Abstract/Details

Quantification of the critical dietary requirements in the sulfur amino acid catabolic pathway in juvenile tilapia


2000 2000

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Abstract (summary)

In present study, four experiments were conducted to reevaluate the dietary requirements for methionine, choline, and phosphatidylcholine for juvenile Oreochromis niloticus. The ability of betaine to spare the requirement for dietary choline was also investigated. In Experiment 1, graded additions of L-methionine significantly affected weight gain, feed efficiency and serum methionine concentrations of juvenile tilapia, whereas survival and liver lipid concentrations were not significantly affected. The methionine requirement for tilapia with an initial weight of 3 g was 5 g methionine/kg dry diet. In Experiment 2, weight gain and feed efficiency of tilapia was significantly affected by dietary methionine while liver lipid concentration and serum methionine were not. The choline requirement for 3 g tilapia was 3 g choline/kg dry diet. In Experiment 3, addition of phosphatidy1choline significantly affected weight gain and feed efficiency of juvenile tilapia, while survival and total liver lipid concentrations were not significantly affected. The phosphatidylcholine requirement for tilapia with an initial weight of 12.1–12.7 g was 15 g phosphatidylcholine/kg dry diet. Weight gain and feed consumption were significantly affected in Experiment 4 by the dietary betaine. Betaine was able to replace the dietary requirement for choline in tilapia with an initial weight of 9.6 g. Data in the first two experiments was analyzed using a factorial design. In Experiments 3 and 4 data was analyzed by one-way ANOVA. Results from this study will be useful in least costs diet formulation for tilapia and support the introduction of tilapia as an animal model for homocysteine study.

Indexing (details)


Subject
Livestock;
Aquaculture;
Fish production
Classification
0475: Livestock
0792: Aquaculture
0792: Fish production
Identifier / keyword
Biological sciences; Choline; Methionine; Oreochromis niloticus; Phosphatidylcholine; Sulfur amino acid; Tilapia
Title
Quantification of the critical dietary requirements in the sulfur amino acid catabolic pathway in juvenile tilapia
Author
Kasper, Craig Stephen
Number of pages
107
Publication year
2000
Degree date
2000
School code
0183
Source
DAI-B 62/11, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780493460635, 0493460632
Advisor
Brown, Paul B.
University/institution
Purdue University
University location
United States -- Indiana
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3033109
ProQuest document ID
275887065
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/275887065/abstract
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