Reproduction success in European badgers, red foxes and raccoon dogs in relation to sett cohabitation.

Krzysztof Nowakowski,Grzegorz Gabryś,Jan Cichocki,Agnieszka Ważna,Przemysław Kurek,Tapio Mappes

doi:10.1371/journal.pone.0237642

Krzysztof Nowakowski, Grzegorz Gabryś + Show 4 more

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https://doi.org/10.1371/journal.pone.0237642

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Abstract

The setts of the European badger Meles meles can be cohabited during reproductive season by the red fox Vulpes vulpes and raccoon dog Nyctereutes procyonoides. There is no information on the possible impact of both species on the size of badgers’ litter. The aim of the study was to show the influence of cohabitation of the same setts by badger, raccoon dog and fox on the litter size. The research was conducted in 2012–2014 and 2018 in the lowland forests of western Poland. We conducted the survey of setts by direct observations and analysis of photographic material from trap cameras during mid-April–July each year. We recorded 85 badger litters, 18 fox litters, and 15 raccoon dog litters. Average litter size was 1.71 (±0.90), 2.44 (±1.34) and 4.93 (±2.76) litter mates in badgers, foxes and raccoon dogs, respectively for all observed pairs. Badger litter size did not differ between setts used only by badgers including pairs with no cubs (1.66 ± 0.98) and cohabited with foxes (1.90 ± 0.32) or raccoon dogs (1.88 ± 0.81). However, foxes reared even more cubs in setts cohabited with badgers than when badger was absent (2.90 ± 1.37 vs. 1.88 ± 1.13 respectively). In the case of raccoon dogs, there were no differences in the mean number of their cubs in setts with badgers (5.25 ± 2.92) and without badgers (4.57 ± 2.76). The results indicate that the cohabitation of setts by badgers, foxes and raccoon dogs does not affect litter size negatively.

Highlights

Physical engineered structures such as dug burrows can provide shelter for other terrestrial vertebrates and positively affect their breeding success [1]
In 33 badger setts broods of foxes and raccoon dogs have been recorded. 56% of foxes (N = 18) and 53% of raccoon dogs (N = 15) breeding pairs reared their cubs when badgers with their cubs were present in the same sett
In the case of raccoon dogs there were no differences (F1, 12 = 0.170, P = 0.687, Fig 2) in the mean number of cubs in setts with (5.25 ± 2.92) and without badgers (4.57 ± 2.76). This is the first study that describes that cohabitation of burrows by multiple native and alien mesocarnivores does not affect litter size

Summary

Introduction

Physical engineered structures such as dug burrows can provide shelter for other terrestrial vertebrates and positively affect their breeding success [1]. Burrows provide microhabitats that increase species richness and abundance [2, 3]. Many burrowing mammals are considered to be crucial in ecosystem functioning [4]. The knowledge about the interspecific interactions between mesocarnivores cohabiting the same burrows is accumulating, the data is scarce and further investigations are needed [e.g. 5–9]. There is an increasing evidence of mammals cohabitation of burrows. The effects of cohabitation on the breeding are unknown. We assess cohabitation of three mesocarnivores and the effects of cohabitation on the litter size

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