Protein and Energy Relationships in the Diet of the American Alligator ( Alligator mississippiensis )
The Journal of Nutrition, ISSN: 0022-3166, Vol: 120, Issue: 7, Page: 775-785
1990
- 32Citations
- 39Captures
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Metrics Details
- Citations32
- Citation Indexes32
- 32
- CrossRef21
- Captures39
- Readers39
- 39
Article Description
First-year alligators ( Alligator mississippiensis ) averaging 377–857 g body weight were fed diets containing various levels of protein, fat and carbohydrate. In experiment 1, nine diets arranged in a centrally rotatable composite design contained 0–36% extruded corn and 4–20% total fat. Response surface analysis predicted maximum responses in performance criteria at 6.3–18.8% corn and 15.8–27.4% fat. Corn inclusion at up to 27–36% of diet resulted in equal or improved performance compared to carbohydrate-free diets of equal fat content. Energy digestibility averaged 84.3%. Protein digestibility averaged 86.7%. Maximum responses in performance criteria were predicted at 42.5–48.7% digestible protein and 4367–4421 kcal/kg digestible energy. In two additional experiments, alligators were either fasted or fed for various numbers of days/week. Carbohydrate-supplementation of high protein diets led to equal or significantly improved performances. Performance was maximized by feeding the alligators 5–6 d/w. Regression of body weight changes against energy and protein intake yielded estimates of daily maintenance requirements of 5.7–8.4 kcal and 0.49–0.89 g protein/kg live body weight. Dietary fat and carbohydrate in the forms and amounts fed to young alligators were well-utilized. Optimal digestible energy:crude protein ratios (8.2–10.9:1 kcal/g protein) were similar to those of other aquatic ectotherms of equal size.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0022316622175863; http://dx.doi.org/10.1093/jn/120.7.775; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0025280070&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/2366112; https://linkinghub.elsevier.com/retrieve/pii/S0022316622175863; https://dx.doi.org/10.1093/jn/120.7.775
Elsevier BV
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