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Changes in red fox habitat preference and rest site fidelity following a disease-induced population decline

100%

Newman T. J., Baker P. J., Simcock E., Saunders G., White P. C. L., Harris S.

Acta Theriologica

2003

tom 48

nr 1

The habitat preferences of red foxesVulpes vulpes (Linnaeus, 1758) in Bristol, UK, were compared during periods of high and low population density following an outbreak of sarcoptic mange (Sarcoptes scabiei). These periods are termed ‘pre-epizootic’ and ‘post-epizootic’, respectively. Habitat preferences were compared between periods during nocturnal activity and diurnal inactivity using compositional analysis. Back gardens were the most preferred habitat for pre-epizootic foxes during periods of activity; back gardens and allotment/woodland habitats were equally preferred by post-epizootic foxes, with a trend for allotment/woodland to be the most favoured. During periods of inactivity, pre-epizootic foxes selected back gardens for diurnal rest sites, compared with allotments/woodland in the post-epizootic period. Post-epizootic foxes also showed a significant decrease in rest sitefidelity, such that they were very unlikely to re-use a rest site more than once. In comparison, pre-epizootic foxes were often very faithful to one or a small number of sites. Such changes in habitat preference and rest site fidelity could have been facilitated by: (1) changes in food availability, (2) a decrease in intra-specific competition, (3) the requirements of defending larger territories post-epizootic, or (4) an avoidance of habitats that might increase the likelihood of mange transmission. The management implications of these results are discussed.

Habitat utilization by sympatric European mink Mustela lutreola and polecats Mustela putorius in South-Western France

84%

Fournier P., Maizeret C., Jimenez D., Chusseau J.-P., Aulagnier S., Spitz F.

Acta Theriologica

2007

tom 52

nr 1

The European minkMustela lutreola Linnaeus, 1761 and the European polecatMustela putorius Linnaeus, 1758 are related species sympatric in southwestern France. The European mink is rapidly disappearing whereas the polecat maintains good populations. Seasonal habitat use of both species was compared in the Landes de Gascogne region to identify if some vulnerability factors of the European mink were associated with habitats occupied by this mustelid. Potential habitats were mapped using a satellite picture and 12 main types of habitats were defined. Animal locations were recorded by radiotracking 9 European mink and 14 polecats from March 1996 to August 1999. Resting animals were located by triangulation, and, when possible, resting places were described. Animals in activity were tracked by continuous monitoring. Data collected revealed a strong preference of European mink for flooded habitats, particularly open marshes, flooded woodlands and moorlands. They seldom left the corridor of the riparian forest and their resting places were mainly in flooded environments, above ground (under herbs or bushes) or in cavities between tree roots. European polecats were less tightly linked to wetlands. Most of their locations were in the pine forests outside the valleys and their resting places were mainly in burrows. The strong specialisation of European mink in aquatic habitats is probably one of the main reasons for its decline because wetlands suffer drastic damages throughout all of its range. Maintaining adequate water levels is crucial for satisfying habitat requirements of mink.

Ograniczanie wyników

2 Acta Theriologica

1 Aulagnier S.

1 Baker P. J.

1 Chusseau J.-P.

1 Fournier P.

1 Harris S.

1 Jimenez D.

1 Maizeret C.

1 Newman T. J.

1 Saunders G.

1 Simcock E.

1 Spitz F.

1 White P. C. L.

1 2007

1 2003

Wyniki wyszukiwania

Changes in red fox habitat preference and rest site fidelity following a disease-induced population decline

Habitat utilization by sympatric European mink Mustela lutreola and polecats Mustela putorius in South-Western France