Concentrations of hormones, glucose, triglycerides and free fatty acids in the plasma of broiler chickens selected for weight gain or food conversion
Autor: | M Herremans, Fr Leenstra, Eddy Decuypere, Johan Buyse, Luc Berghman, G Beuving |
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Rok vydání: | 1991 |
Předmět: |
Blood Glucose
Male medicine.medical_specialty Triiodothyronine Reverse medicine.medical_treatment Breeding Fatty Acids Nonesterified Biology Weight Gain Eating Sex Factors Internal medicine Blood plasma medicine Animals Insulin-Like Growth Factor I Triglycerides Analysis of Variance Triiodothyronine Insulin Age Factors Broiler General Medicine Somatomedin Hormones Prolactin Thyroxine Endocrinology Growth Hormone Body Composition Female Animal Science and Zoology medicine.symptom Chickens Weight gain Food Science Hormone |
Zdroj: | British Poultry Science. 32:619-632 |
ISSN: | 1466-1799 0007-1668 |
DOI: | 10.1080/00071669108417387 |
Popis: | 1. The concentrations of growth hormone (GH), insulin-like growth factor I (IGF-I), thyroxine (T4), triiodothyronine (T3), reverse-triiodothyronine (rT3), triglycerides (Tri), free fatty acids (FFA) and glucose (Glu) were determined at 2, 4 and 6 weeks of age in blood plasma of male and female chickens of broiler lines selected for body weight (GL) or food conversion (FC). 2. Plasma concentrations measured in the same animal over a 24 h or a 2 week interval were not significantly correlated with each other. For different traits measured in the same plasma sample only the correlation between T4 and rT3 differed significantly from zero. 3. All traits were dependent on age. Line and sex effects were significant (P less than 0.05) for GH, T4, Tri, FFA and Glu. Additionally, line significantly influenced the plasma T3/T4 ratio and sex influenced plasma rT3. Interactions between line, sex and/or age were seldom significant. 4. Within line and sex, GH (at 6 weeks of age) and T3 (at 4 weeks of age) were negatively, and IGF-I and Tri (both at 6 weeks of age) positively correlated with the amount of abdominal fat at 6 weeks of age. No significant correlation between body weight at 2, 4 or 6 weeks of age and any of the plasma traits was found. |
Databáze: | OpenAIRE |
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