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Quality and colour of melatonin—and bromocriptine-induced winter fur growth in mink (Mustela vison) given a supplemented diet

Published online by Cambridge University Press:  02 September 2010

O. D. Slayden ,
J. Adair  and
F. Stormshak
O. D. Slayden
Affiliation:
Department of Animal Science, Oregon State University, Corvallis, Oregon 97331, USA
J. Adair
Affiliation:
Department of Animal Science, Oregon State University, Corvallis, Oregon 97331, USA
F. Stormshak
Affiliation:
Department of Animal Science, Oregon State University, Corvallis, Oregon 97331, USA
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Abstract

An experiment was conducted to evaluate the effects of diet on fur colour and quality of bromocriptineand melatonin-induced winter pelage in mink. At weaning, 90 standard dark female kit mink were assigned randomly to one of two dietary regimens. Diet 1 (no. = 30) was a basal ranch mink diet, and diet 2 (no. = 60) was the basal diet, supplemented with liver and eggs. On 26 June 1986, mink given each diet were assigned to treatment (no. = 15) and control groups (no. = 15). Animals receiving diet 1 were treated with 120 mg melatonin implants (silastic) while those given diet 2 were treated with 120 mg melatonin implants, 60 mg bromocriptine pellets, or 60 mg bromocriptine pellets plus 18·6 mg melatonin implants (silastic). Control groups on each diet received no implants. Subsequently, fur growth was measured at biweekly intervals. Mink treated with 120 mg melatonin, 60 mg bromocriptine, and 60 mg bromocriptine plus 18·6 mg melatonin all moulted 1 month earlier than controls and exhibited significantly greater fur growth during the months of August and September (P < 0·05). Mink implanted with 120 mg melatonin, and bromocriptine plus melatonin were considered to be in fully prime pelage by mid October and were pelted by October 23. Mink receiving bromocriptine alone were not considered to be in prime pelage in October and were pelted in December with controls. Neither diet supplementation with liver and eggs, nor treatment to induce early fur growth had an effect on fur colour or quality. It was also concluded that treatment of mink with bromocriptine may not completely mimic the effect of exogenous melatonin on winter fur growth.

Type
Research Article
Information
Animal Production , Volume 49 , Issue 1 , August 1989 , pp. 123 - 127
Copyright
Copyright © British Society of Animal Science 1989

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References

REFERENCES

Allain, D., Martinet, L. and Rougeot, J. 1981. Effect of melatonin implants on changes in the coat, plasma prolactin level and testis cycle in the mink (Mustela vison). In Photoperiodism and Reproduction (ed. Ortavant, R., Pelletier, J. and Ravault, J. P.), pp. 263–271. Institut National de la Recherche Agronomique, Paris.Google Scholar
Allain, D. and Rougeot, J. 1980. Induction of autumn moult in milk (Mustela vison Peale and Beauvois) with melatonin. Reproduction, Nutrition, Developpement 20: 197–201.CrossRefGoogle Scholar
Glem-Hansen, N. 1980a. The protein requirements of mink during the growth period. 1. Effect of protein intake on nitrogen balance. Ada Agriculturae Scandinavica 30: 336–344.CrossRefGoogle Scholar
Glem-Hansen, N. 1980b. The protein requirements of mink during the growth period. 2. Effect of protein intake on growth rate and pelt characteristics. Acta Agriculturae Scandinavica 30: 345–348.CrossRefGoogle Scholar
Martinet, L., Allain, D. and Meunier, M. 1983. Regulation in pregnant mink (Mustela vison) of plasma progesterone and prolactin concentrations and regulation of onset of the spring moult by daylight ratio and melatonin injection. Canadian Journal of Zoology 61: 1959–1963.CrossRefGoogle Scholar
Martinet, L., Allain, D. and Weiner, C. 1984. Role of prolactin in the photoperiodic control of moulting in the mink (Mustela vison). Journal of Endocrinology 103: 9–15.CrossRefGoogle ScholarPubMed
Martinet, L., Meunier, M. and Allain, D. 1981. Control of delayed implantation and onset of spring moult in mink (Mustela vison) by daylight ratio, prolactin and melatonin. In Photoperiodism and Reproduction (ed. Ortavant, R., Pelletier, J. and Ravault, J. P.), pp. 253–261. Institut National de la Recherche Agronomique, Paris.Google Scholar
Martinet, L., Ravault, J. P. and Meunier, M. 1982. Seasonal variations in mink (Mustela vison) plasma prolactin measured by heterologous radioimmunoassay. General and Comparative Endocrinology 48: 71–75.CrossRefGoogle ScholarPubMed
Rose, J., Oldfield, J. and Stormshak, F. 1987. Apparent role of melatonin and prolactin in initiating winter fur growth in mink. General and Comparative Endocrinology 65: 212–215.CrossRefGoogle ScholarPubMed
Rose, J., Stormshak, F., Oldfield, J. and Adair, J. 1984. Induction of winter fur growth in mink (Mustela vison) with melatonin. Journal of Animal Science 58: 57–61.CrossRefGoogle ScholarPubMed
Rose, J., Stormshak, F., Oldfield, J. and Adair, J. 1985. The effects of photoperiod and melatonin on serum prolactin levels of mink during autumn moult. Journal of Pineal Research 2: 13–19.CrossRefGoogle Scholar