Variación de indicadores nutricionales en "yacares" (Caiman latirostris) alimentados con distintas dietas en un criadero de Chaco, Argentina

Barboza, N. N.; Panseri, A. F.; Mussart, N. B.; Koza, G. A.; Coppo, J. A.
May 2011
Revista Veterinaria;2011, Vol. 22 Issue 1, p43
Academic Journal
The objective of the assay was to inve tigate the growth speed (liveweight, dimensions) and the blood indicators (metabolism, nutritional state) in caimans fed on different diets, considering the different seasons of the year. Forty sub- adults C. latirostris clinically healthy specimens, 50% each sex, were divided homogeneously in two groups of20 animals each and assigned respectively to diets A (38% protein, 5% fat, 1.2% calcium, 0.8% phosphorous) and B (64% protein, 5% fat, 4.5% calcium, 2.7% phosphorous). Both groups also received meat flour (49% protein, 13% fat, 5.1% calcium and 4.4% phosphorous). An initial blood sample (control) and then four samplings, one for each season, were obtained. Multivariate statistics showed high values of glucose, triglycerides, urea, creatinine, inorganic phosphorous, potassium, alkaline phosphatase, aspartate aminotransferase and mean corpuscular volume, registered in both groups during spring- summer. During autumn- winter, high levels of erythrocytes, total protein, magnesium, uric acid and gammaglutamyl transferase, were verified. The low concentrations of leukocytes, enzymes, globulins, uric acid and electrolytes allowed to discard the existence of organic or metabolic alterations. Diet A, in spite of its lower proportion of proteins, calcium and phosphorous, caused animals to gain higher finalliveweights and bigger corporal dimensions (total longitude, muzzle- tail longitude, head longitude, head wide and thoracic perimeter). Animals also showed higher concentration of nutritional blood indicators, such as total proteins, albumin, urea, glucose, fructosamine, hematocrit and hemoglobin. For group B, higher concentrations (p<0.05) of creatinine, calcium, phosphorous, magnesium and lipids (triglycerides, total cholesterol and cholesterol bound to lipoproteins of high and low density), were verified. These findings suggest that, when planning caiman feeding systems, it is not only important to determine the amount of nutrients but also their quality, determining their digestibility, amino acids proportion and the bioavailability of minerals.


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