Effects of dietary lipidic charge in the concentration of bovine plasmatic lipids and lipoproteins. Its influence on the saturation degree of fatty acids' storaged lipids.
To estimate physiological changes due to added fat in bovine diet, whole cottonseed (19% lipids) was furnished to half-breed zebu cattle during 7 months. Thirty animals had increased its dietary lipidic charge in 2.6% (lot S), thirty were used as controls (lot C) and other two bovines were hyper-dosed with 7.9% added fat (lot H). Weight, clinical signs and plasmatic values of total cholesterol (TC), triglycerides (TG), lipoproteins (LP) and other biochemical parameters were monthly controlled. At the end of the assay the steers were sacrificed and the quality of meat and fat was evaluated. The initial levels of TC were statistically homogeneous in all groups (mean = 1.0 g/l); they remained without modifications in C (1.53 g/l), but they had increased progressively in supplemented animals. At the end of the work TC was greater in H (3.95 g/l) than in S (2.44 g/l). Latest TG (initial mean = 0.30 g/l) also were greater in H (0.74 g/l) than in S (0.71 g/l). The lipoproteinogram stayed inalterable in C, meanwhile alpha LP were increased and beta LP were decreased in animals on which the dietary lipidic charge had been increased. The weight's gain/animal/day (X) was 130 g (C), 290 g (S) and 88 g (H). The general physiological condition was deteriorated in the last lot. After comparing lots C and S, results indicated that beefsteaks in the last group were heavier (2.45 vs. 2.33 kg), with more lipids (0.47 vs. 0.36 kg) and major fat veined proportion (1.40 vs. 1.25%). The stored lipids showed high saturation degree in S, with increment in the mean percentage of stearic acid (28.6%).(ABSTRACT TRUNCATED AT 250 WORDS)
Coppo
J A
JA
Cátedra de Fisiología, Facultad de Ciencias Veterinarias, Universidad Nacional del Nordeste, Corrientes, Argentina.
D000818:Animals; D001835:Body Weight; D002417:Cattle / Q000097:blood; D002784:Cholesterol / Q000097:blood; D004041:Dietary Fats / Q000008:administration & dosage*; D005231:Fatty Acids, Unsaturated / Q000097:blood; D005260:Female; D008055:Lipids / Q000097:blood*; D008074:Lipoproteins / Q000097:blood; D008297:Male; D008460:Meat / Q000032:analysis; D014280:Triglycerides / Q000097:blood
D004041:Dietary Fats; D005231:Fatty Acids, Unsaturated; D008055:Lipids; D008074:Lipoproteins; D014280:Triglycerides; D002784:Cholesterol