http://hdl.handle.net/10862/3203 Proceedings of the International Seminar-Workshop on Mud Crab Aquaculture and Fisheries Management, 10 - 12 April 2013 2026-04-06T11:18:25Z http://hdl.handle.net/10862/3218 Proceedings of the International Seminar-Workshop on Mud Crab Aquaculture and Fisheries Management, 10-12 April 2013, Tamil Nadu, India Quinitio, Emilia T.; Estepa, Fe Dolores P.; Thampi Sam Raj, Yohannan C.; Mandal, Anup 2015-01-01T00:00:00Z http://hdl.handle.net/10862/3205 Fisheries, cultivation and research aspects of mud crab (Genus Scylla) in China Wang, Gui-Zhong Quinitio, Emilia T.; Estepa, Fe Dolores P.; Thampi Sam Raj, Yohannan C.; Mandal, Anup Mud crabs are distributed only along the coastal areas of southeast China. Of the four Scylla species found in China, Scylla paramamosain is the dominant species. The annual wild catch of mud crabs in mainland China was 60,000-70,000 mt. The highest annual production from farming was 120,000 mt. The main species cultured is S. paramamosain. Fattening (involves the feeding of immature female crabs until their ovaries become mature), polyculture and monoculture are commonly practiced. Farming is done in earthen ponds and pens in intertidal zone and mangrove area. The seeds for farming are mostly from the wild and only about 10% are sourced from the hatchery. Occurrence of diseases and differences in the population are the main problems in mud crab farming in China. At present, research activities on mud crab that are being undertaken include reproductive biology, hatchery and farming technology. Further research on the prevention of diseases and development of formulated diets (ingredient selection, nutritional requirements, pellet size, shape and stability) are necessary. 2015-01-01T00:00:00Z http://hdl.handle.net/10862/3215 Culture of Scylla serrata (Forskal) in cement ponds Kotiya, A. S.; Solanki, J. B.; Akolkar, N. G. Quinitio, Emilia T.; Estepa, Fe Dolores P.; Thampi Sam Raj, Yohannan C.; Mandal, Anup Male and female Scylla serrata juvenile crabs were stocked separately in cement ponds (14 x 8 x 0.8 m; 90 m3) and reared for 90 days. The study was conducted at the Fisheries Research Station, JAU. Okha, Gujarat. The crabs were fed trash fish and Trochus spp. The survival rates of male and female crabs were higher in Run 1 at 66.11% and 45.55%, respectively, than in Run 2 at 13.9% and 6.1%, respectively. The mean body weights of males (1,704 g) and females (994.5g) in Run 1 were higher compared to those in Run 2 (381.2 g for males and 104.5 g for females). However, there were no significant differences (P>0.05) in the average daily weight gain of 0.19 g day^-1 for males and 0.13 g day-1 for females in Run 1 and 0.16 g day-1 for males and 0.13 g day^-1 for females in Run 2. The water parameter levels were within the optimum ranges for mud crab culture. The results indicate that it is not commercially viable to grow juveniles to market size in cement ponds based on the conditions in this study. 2015-01-01T00:00:00Z http://hdl.handle.net/10862/3204 Status of mud crab aquaculture in Bangladesh Islam, Md. Sherazul Quinitio, Emilia T.; Estepa, Fe Dolores P.; Thampi Sam Raj, Yohannan C.; Mandal, Anup Bangladesh has about 710 km of coastlines with 618,780 ha of mangrove tidal flats and 80,000 ha of associated areas which are suitable for brackishwater aquaculture. Mud crab culture has been practiced for many years in the coastal regions, particularly in southeast (Chittagong, Cox’s Bazar, Chokoria and Noakhali) and southwest (Khulna, Bagherhat and Satkhira) Bangladesh. In 1981, crab export became a stable business which ranked third among the fisheries export earnings. Bangladesh earns about US$6 million per year by exporting 1,500 metric tons of live mud crabs to Singapore, Hong Kong, China, Taiwan and Japan. Mud crab has been an incidental product arising from the culture of shrimps and other finfishes in ponds. Mud crabs were first exported in 1977 and since then farmers focused their attention to this species as an alternative to shrimp. However, mud crab farming is still dependent on wild resources. As the demand of mud crab in the international market increased, the number of crab gatherers also significantly increased. In addition, gathering of sub-adult crabs for fattening contributed to the depletion of adult crabs as breeders. Since the wild resources are under threat, management of resources and establishment of hatcheries are needed to sustain the mud crab industry in Bangladesh. 2015-01-01T00:00:00Z