Energy and protein intake in relation to growth of suckling black-tailed deer fawns
1980; NRC Research Press; Volume: 58; Issue: 7 Linguagem: Inglês
10.1139/z80-187
ISSN1480-3283
Autores Tópico(s)Genetic and phenotypic traits in livestock
ResumoMilk and solid food consumption of energy and protein were measured in suckling Odocoileus heminonus columbianus fawns to 3 months of age. Fawns 7 to 10 days old consumed 175 g milk/kg 0.75 ∙body weight∙day −1 which declined to 40 g/kg 0.7S ∙day −1 by 61 to 70 days. Mean daily digestible energy intake of milk and solids was 247 kcal/kg 0.75 ∙day −1 (1 cal = 4.1868 J) and protein intake was 10.7 g/kg 075 ∙day −1 . Fawns started effective eating of solids around 30 days and by 90 days >80% of their energy intake was from solids. Some does continued to lactate for another 4 months, indicating that the metabolic and behavioural aspects of weaning can be separated in time. Growth for the first month of age was positively correlated with milk consumption, and growth rates up to 1,2, and 3 months were inversely correlated with birth weights but not to 4 months or older. Growth rates to 2 months were positively correlated with maternal growth rates to the same ages suggesting a genotypic and (or) prenatal effect on growth of fawns.
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