Domestication of the mud crab Scylla serrata
Quinitio, E.T.; Joy de la Cruz, J.; Eguia, M.R.R.; Parado-Estepa, F.D.; Pates, G.; Lavilla-Pitogo, C.R. (2011). Domestication of the mud crab Scylla serrata. Aquacult. Int. 19(2): 237-250. https://dx.doi.org/10.1007/s10499-010-9381-0 In: Aquaculture International. Springer: London. ISSN 0967-6120; e-ISSN 1573-143X, more Also appears in:Le Vay, L.; Zeng, C.; Sorgeloos, P. (Ed.) (2011). International Symposium on aquaculture, biology and management of commercially important crabs. Aquaculture International, 19(2). Springer: Dordrecht. 215-394 pp., more |  |
| Keywords | Domestication
Genetic diversity
Reproduction
Scylla serrata (Forskål, 1775) [WoRMS]
Brackish water | | Author keywords | Domestication; Husbandry; Reproductive performance; Scylla serrata;Genetic diversity; Generations |
| Authors | | Top | - Quinitio, E.T.
- Joy de la Cruz, J.
- Eguia, M.R.R.
| - Parado-Estepa, F.D.
- Pates, G.
- Lavilla-Pitogo, C.R.
| |
| Abstract | The significant decrease in wild mud crab population highlights the need to manage the resources and domesticate crabs. This paper presents the initial results of the domestication of mud crab Scylla serrata aimed at producing good-quality captive broodstock. The analysis of the genetic structure of the base population was done as a prerequisite for domestication. Adult S. serrata from the northern to southern parts of the Philippines (Cagayan, Camarines, Samar, and Surigao) were obtained for genetic diversity analysis and domestication. Analysis of molecular variance showed that differences in the genetic variability between the four populations were not significant. Moreover, no significant deviation from Hardy-Weinberg Equilibrium was observed in each sample population and even in pooled populations. Body weight was positively correlated with the carapace width. Second spawning occurred 41-46 days after the first spawning and 34 days from second to third spawning. However, there was a decrease in the number of zoea in repeat spawnings. Twenty-four first-generation (F-1) families were produced from the four sites. The duration from spawning of the base population (P-0) to attainment of broodstock size F-1 was 10-14 months. Four second-generation (F-2) families were produced after 11-12 months. Up to the F-2, crabs tested negative for six viruses: white spot syndrome virus, infectious hypodermal and hematopoietic necrosis virus, gill-associated virus, yellow head virus, Taura syndrome virus, and infectious myonecrosis virus. The reproductive performance of P-0 was comparable to the succeeding generations. Several families were obtained from one population in a year. However, due to the cannibalistic behavior of crabs, more space is required for the nursery and grow-out phase. The domestication of S. serrata is the first study done on any mud crab species in the Indo-west Pacific region. The initial results would serve as guide to understand and eliminate the barriers to mud crab domestication. The breeding technology developed from this study will support the production of good-quality seedstock for farming. |
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