Predição da composição corporal e exigências líqüidas de macrominerais para ganho de peso de chinchila (Chinchilla lanigera) Body composition prediction and net macroelements requirements (Chinchilla lanigera)

Abstract

Foram determinados os conteúdos corporais e as exigências líquidas para ganho de peso de corpo vazio e ganho de peso vivo em matéria mineral (MM), fósforo (P), potássio (K) e magnésio (Mg) para a espécie (Chinchilla lanigera). Foram abatidos 18 animais (seis machos e seis fêmeas em média com 750 dias de idade e seis animais juvenis de 40 dias de vida). Foi feito um teste de comparação de médias para as composições das diferentes categorias animal. Foram ajustadas equações logarítmicas da quantidade corporal de MM, P, K e Mg, em função do logaritmo do peso corporal vazio. As exigências líquidas em MM, P, K e Mg foram obtidas por derivação das equações de predição da composição corporal. As proporções corporais de matéria seca e de matéria mineral alteraram-se com o avanço da idade das chinchilas. Os animais juvenis apresentaram (PBody composition and net requirements for empty body weight gain for mineral matter (MM), Phosphorous (P), potassium (K) and magnesium for chinchilla were determined. Eighteen animals (6 males, 6 females, 750 days old and six young animals 40 days old) were slaughtered. Minerals body content of different animals categories were compared and logarithmic equations were adjusted between minerals content and empty body weight. Body composition and net requirements for empty body weight gain for mineral matter (MM), Phosphorous (P), potassium (K) and magnesium for chinchilla were determined. Eighteen animals (6 males, 6 females, 750 days old and six young animals 40 days old) were slaughtered. Minerals body content of different animals categories were compared and logarithmic equations were adjusted between minerals content and empty body weight. Net requirements for MM, P, K and Mg were estimated through derivation of these equations. The body concentrations of dry and mineral matter changed with age. Younger animals had lower concentration of dry matter and higher concentration of minerals than the adults did. The body content and net requirements for empty body weight gain of MM, P, K and Mg increased as body weight varied from 100 to 400 g, remaining constant afterwards.

Keywords

• corpo vazio
• exigências minerais
• pele
• empty body
• mineral requirements
• skin