Abstract
The present study was undertaken to determine the effects of polyunsaturated fatty acids (PUFAs) on enhanced maturation, spawning, embryonic and larval development of endangered Gangetic Mystus (Mystus cavasius). Fishes were collected from the Brahmaputra River, Mymensingh, Bangladesh and stocked in the cisterns. Treated group was provided supplemental diet enriched with 1% squid extracted lipids as a source of PUFAs four months whereas controlled group fed the same diet except PUFAs. In comparison with the control group, treated group exhibited higher reproductive performances in spawning trial. The fertilization rate (79.5±1.49), hatching rate (72.29±1.78) and survival rate (64.31±0.48) of offspring were significantly higher in treated group compared to control. Consequently, early embryonic and larval development was observed in the treated fishes. Therefore, the present study indicates the enhanced reproductive and developmental performances of (Mystus cavasius) owing to PUFAs supplementation in diet.
 Asian J. Med. Biol. Res. December 2020, 6(4): 641-649
Highlights
Mystus cavasius (Hamilton-Buchanan, 1822) is a catfish under family Bagridae of order Siluriformes
Inclusion of polyunsaturated fatty acids (PUFAs) in the diet proofed with the highest gonadosomatic index (GSI), which gave a sign on fish maturation (Hossen et al, 2014a)
The fatty acid composition of eggs is directly impacted by the n-3 highly unsaturated fatty acid (HUFA) content of the broodstock diet
Summary
Mystus cavasius (Hamilton-Buchanan, 1822) is a catfish under family Bagridae of order Siluriformes. It is commonly known as Gangetic Mystus. It is a favorite food fish to the consumers and has a great demand fetching high prices in the market. It can withstand harsh environmental conditions, such as low oxygen, wide range of temperature fluctuations (Akteruzzaman et al, 1991). Inclusion of PUFAs in the diet proofed with the highest gonadosomatic index (GSI), which gave a sign on fish maturation (Hossen et al, 2014a). The percentage of morphologically normal eggs (as a parameter to determine egg viability) has been found to increase with an increase in the n-3 PUFA
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