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Induction of moulting in hatchery-reared mangrove crab Scylla serrata juveniles through temperature manipulation or autotomy

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วันที่
2019
ผู้เขียน
de la Cruz-Huervana, Joana Joy Y.
Quinitio, Emilia T.
Corre, Valeriano L.
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288
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นามธรรม
The effects of temperature and autotomy of chelipeds on survival, growth and moulting of mangrove crab (Scylla serrata) juveniles were investigated under laboratory conditions for 60 days. Hatchery‐produced crabs with 2.0–2.3 cm internal carapace width (1.7–2.2 g body weight) at intermoult stage were exposed to one of four temperature treatments (constant 29, 32 or 35°C, or ambient [24–31°C]) or subjected to cheliped autotomy. All crabs held at 35°C had 100% mortality due to incomplete moulting during first moult. The mean survival of crabs at termination was 58%, 64% and 50% for ambient temperature, 29 and 32°C respectively. Specific growth rate (SGR) of crabs in the ambient and 29°C were comparable but significantly lower than those at 32°C. The moult interval of the crabs was significantly shorter in treatments with constant water temperature of 29 and 32°C compared with ambient temperature. The survival of crabs with intact chelipeds was comparable with those with one or two autotomized chelipeds. Crabs with intact or one autotomized chelipeds had significantly higher SGR than crabs with both chelipeds autotomized in the first moult. On the second moult, however, high SGR was observed in crabs with two chelipeds autotomized. The moult interval was significantly shorter in the autotomized crabs compared with crabs with intact chelipeds. The results suggest that the optimum water temperature for rearing S. serrata juveniles ranges from 29 to 32°C. Likewise, autotomy of chelipeds can promote moulting without adversely affecting survival of crabs.
URI
http://hdl.handle.net/10862/3523
การอ้างอิง
de la Cruz-Huervana, J. J. Y., Quinitio, E. T., & Corre, V. L. (2019). Induction of moulting in hatchery-reared mangrove crab Scylla serrata juveniles through temperature manipulation or autotomy. Aquaculture Research, 50(10), 3000-3008. https://doi.org/10.1111/are.14257 
DOI
10.1111/are.14257
เรื่อง
aquatic crustaceans ASFA; growth rate ASFA; brackishwater crustaceans ASFA; behaviour ASFA; juveniles ASFA; water treatment ASFA; temperature ASFA; survival ASFA; water temperature ASFA; rearing techniques ASFA; body weight ASFA; moulting ASFA; marine crustaceans ASFA; autotomy ASFA; hatching ASFA; mangroves ASFA; temperature effects ASFA; Scylla serrata AGROVOC; Decapoda AGROVOC; Cheliped autotomy; Mangrove crab; hatcheries AGROVOC
Taxonomic term
Scylla serrata GBIF
คอลเลกชัน
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    Walton, Mark E.; Le Vay, Lewis; Lebata, Junemie H.; Binas, Joseph; Primavera, Jurgenne (Elsevier, 2006)
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    Induction of molting in hatchery-reared mud crab Scylla serrata juveniles through temperature manipulation or autotomy 

    Huervana, Joana Joy D. C. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2017)
    The effects of water temperature and autotomy of chelipeds on growth, survival and molting of mud crab, Scylla serrata, juveniles were investigated under laboratory conditions in separate experiments. Hatchery-produced ...
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    Updates on the larviculture of mud crab at SEAFDEC/AQD 

    Quinitio, Emilia T.; Huervana, Joana Joy D. C.; Virgula, Juliette C.; Parado-Estepa, Fe D. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2017)
    Although the mud crab (Scylla serrata) hatchery technology has been developed, issues such as high cost of production due to the need for additional facilities and labor for natural food culture, inconsistent survival rate ...

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