Captive breeding of mud crab Scylla serrata (Forskål, 1975) in Bangladesh

Content Provider	Semantic Scholar
Author	Hoq, E. Enamul Sein, Aung Kyaw Khan, Shahzad Kuli Debnath, Partho Pratim Kabir, Quazi Azm Kudrat E.
Copyright Year	2015
Abstract	Fully gravid mud crabs, Scylla serrata (230 to 360 g body weight; 7.5 to 10.25 cm carapace length) were bought from tidal floodplain of Mosehkhali, Cox's Bazar and transported to the Niribili Hatchery, Krjukhal, Ukhia, Cox's Bazar. Prior to stocking in the hatchery, the crabs were bathed in a 100 µl/l formalin solution for an hour. The crabs were housed in cemented cistern, equipped with treated sea water supply. They were held in 10 tonnes cemented tanks provided with sand as substrate and PVC pipe for shelter. Rearing water was supplied from nearby sea water canal with tidal flow and pass through a complete water filtration system (sea water> siltation tank> quartz filter> sand filter> mollusk shell filter> treatment tank> curtis filter> UV filter> storage tank etc.) with central aeration system. The water tanks were chlorinated before use. Water temperature in the rearing tank was between 28.5o-30 0 C, salinity between 28-30 ppt, pH 7.8-8.1 and alkalinity was 153 mg/L. Stocked crabs were fed fresh marine squid or flat fish alternately twice daily at 3% body weight. Excess feeds were siphoned out prior to feeding. After 10-15 days of acclimation, unilateral eyestalk ablation of berried crab was applied to induce spawning. After eyestalk ablation, ablated crabs were again bathed in a 100 µl/l formalin solution for one hour and transferred to 300-L fibre glass tank for individual crab with aeration. Daily management consisted of siphoning out waste material from the tank bottom and controlling of temperature (30°C), salinity (30 ppt) and ammonia and nitrite levels. One to two days prior to hatching, the gravid mud crabs were moved to the laboratory of Marine Fisheries & Technology Station, Cox's Bazar and kept in 300-L fibre glass tanks with central aeration system. The laboratory was maintained proper bio-security with aeration system, enough lightening and pretreated sea water
Starting Page	295
Ending Page	299
Page Count	5
File Format	PDF HTM / HTML
DOI	10.3329/bjz.v42i2.23372
Volume Number	42
Alternate Webpage(s)	https://www.banglajol.info/index.php/BJZ/article/download/23372/16067
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article