Amino Acid Profiles in the Furring Period of Mink (Mustela vison)

Animals utilise protein for maintenance, growth, reproduction and milk production. The ideal amino acid profiles (IAAP) for these purposes, are different and the profile changes during an animals growth period, as the maintenance requirement increases and that for growth decreases (i.e. Anon, 1987 and Rodehutscord et al., 1997). For fur bearing animals this is also influenced by the onset of winter fur growth.
It is known, that the AAP of milk or whole body, is a good basis for the determination of the IAAP (i.e. Kim & Lall, 2000).
The AAP, of the norm for mink (N) in the growing-furring period (Børsting & Clausen, 1996 and Børsting, 1998), and that of mink body and pelt (M) (Glem-Hansen & Hansen, 1981 and Chavez, 1980) shows considerable difference for certain amino acids. The AAP of the cat norm (C) (NRC, 1996) is relatively close to either that of N or that of M (Table 1).
A trial was carried out in the furring period to test the consequences on growth, fur quality and health, of diets having AAP’s, based on either M or C.