Literaturdatenbank
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Nuangsaeng, B., & Boonyaratapalin, M. (2001). Protein requirement of juvenile soft-shelled turtle trionyx sinensis wiegmann. Aquaculture Research, 32(1), 106 ff.
Added by: Admin (17 Aug 2008 18:17:23 UTC) |
| Resource type: Journal Article BibTeX citation key: Nuangsaeng2001 View all bibliographic details  |
Categories: General Keywords: Ernährung = nutrition, Pelodiscus, Pelodiscus sinensis, Schildkröten = turtles + tortoises, Trionychidae, Trionyx Creators: Boonyaratapalin, Nuangsaeng Collection: Aquaculture Research |
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| Abstract |
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A study was conducted to determine the dietary protein requirement of the juvenile soft-shelled turtle Trionyx sinensis Wiegmann. Six isocaloric diets containing approximately 4.9 kcal g1 of gross energy and 30%, 35%, 40%, 45%, 50% or 55% of crude protein were fed to turtles weighing nearly 5.1 g each for a 14-week experimental period (n = 3). The turtles were raised in aquaria provided with a dry area for feeding and were fed to satiation twice a day. Feed consumption and body weight were determined every 2 weeks. There was a general increase in body weight with protein concentration of feed. After 6 weeks of feeding, the turtle fed 45% - 55% protein diets had significantly higher body weight than those fed 30% - 35% protein diets. At 14 weeks, the body weight and the feed conversion ratio with 45% protein diet were significantly better than with 30% and 35% protein diets, but were not significantly different compared with 50% and 55% protein diets. The protein and energy retention tended to increase with dietary protein, increasing from 30% to 45% and decreasing thereafter. Survival of turtles fed diets with 50% and 55% protein was significantly higher than those fed with 30% - 40% protein. The protein accretion increased with dietary protein concentration. A broken-line regression analysis of the final body weight indicated that a 46.48% dietary protein level optimally supports the performance of the juvenile soft-shelled turtle.
Added by: Admin |