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. 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.
empty body; mineral requirements; skin
