Association between Outlying Values in Body Condition Indices in Small Mammals and Their Habitats

Linas Balčiauskas and Laima Balčiauskienė ()
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Linas Balčiauskas: Nature Research Centre, Akademijos 2, 08412 Vilnius, Lithuania
Laima Balčiauskienė: Nature Research Centre, Akademijos 2, 08412 Vilnius, Lithuania

Land, 2024, vol. 13, issue 8, 1-14

Abstract: Habitat type and habitat change are very important factors in the body condition of small mammals that inhabit them. The response can be positive, increasing, or the opposite, decreasing body condition. We analyzed outliers of the body condition indices (BCIs) of 12 species trapped in nine different habitats during 1980–2023 in Lithuania, a mid-latitude country. Mixed and fragmented habitats, as well as commensal habitats, could be considered the least suitable for small mammals, based on the highest proportions of underfit and low proportions of best-fit individuals. On the contrary, meadows and disturbed habitats (landfills and cormorant colonies) had the highest proportions of best-fit individuals, while the proportion of under-fit individuals was much lower than expected. We found outliers in the BCI in all species, except for the under-fit harvest mice ( Micromys minutus ), and in all habitats, though not numerous. The presence of the highest BCI in yellow-necked mice ( Apodemus flavicollis ) and bank voles ( Clethrionomys glareolus ) in the disturbed habitats studied and in house mice ( Mus musculus ) in commensal habitats may be related to the resources provided by these habitats. Our results demonstrate the feasibility of using retrospective small mammal morphometric data to analyze their relationship with habitat.

Keywords: body condition extremes; mice; voles; shrews; habitats; adaptation (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
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