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Substitution of Silkworm Pupae （Bombyx mori） for Fish Meal in Broodstock Diets for Snakeskin Gourami （ Trichogaster pectoralis）

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Journal of Agricultural Science and Technology(A) 2011年第8期1卷 1341-1344页

作者： Orapint Jintasataporn S. Chumkam oratal jintasatapom Department of Aquaculture Faculty of Fisheries Kasetsart University Bangkok Thailand Faculty of Agricultural Technology Valaya Alongkorn Rajabhat University Thailand Department of Animal Science Faculty of Agriculture at Kampangsan Kasetsart University Kampangsan Campus Nakornprathom Thailand

Substitution of silkworm pupae （Bombyx mori） for fish meal in broodstock diets for snakeskin gourami （Trichogaster pectoralis） was conducted in order to evaluate the effect of silkworm pupae on feed digestibility and broodstock performance. Snakeskin gourami broodfish were fed with isocaloric diets （DE 3,000 a： 50 Kcal/kg） contained 32% crude protein. The levels of substitution were 0%, 50%, 75% and 100% of protein from fish meal （equal to 0%, 14.57%, 21.75% and 29.03% silk worm by weight）. The study was assigned in CRD with 4 treatments and 3 replications. Six hundred of snakeskin gourami with five-month old and average weight of 78.67 ± 2.15 g in female and average weight of 73.00 ± 2.49 g in male were stocked in 12 cages. Fifty fishes of 25 females and 25 males were reared in each cage and fed experimental diet for five months. The result indicated that protein digestibility of test diets were significantly decrease （P 〈 0.05） according to the level of silkworm pupae in diets where as the dry matter digestibility showed no significantly different （P 〉 0.05）. The growth performance and egg fecundity were significantly decreased （P 〈 0.05） according to the levels of silkworm pupae. In contrast, egg quality in term of fry number on first spawned, fingering number on first spawned were not significantly different （P 〉 0.05）. The survival rate of one month nursing fish on first spawned were significantly different （P 〈 0.05）. Hence, silkworm pupae could substitution for 50% of protein from fish meal （14.57% by weight） in snakeskin gourami broodstock diets without any adverse effect on egg quality.

关键词： Silkworm pupae fish meal snakeskin gourami broodstock diets

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