Rørbæk René Worup, Andersen Tobias Astell, Pertoldi Cino, Jørgensen Alex, Pagh Sussie
Department of Chemistry and Bioscience-Section of Biology and Environmental Science, Aalborg University, Fredrik Bajers Vej 7, 9220 Aalborg, Denmark.
Aalborg Zoo, Mølleparkvej 63, 9000 Aalborg, Denmark.
Animals (Basel). 2023 Jan 28;13(3):461. doi: 10.3390/ani13030461.
Non-native American mink () 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.
非本土美洲水貂（）是丹麦一种广泛分布的食肉动物。丹麦本土的野生种群包括从毛皮养殖场逃脱的圈养出生的水貂以及在自然环境中出生的野生水貂，而博恩霍尔姆岛的种群几乎全是野生出生的水貂。在本研究中，对丹麦本土和博恩霍尔姆岛的野生水貂的饮食进行了分析。本研究的目的是检验：（1）体型较大的圈养出生的水貂的饮食是否与体型较小的野生出生的水貂不同；（2）评估丹麦本土和博恩霍尔姆岛水貂饮食之间的区域差异；（3）调查水貂饮食组成的季节性变化。对2019年至2022年期间扑杀的364只水貂（243只野生出生和114只圈养出生）的胃内容物进行了分析。其中，203只水貂来自丹麦本土，154只来自博恩霍尔姆岛。圈养出生的水貂和野生出生的水貂之间，以及丹麦本土和博恩霍尔姆岛发现的水貂之间，在饮食上未发现显著差异。春季发现的空胃数量明显多于夏季和秋季，这表明春季饮食存在瓶颈。
