and the potential source population(s), genetic analyses was used to compare south-west crabs (N = 32) to other populations. Levels of diversity at two independent genetic markers were also compared to obtain relative estimates of effective population size between colonist and suspected source population(s). Comparisons of mitochondrial DNA sequences (COI) indicated that all south-west crabs were Scylla serrata. Indeed, the sole haplotype found among colonists was identical to one prevalent but endemic to more diverse north-west Australian populations. In contrast, source and colonist populations had equally high levels of genetic diversity at two microsatellite loci. It is argued that the south-west region was colonised by large numbers of S. serrata from north-west Australia through a recruitment event enhanced by the strong 1999/2000 Leeuwin Current. Differences in diversity among nuclear and mitochondrial loci may reflect different responses to the colonisation process; it is predicted that such differences are prevalent among plankton-dispersed species.

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5

Meynecke, J. O., and R. G. Richards. "A full life cycle and spatially explicit individual-based model for the giant mud crab (Scylla serrata): a case study from a marine protected area." ICES Journal of Marine Science 71, no. 3 (2013): 484–98. http://dx.doi.org/10.1093/icesjms/fst181.

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Abstract The giant mud crab (Scylla serrata) is an important fisheries species throughout southeast Asia and the South Pacific. In Australia, marine protected areas (MPAs) and fish habitats have been declared specifically to protect the local populations of S. serrata. The cannibalistic behaviour of S. serrata coupled with the potential attraction of increased predators may counteract the effect of excluding fishing from these areas as a means of increasing the local crab population. The population dynamics of S. serrata could also be confounded by the spatio-temporal variability in environmental conditions (e.g. run-off and temperature). Here, we used a spatially explicit individual-based model (IBM) to explore the population dynamics of S. serrata in an MPA located in southern Moreton Bay, Queensland, Australia. This IBM simulated the life cycle dynamics of individual S. serrata and integrated the key processes affecting its population dynamics. These processes include physical transport of the planktonic life stages, movement, growth, metamorphosis, setting, reproduction, spawning, harvesting, and predation. Individual variability was built into the model to account for demographic variation. The modelled scenarios indicated that the effect of the different harvest strategies trialled on the population dynamics after 30 months and the MPA influenced the number of individuals in the creek system resulting in a partial 35% population increase. Further development and application of this model has implications for MPAs and catch limits under multiple stressors including climate change.

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6

Diana, Farah, Hafinuddin Hafinuddin, and Muhajir Ansar. "PENGARUH JENIS UMPAN YANG BERBEDA TERHADAP HASIL TANGKAPAN KEPITING BAKAU (Scylla serrata) DENGAN MENGGUNAKAN ALAT TANGKAP BUBU." JURNAL PERIKANAN TROPIS 5, no. 2 (2018): 119. http://dx.doi.org/10.35308/jpt.v5i2.1031.

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Mangrove crab (Scylla serrata) is one of the fishery commodities that have higheconomic value. In addition, mangrove crab is one of export commodities to several countries such as United States, Europe, Australia, Japan, Hongkong,Taiwan, Singapore and South Korea. In general, the fishing activities of mangrove crabs in the general waters of many fishermen use different baits,it's just not known which bait is best for catching mangrove crabs. The purpose ofthis study is to determine the effect of using different types of bait to the mangrove crab catch by using bubu and know the type of bait that is most effective against the catching of mangrove crab. This research method used Completely Randomized Design (RAL) with three treatments and three replications: P1 = shredded fish, P2 = Shark skin bark, and P3 = Chicken head bait. The parameters in this study are the number of catches, the feed response and the water quality parameters, the results of this study indicate the number of catches P1 = 55.55%, P2 = 22.22% and P3 = 33.33%. While feed response time in this research P1 = 1.61, P2 = 12.03, and P3 = 11.74. From the results of this study showed the use of different baits have a very significant effect on the number of mangrove crabs (scilla serata). While the feedback response also shows the results are very real (Fcal> Ftab).

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7

Coke, M. "First records of Atyoida serrata (CS Bate, 1888) from South Africa (Crustacea: Caridea: Atyidae)." African Journal of Aquatic Science 43, no. 2 (2018): 175–77. http://dx.doi.org/10.2989/16085914.2018.1474084.

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8

Basu, Sudipa, and Apurba Roy. "Economic assessment of mud crab (Scylla Serrata) culture as an adaptation strategy to salinity intrusion in south-west region of Bangladesh." International Journal of Environmental Studies 75, no. 6 (2018): 891–902. http://dx.doi.org/10.1080/00207233.2018.1470402.

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9

Apine, Elina, Lucy M. Turner, Lynda D. Rodwell, and Ramachandra Bhatta. "The application of the sustainable livelihood approach to small scale-fisheries: The case of mud crab Scylla serrata in South west India." Ocean & Coastal Management 170 (March 2019): 17–28. http://dx.doi.org/10.1016/j.ocecoaman.2018.12.024.

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10

Glaspie, Cassandra N., and Rochelle D. Seitz. "Multiple stressors associated with acid sulfate soil effluent influence mud crab Scylla serrata predation on Sydney rock oysters Saccostrea glomerata." Marine and Freshwater Research 68, no. 4 (2017): 743. http://dx.doi.org/10.1071/mf15350.

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Studies of long-term exposure to multiple stressors on predator–prey interactions are necessary to determine the effect of coastal degradation on organisms that have had generations to adapt and acclimate to change. In New South Wales, Australia, a natural gradient of multiple stressors produced by acid sulfate soil effluent was used to determine the impact of exposure to multiple stressors on predator–prey dynamics between mud crabs Scylla serrata and Sydney rock oysters Saccostrea glomerata. Wild oysters were collected from two polluted and two reference sites that varied in their distance away from a flood gate that acted as a point source of water with low salinity, low pH and low alkalinity. Oysters from sites affected by multiple stressors and those from reference sites were offered to mud crabs in 48-h laboratory no-choice feeding trials. Oysters from affected sites had lower mortality than those from a reference site that was farthest from the source of polluted water. Linear models containing distance from flood gate best explained oyster mortality. Differences in rates of mortality were due to the decreased time crabs spent foraging on affected oysters. Long-term exposure to acid sulfate soil effluent alters trophic dynamics between predators and prey, which may have consequences for coastal food webs.

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11

Gunasekaran, Thangaraj, Ayyaru Gopalakrishnan, Balaraman Deivasigamani, Muhil Vannan Seralathan, and Palani Kathirkaman. "Spontaneous white spot syndrome virus (WSSV) infection in mud crab (Scylla serrata Forskal 1775) fattening pens farm of south east coast of India." Comparative Clinical Pathology 27, no. 2 (2017): 413–19. http://dx.doi.org/10.1007/s00580-017-2607-z.

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12

Mirera, David Oersted, and Per-Olav Moksnes. "Comparative performance of wild juvenile mud crab (Scylla serrata) in different culture systems in East Africa: effect of shelter, crab size and stocking density." Aquaculture International 23, no. 1 (2014): 155–73. http://dx.doi.org/10.1007/s10499-014-9805-3.

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13

Yunus, Budiman, and Suwarni. "THE CORRELATION OF CARAPACE WIDTH – BODY WEIGHT, CONDITION FACTOR, AND ABUNDANCE OF SCYLLA SERRATA FORSSKÅL, 1775 IN EMBANKMENT LANE SILVOFISHERY DEVELOPMENT AREA OF MAROS DISTRICT." International Journal of Research -GRANTHAALAYAH 7, no. 12 (2020): 177–88. http://dx.doi.org/10.29121/granthaalayah.v7.i12.2019.310.

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The research aims to find out the correlation of carapace width – weight, condition factor and abundance of mangrove crab based on observation time and sex in the coastal waters of Maros district, South Sulawesi. This research provides information on the pattern of growth and chubbiness of mangrove crabs and its abundance in the coastal area of Maros district, South Sulawesi. The study was conducted from early February until the end of April 2019. Sampling was conducted on the coastal area of Kuri Lompo and estuary of Maros which is an integrated mangrove pond development (silvofishery). 213 mangrove crabs (120 male and 93 female) obtained from fishermen were measured. The coefficient b of male and female mangrove crabs in February and March were 3.3626 and 2.6674, respectively. In April, b value of male and female mangrove crab was 3.5965 and 2.6506, respectively. This relation shows the growth type for males is allometric-positive whereas for females is allometric-negative. In April also saw the same growth coefficient in the previous month allometric positive for males and allometric negative for females. In general, the condition factor of male mangrove crabs in February and March is greater than female mangrove crabs. While, in April the condition factor of female mangrove crab is greater than male mangrove crab. The nature of condition factor of mangrove crab represents the distribution of crab abundance in the embankment lane silvofishery development area of 0.015 ind./m2.

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14

Finch, Jemma M., and Trevor R. Hill. "A late Quaternary pollen sequence from Mfabeni Peatland, South Africa: Reconstructing forest history in Maputaland." Quaternary Research 70, no. 3 (2008): 442–50. http://dx.doi.org/10.1016/j.yqres.2008.07.003.

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AbstractThis paper documents a continuous ∼ 44,000-yr pollen record derived from the Mfabeni Peatland on the Maputaland Coastal Plain. A detailed fossil pollen analysis indicates the existence of extensive Podocarpus-abundant coastal forests before ∼ 33,000 cal yr BP. The onset of wetter local conditions after this time is inferred from forest retreat and the development of swampy conditions. Conditions during the last glacial maximum (∼ 21,000 cal yr BP) are inferred to have been colder and drier than the present, as evidenced by forest retreat and replacement of swampy reed/sedge communities by dry grassland. Forest growth and expansion during the Holocene Altithermal (∼ 8000–6000 cal yr BP) indicates warm, relatively moist conditions. Previous records from Maputaland have suggested a northward migration of Podocarpus forest during the late Holocene. However, we interpret a mid-Holocene decline in Podocarpus at Mfabeni as evidence of deforestation. Forest clearance during the mid-Holocene is supported by the appearance of Morella serrata, suggesting a shift towards more open grassland/savanna, possibly due to burning. These signals of human impact are coupled with an increase in Acacia, indicative of the development of secondary forest and hence disturbance.

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15

Fondo, Esther N., and Benrick Ogutu. "Sustainable crab fishery for Blue Economy in Kenya." Aquatic Ecosystem Health & Management 24, no. 1 (2021): 21–26. http://dx.doi.org/10.14321/aehm.024.01.05.

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Abstract Lakes, rivers and oceans provide unique resources and support fisheries and aquaculture worldwide. The fisheries and aquaculture sector of Kenya contributes approximately 0.8% to the country’s GDP. Marine production is about 9 000 tonnes per year. Marine finfish form the bulk of the marine production, while shellfish (e.g. prawns, lobsters and crabs), molluscs (e.g. octopi and squids) are underexploited. The Fishery sector has the potential of about USD 5 billion for the Blue Economy in Kenya. Crab fishery in Kenya is active in some areas of the south and north coast. The crab resources along the Kenyan waters are diverse and a variety of species are edible. The most commonly fished crab by artisanal fishers is the Mangrove Mud Crab Scylla serrata. Semi-commercial and industrial fishers usually have portunid and other deep sea crabs as by-catch in trawl and longline fisheries, which in many cases are unutilized. Exports of live crabs have increased over the years, with exports mainly to Asian countries. Export of frozen crabs started recently. The need to sustainably utilize lake, river and ocean resources is recognized and important in promoting Blue Economy. Sustainable development of crab fishery provides a potential area for the Blue Economy development in Kenya. Research is essential to crab fishery development.

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16

Majewska, Roksana, and Bart Van de Vijver. "Nagumoea serrata, a new diatom species (Bacillariophyceae) found on seagrass from the south-eastern coast of Africa (Indian Ocean)." Fottea 20, no. 1 (2020): 98–103. http://dx.doi.org/10.5507/fot.2019.019.

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17

Robertson, W. D., and S. E. Piper. "Population estimates of the crabScylla serrata(Forskål, 1755) (Decapoda: Portunidae) in two closed estuaries in Natal, South Africa, from mark-recapture methods." South African Journal of Marine Science 11, no. 1 (1991): 193–202. http://dx.doi.org/10.2989/025776191784287691.

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18

Forbes, A. T., and D. G. Hay. "Effects of a major cyclone on the abundance and larval recruitment of the portunid crabScylla serrata(Forskal) in the St Lucia Estuary, Natal, South Africa." South African Journal of Marine Science 7, no. 1 (1988): 219–25. http://dx.doi.org/10.2989/025776188784379206.

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19

ADNET, SYLVAIN, HENRI CAPPETTA, and RODOLPHE TABUCE. "A Middle–Late Eocene vertebrate fauna (marine fish and mammals) from southwestern Morocco; preliminary report: age and palaeobiogeographical implications." Geological Magazine 147, no. 6 (2010): 860–70. http://dx.doi.org/10.1017/s0016756810000348.

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AbstractRecent field work in the southern Moroccan Sahara (‘Western Sahara’), south of the city of ad-Dakhla, has led to the discovery of several new fossiliferous sites with fossil vertebrates in sedimentary deposits previously reported for the Mio-Pliocene. The sedimentology and geological setting of the studied area are briefly reported here, and at least three units have been identified in successive stratigraphical sequences according to their fossil content. The first preliminary list of vertebrate associations is reported and consists mainly of isolated teeth belonging to selachian and bony fishes, a proboscidean tooth currently assigned to ?Numidotherium sp. and many remains of archaeocete whales (Basilosauridae). At least 48 species of selachians are presently identified; many of them are new and others are recorded in the late Middle Eocene (Bartonian) and Late Eocene (Priabonian) of Wadi Al-Hitan (Egypt) or Wadi Esh-Shallala Formation (Jordan) as in other African localities (e.g. Otodus cf. sokolowi, ‘Cretolamna’ twiggsensis, Xiphodolamia serrata, Misrichthys stromeri, Hemipristis curvatus, Galeocerdo cf. eaglesomi, Propristis schweinfurthi), probably indicating a Late Eocene age for unit 2 of the bedrock successions. The evolutionary trend noticeable on the proboscidean tooth is in agreement with such an assumption, by comparison with the close relative species known from the Eocene of Egypt, Libya and Algeria. Indeed, the faunal associations from the Dakhla area clearly demonstrate the erroneous age of these deposits, previously thought to be Mio-Pliocene. It suggests a correlation in age (late Middle Eocene–Late Eocene) and a similar environment with the famous marine deposits from Egypt and Jordan. It opens new opportunities to understand the biogeography and the surprising similarity of landscape between West and Northeast Africa during the Bartonian–Priabonian period.

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20

Cumentas, Jersey R., Lefrand Manoppo, and Johnny Budiman. "Komposisi hasil tangkapan soma darape di perairan pantai Desa Bajo Kecamatan Tatapaan Kabupaten Minahasa Selatan." JURNAL ILMU DAN TEKNOLOGI PERIKANAN TANGKAP 2, no. 3 (2016). http://dx.doi.org/10.35800/jitpt.2.3.2016.11448.

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ABSTRACT Soma darape is a traditional net fishing gear that still operated in Amurang Bay because of simple in construction, relatively inexpensive, and easy to operate using a small boat. The operation, however, sometimes is done in damaging ways to fish resources and the environment. Therefore, this research aims to study the species and composition of catches of soma darape, as well as assessing the legal size of catches. This research was done in coastal waters near mangrove of Bajo Village, Tatapaan District, South Minahasa Regency in June 2015; based on descriptive method. The catch consisted of 19 species, and the predominant species (≥ 20) were Scatophagus argus (42), Tylosurus crocodiles (33), Carangoides ferdau (27), Scylla serrata (26), Leiognathus smithursti (21) and Terapon jarbua (20). There were 6 species that have a legal size, namely Terapon jarbua (1), Scatophagus argus (18), Siganus canaliculatus (3), Lutjanus fulvus (5), Sillago analysts (16) and Scylla serrata (1). Of the total catch, only 17.89% was legal size and 82.11% was not legal size. Keywords: soma darape, gill net, catch composition, Amurang Bay ABSTRAK Soma darape merupakan alat tangkap jaring tradisional yang masih dioperasikan di Teluk Amurang karena konstruksinya sederhana, relatif murah dan mudah dioperasikan dengan perahu ukuran kecil. Tetapi kadang-kadang pengoperasiannya dilakukan dengan cara-cara yang bersifat merusak sumberdaya ikan dan lingkungan. Oleh karena itu penelitian ini dilakukan untuk mempelajari jenis dan komposisi hasil tangkapan soma darape; serta menilai ukuran legal hasil tangkapan. Penelitian ini dilakukan di perairan pantai dekat mangrove Desa Bajo, Kecamatan Tatapaan Kabupaten Minahasa Selatan pada bulan Juni 2015; yang didasarkan pada metode deskriptif. Hasil tangkapan terdiri dari 19 spesies, dan spesies yang dominan (≥ 20 ekor) secara berturut-turut adalah ikan Scatophagus argus (42 ekor), Tylosurus crocodiles (33 ekor), Carangoides ferdau (27 ekor), Scylla serrata (26 ekor), Leiognathus smithursti (21 ekor) dan Terapon jarbua (20 ekor). Hanya 6 spesies yang memiliki ukuran legal tangkap, yaitu Terapon Jarbua (1 ekor), Scatophagus argus (18 ekor), Siganus canaliculatus (3 ekor), Lutjanus fulvus (5 ekor), Sillago analis (16 ekor) dan Scylla serrata (1 ekor). Secara total hasil tangkapan, hanya 17,89% yang layak tangkap dan 82,11% tidak layak tangkap. Kata-kata kunci: soma darape, jaring insang, komposisi tangkapan, Teluk Amurang

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21

Apine, Elina, Praveen Rai, Madhu K. Mani, et al. "Comparative analysis of the intestinal bacterial communities in mud crab Scylla serrata in South India." MicrobiologyOpen 10, no. 2 (2021). http://dx.doi.org/10.1002/mbo3.1179.

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22

Mandal, Amit, S. K. Das, and Amit Majumder. "Studies on physico-chemical environment and management of crab (Scylla serrata) farming in 24 Parganas (West Bengal)." Indian Journal of Animal Research, of (September 28, 2017). http://dx.doi.org/10.18805/ijar.b-3423.

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Management practices and environmental quality of the crab (Scylla serrata) farming ponds in Gosaba and Basanti blocks, 24 Parganas (South), West Bengal has been investigated. Split bamboo fenced rectangular culture units are preferred by over 70% of the farmers with highly variable stocking density. Total inorganic nitrogen and BOD increased with the increasing biomass of the crabs in both the sites. Salinity, total alkalinity and hardness played direct roles in body weight gain and survival rate. Water salinity of 17.50 to 20.0 ppt and hardness upto 1000 mg l-1 were found to be optimal for body weight gain of the cultured crabs.

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23

Reinecke, Adriaan J., Sophia A. Reinecke, and Naomi P. Mdzeke. "’n Vergelykende ondersoek na die akkumulering van metale in die mosselkrewel (Tetraclita serrata) en die swartmossel (Choromytilis meridionalis) in Valsbaai, Suid-Afrika." Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 33, no. 1 (2014). http://dx.doi.org/10.4102/satnt.v33i1.1181.

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The development of methods to monitor the South African coastal waters offer major challenges. Knowledge and availability of suitable species that may serve as biomonitors will be valuable to obtain information to support good management decisions. It is therefore important to identify local species that show the basic characteristics required for biomonitoring. The aim of this study was to compare, as part of a wider seasonal field study of metals in the intertidal zone of False Bay, South Africa, the body loads of copper (Cu), nickel (Ni), lead (Pb), cadmium (Cd) and zinc (Zn) in the black mussel (C. meridionalis) and the barnacle (T. serrata), and to compare these with environmental concentrations. Also to draw conclusions about the animals’ relative abilities to accumulate priority metals. Specimens of both species were collected over several seasons at different points in False Bay and analysed chemically. The mean body load (soft tissue and shell) of metals was higher in the black mussel than in the barnacle during all seasons. A comparison between the body loads and environmental concentrations in water and sediment showed that the priority metals Cd, Ni and Pb are accumulated strongly by both C. meridionalis and T. serrata. The mean Cd body loads varied between 6.43 µg/g and 14.73 µg/g for the various seasons but was not statistically significantly different between seasons. Metal concentrations were in most cases highest during winter. Multiple regression analysis showed a strong correlation between body load of metals in the black mussel and the environmental concentration for most seasons, which indicates that the black mussel can be useful as an active rather than a passive biomonitor. The concept of biomonitoring has merit because it may show long-term tendencies, but it does not offer an absolute measure of immediate, varying pollution levels. It could serve as an additional management tool in a national marine programme for the protection of the intertidal zone’s biodiversity.

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