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Amino acid metabolism and requirement in teleost during their early life stages and implications in fish formulated diets

Zhang, Yongfang
http://rave.ohiolink.edu/etdc/view?acc_num=osu1199374737

Abstract Details

2008, Doctor of Philosophy, Ohio State University, Food Science and Nutrition.
The purposes of this dissertation are to (1) study the utilization of dietary amino acids in teleost fish during early life stages, (2) investigate the effect of indispensible amino acids (IDAA) imbalanced diets on young teleosts in terms of their growth and the concentrations of whole body (or muscle) free amino acids. In the first set of experiments, we evaluated the utilization of synthetic dipeptide-based, FAA-based diets in early life stages of stomachless (common carp), or stomach possessing-fish (rainbow trout or pacu). A live feed organism (Artemia salina nauplii) or casein-gelatin-based diet was used as protein control. Our results demonstrated that synthetic dipeptide-based diets but not FAA-base diet can sustain young rainbow trout and pacu optimal growth. On the contrary, neither synthetic-base or FAA-based diets can be utilized by common carp larvae. In another set of experiments, we examined the effect of IDAA-imbalanced diets on juvenile teleost, and tested IDAA imbalance/complementary feeding strategy. In the experiment 1, juvenile midas (Amphilophus citrinellum) were fed with one of the four diets. They were: casein-gelatin-based diet (protein control), free amino acid-based diet (FAA control), and two IDAA-imbalanced diets, (-)Lys (Lys, His, Ile, Phe and Trp were omitted) and (–)Arg diet (Arg, Thr, Val, Leu and Met were missing). We found that fish fed with IDAA deficient diets had significantly lower mean weights than fish fed the FAA-based or protein-based diets after 16 days. However, these former groups of fish had significantly higher instantaneous feed intake than the fish fed the protein-based diet. In the experiment 2, juvenile midas were provided with IDAA-imbalanced diets using several different feeding strategies. The principle was that within a 2-day frame, all fish got the same amount of dietary IDAA. The results showed that juvenile midas body weight gain, calculated on the weekly basis, improved significantly in all imbalanced/complimentary diet treatment groups after 32 days of feeding. We concluded that there was no anorectic response to IDAA deficient diets in juvenile midas. The sequential use of disproportionate AA diets may be a useful strategy to eliminate the negative effect of IDAAs deficient diets (plant proteins-based) in fish growth.
Dabrowski Konrad (Advisor)
175 p.
amino acid; metabolism and requirement; teleost; early life stages

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Citations

  • Zhang, Y. (2008). Amino acid metabolism and requirement in teleost during their early life stages and implications in fish formulated diets [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1199374737

    APA Style (7th edition)

  • Zhang, Yongfang. Amino acid metabolism and requirement in teleost during their early life stages and implications in fish formulated diets. 2008. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1199374737.

    MLA Style (8th edition)

  • Zhang, Yongfang. "Amino acid metabolism and requirement in teleost during their early life stages and implications in fish formulated diets." Doctoral dissertation, Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1199374737

    Chicago Manual of Style (17th edition)

osu1199374737
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This open access ETD is published by The Ohio State University and OhioLINK.