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8 results for “pine marten”
Post-release movement and habitat selection of translocated pine martens Martes martes
Monitoring post-release establishment and movement of animals is important in evaluating conservation translocations. We translocated 39 wild pine martens Martes martes (19 females, 20 males) from Scotland to Wales. We released them into forested areas with no conspecifics in 2015, followed by a second release in 2016, alongside the previously released animals. We used radio-tracking to describe post-release movement and habitat selection. Six martens (15%) were not re-encountered during the tracking period, of which four undertook long-distance dispersal. For the remaining individuals, we characterised two phases of movement, 'exploration' followed by 'settlement', that differed between releases. In the first release, martens remained in exploration phase for a mean of 14.5 days (SE=3.9 days) and settled at a mean distance of 8.7km (SE=1.8km) from release sites, whereas martens released in year two, alongside resident conspecifics, travelled away from release sites at a faster rate, settling sooner, at a mean of 6.6 days (SE=1.8 days), but further, at a mean distance of 14.0km (SE=1.7km) from release sites. Animals released in year one did not exhibit habitat preferences overall but within forests they favoured recently-felled areas, whereas animals released in year two showed strong selection for forested habitat but did not discriminate between forest types. The presence of conspecifics appeared influential for settlement and site fidelity of translocated martens and was associated with more rapid but more distant dispersal of the later cohort. Releases of animals in close proximity appeared to promote site fidelity and rapid establishment of ranges in the recipient environment.
Data from: Post-release movement and habitat selection of translocated pine martens Martes martes
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Translocated native pine martens Martes martes alter short-term space use by invasive non-native grey squirrels Sciurus carolinensis
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Landscape factors influencing predation on capercaillie nests by two competing mesopredators: pine marten and red fox
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Data from: The enemy of my enemy is my friend: native pine marten recovery reverses the decline of the red squirrel by suppressing grey squirrel populations
Shared enemies may instigate or modify competitive interactions between species. The dis-equilibrium caused by non-native species introductions has revealed that the outcome of such indirect interactions can often be dramatic. However, studies of enemy mediated competition mostly consider the impact of a single enemy, despite species being embedded in complex networks of interactions. Here we demonstrate that native red and invasive grey squirrels in Britain, two terrestrial species linked by resource and disease-mediated apparent competition, are also now linked by a second enemy-mediated relationship involving a shared native predator recovering from historical persecution, the European pine marten. Through combining spatial capture recapture techniques to estimate pine marten density, and squirrel site occupancy data, we find that the impact of exposure to predation is highly asymmetrical, with non-native grey squirrel occupancy strongly negatively affected by exposure to pine martens. In contrast, exposure to pine marten predation has an indirect positive effect on red squirrel populations. Pine marten predation thus reverses the well-documented outcome of resource and apparent competition between red and grey squirrels.
On following pages: 9. American Marten (Martes americana); 10. Yellow-throated Marten (Martes flavigula); 11. Stone 14. Japanese Marten (Martes melampus); 15. Fisher (Martes pennant); 16. Sable (Martes zibellina). Marten (Martes foina); 12. Nilgiri Marten (Martes gwatkinsii); 13. European Pine Marten (Martes martes); in Mustelidae
On following pages: 9. American Marten (Martes americana); 10. Yellow-throated Marten (Martes flavigula); 11. Stone 14. Japanese Marten (Martes melampus); 15. Fisher (Martes pennant); 16. Sable (Martes zibellina). Marten (Martes foina); 12. Nilgiri Marten (Martes gwatkinsii); 13. European Pine Marten (Martes martes);
Data from: The enemy of my enemy is my friend: native pine marten recovery reverses the decline of the red squirrel by suppressing grey squirrel populations
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Data from: Assessing the co-occurrence of European pine marten (Martes martes) with humans and domestic cats on a Mediterranean island
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