Links between nutrition and the reproductive axis in a seasonal breeder, the mink (Mustela vison)

Abstract

This paper reviews some important links between nutrition and reproduction in a seasonal breeder, the mink (Mustela vison). The energetic costs of reproduction in mink are partly covered by mobilization of body fat reserves. A reduced food supply before the breeding season is detrimental to reproductive performance, and release of LH and ovulation may not occur in animals in extremely poor body condition. Nutritional flushing comprising a 2 week period of slightly restricted feeding, followed by ad libitum feeding for 4-5 days before the start of the mating season can influence reproductive performance positively. Reproductive endocrinology, ovulation and implantation rate, and early embryo development are affected by the modification of important metabolic signals including insulin, insulin-like growth factor I (IGF-I) and the thyroid hormones.