Diet of Free Ranging American Mink (Neovison vison) in Denmark

Author:

Rørbæk René Worup1,Andersen Tobias Astell1,Pertoldi Cino12ORCID,Jørgensen Alex1,Pagh Sussie1ORCID

Affiliation:

1. Department of Chemistry and Bioscience—Section of Biology and Environmental Science, Aalborg University, Fredrik Bajers Vej 7, 9220 Aalborg, Denmark

2. Aalborg Zoo, Mølleparkvej 63, 9000 Aalborg, Denmark

Abstract

Non-native American mink (Neovison vison) is a widely spread predator in Denmark. The feral population in mainland Denmark consists of captive-born mink that escaped from fur farms and wild mink born in nature, whereas the population on Bornholm is almost all wild-born mink. In this study, the diets of feral mink in mainland Denmark and on the island of Bornholm are analyzed. The aim of this study was to examine (1) whether the diet of the larger captive-born mink differs from that of the smaller wild-born mink, (2) assess the regional variations between the diets of mink in mainland Denmark and on Bornholm, and (3) investigate the seasonal variation in the diet composition of mink. The stomach contents of 364 mink (243 wild-born and 114 captive-born) culled in the years 2019–2022 were analyzed. Of these, 203 mink were from mainland Denmark, and 154 were from Bornholm. No significant differences were found between the diets of captive-born mink and wild-born mink or the mink found in mainland Denmark and on the island of Bornholm. Significantly more empty stomachs were found during spring than during the summer and autumn, suggesting a bottleneck in the diet during spring.

Funder

Danish Ministry of Environment

Publisher

MDPI AG

Subject

General Veterinary,Animal Science and Zoology

Reference42 articles.

1. Long, J.L. (2003). Introduced Mammals of the World: Their History, Distribution, and Influence, CSIRO Publishing.

2. Christensen, T.K., Balsby, T.S., Mikkelsen, P., and Mellerup, K. (2022). Vildtudbyttestatistik og Vingeundersøgelsen for Jagtsæsonerne 2020/2021 og 2021/2022, Nationalt Center for Miljø og Energi (DCE).

3. Baagøe, H., and Secher Jensen, T. (2007). Dansk Pattedyratlas, Gyldendal.

4. Pagh, S., Pertoldi, C., Petersen, H.H., Jensen, T.H., Hansen, M.S., Madsen, S., Kraft, D.C.E., Iversen, N., Roslev, P., and Chriel, M. (2019). Methods for the identification of farm escapees in feral mink (Neovison vison) populations. PLoS ONE, 14.

5. Danish free-ranging mink populations consist mainly of farm animals: Evidence from microsatellite and stable isotype analyses;Pertoldi;J. Nat. Conserv.,2005

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