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Title of Journal: Eur J Wildl Res

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Abbravation: European Journal of Wildlife Research

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Springer-Verlag

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DOI

10.1007/978-3-540-45179-2_25

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1439-0574

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Gender differences in activity patterns of America

Authors: Jana Zschille Norman Stier Mechthild Roth
Publish Date: 2009/07/24
Volume: 56, Issue: 2, Pages: 187-194
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Abstract

Circannual and circadian activity patterns of American mink Neovison vison were studied in a fishpond area in northern Germany Fourteen mink were radiotracked nine of them five males four females for at least 6 months some of them even up to 21 months Both sexes have reduced activity rates in winter months and showed a considerable increase of activity during mating season March In summer months—during the pup raising period—female activity continued to be high Male mink on the other hand were less active with the exception of August and September During this time dispersal of juveniles takes place with resident males increasingly having to defend their territories Circadian activity rhythms differed markedly between sexes All investigated females exhibited a perennial diurnal pattern Female activity during twilight and night was significantly lower than during daylight Three investigated male mink showed a typical nocturnal course throughout the year Daylight activity of these animals was very low increased during dusk and dawn activity rates and stayed at a higher level during the night Two males behaved arrhythmic they did not prefer any time of the day for activity The observed temporal strategies were discussed in context of intrasexual territoriality sexual dimorphism in body size and different environmental factorsThis research was funded by the Ministry of Agriculture and Forestry and the Hunting Association MecklenburgWestern Pomerania VI 220 c as well as by a fellowship of the Saxonian State Ministry for Science and the Fine Arts 522med We thank Dr Römisch and Prof Berger for their statistical advice as well as Julia Müller and Trevor Banham for their helpful linguistic comments on the manuscript The investigation was permitted by the State Authority for Veterinary MecklenburgWestern Pomerania file number LVL MV/TSD/7221311010/04 The experiments comply with the current laws of Germany The authors declare that they have no conflict of interest

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