The biochemical composition (proteins, lipid, ash and moisture) of different parts of the body (gill, meat, egg) of fattened and natural mud crab Scylla serrata was determined. Twenty four samples of S. serrata (12 from wild & 12 from fattening farm) of different sizes and sexes (half of the sample is male) were used in this study. The mean protein and lipid contents are significantly (p<0.05) higher in fattened crabs than natural in natural crabs regardless of size and sexes. Moisture and ash were higher in natural crab than in fattened ones. The highest and lowest moisture content was noticed in gills and eggs in both natural and fattened crabs. Protein and lipid contents were comparatively higher in eggs than in other body parts. Female crabs contained high protein and lipid than males in both natural and fattened crabs. From the results of this study it may considered that fattened crab might be comparatively superior to natural crabs as they appear to provide higher levels of protein and fat for human nutrition.

The study was conducted in Khulna, Satkhira and Jhenaidah districts under Khulna division. The purpose was to know the training of fishery officers, fish and shrimp farmers in aqua farming. The main dissemination processes are training of farmers, farm demonstration, farmer to farmer visits, leaflets and pamphlets, audiovisuals etc. In Khulna district dissemination and extension services are application of government rules and regulations, strategic management, pond/shrimp farm visit, public awareness, training facilities, financial and other supports and some research projects also applied, training program, the number of trained fish farmers and trained shrimp farmers in 2009 were 790 and 5,754 respectively. In Satkhira district, different extension programs are applied, such as shrimp demonstration, fish sanctuary, pond/shrimp farm visit, training program, the number of trained Fish farmers and trained shrimp farmers in 2009 were 934 and 2110 respectively and community based fisheries management and some research projects. In Jhenaidah district DoF activities are training, in sadar upazila number of trained fisherman 34, baor management, identify floodplain and other involved communities, awareness campaign, frame survey, arrangement of fund, credit facilities, training program, production monitoring, identification of disadvantaged groups and pollution, disease diagnostic and its control.

T he Asian stinging catfish (Heteropneustes fossilis), locally known as Shing, is an omnivorous catfish endemic to Bangladesh. It is a high-valued native fish species in Bangladesh, with a high demand in local markets due to its delicious taste, nutritional values (Alok et al., 1993) and medicinal benefits (Froese and Pauly, 2012). Once widely distributed in the natural water bodies of the country, the population of stinging catfish has been declining

In animal breeding programmes, offspring fitness-related traits are largely influenced by various intrinsic biological factors of the parents and extrinsic ecological factors of the environment.Recent evidence revealed that parental (sire or dam) conditions had profound effects on offspring fitness-related traits which might be driven by genetic factors (Falica & Higgs, 2013;McGhee

This experiment was conducted for the development of induced breeding techniques of Aspidoparia jaya using the pituitary gland (PG) extract at the Floodplain Sub-station, BFRI, Santahar, Bogura, Bangladesh. Three breeding trials were conducted in May, June and July, 2021 where in May, none of the fish was ovulated. But breeding response was observed in June and July when we applied 8 mg (T1), 10 mg (T2) and 12 mg (T3) PG/kg body weight of female, and 5 mg (T1), 6 mg (T2) and 7 mg (T3) PG/kg body weight of male fish. Among all the treatments, significantly (P<0.05) highest breeding performance in terms of ovulation rate (78.87±1.71%), fertilization rate (79.39±1.40%) and hatching rate (86.98±1.20%) were observed in T3 treatment in the month of July when injected with single dose of 12 mg and 7 mg PG/ kg body weight of female and male, respectively. Significantly (P<0.05) higher values of mean gonado-somatic index were observed during June, July, August, December and January for females where July (10.15±1.50%) and January (9.55±1.30%) showed the highest peaks which indicated that they might be spawn twice in a year (from May to August and from December to January). The results from the present experiment reveals that induced breeding of Aspidoparia jaya, using PG extract is successful which might be helpful for the large-scale seed production of this species for the aquaculture as well as to conserve the species from being extinct from the biodiversity.