Space use of a non-native species,the European hare (<Emphasis Type="Italic">Lepus europaeus</Emphasis>), in habitats of the southern vizcacha (<Emphasis Type="Italic">Lagidium viscacia</Emphasis>) in Northwestern Patagonia,Argentina |
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Authors: | G I Galende E Raffaele |
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Institution: | (1) Bariloche Regional University Center, National University of Comahue, Comahue, Argentina;(2) Laboratory Ecotono, Bariloche Regional University Center, National University of Comahue, Quintral 1250, 8400 Bariloche, Argentina;(3) Department of Zoology Bariloche Regional University Center, National University of Comahue, Quintral 1250, 8400 Bariloche, Argentina |
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Abstract: | Two medium-sized herbivores with high trophic overlap coexist on rocky outcrops in the Patagonian landscape: the southern
vizcacha (Lagidium viscacia), which is a native rock specialist, and the European hare (Lepus europaeus), which is a non-native species. We determined the patterns of space use related to distance from outcrops and analyzed spatial
overlap between the two species. There were significant differences between the two species in the use of space adjacent to
outcrops. The southern vizcacha mainly uses short and medium distances from the outcrop (up to 40 m), whereas the hare’s greatest
activity was recorded at distances greater than 50 m. However, there is a partial overlap at medium distances (30–40 m) among
both herbivores. Although, in general terms, there is no significant spatial overlap between hares and southern vizcachas,
their biological characteristics and the high dietary overlap between the species allow us to predict that, if resources become
scarce, the hare could extend its area of activity, as what happens elsewhere, and exploit food resources near outcrops, increasing
the vulnerability of vizcacha colonies. |
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Keywords: | Spatial use Rocky shelters Predation risk Introduced species |
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