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Título

Spatio-temporal co-ocurrence of native and exotic ungulates in a Mediterranean environment

AutorSicilia, Marisa ; Miranda, María ; Cassinello, Jorge
Fecha de publicación2011
CitaciónXXXth IUGB Congress and Perdix XIII (2011)
ResumenSpatio-temporal co-occurrence of three ungulate species living in sympatry was investigated in a Mediterranean environment: one native, the Iberian red deer (Cervus elaphus hispanicus), and two exotics, the European mouflon (Ovis orientalis musimon) and the aoudad (Ammotragus lervia). The aim of the study was to infer any potential interspecific competition. All possible pairs of combinations (dyads) were considered. In order to compare the probability of species co-occurrence, multiple tests of significance for all 2 by 2 combinations were performed using a Pearson’s chi-square test. Logistic regression models were used to estimate the effects of the reproductive period, habitat, and several group attributes on co-occurrence patterns for each dyad. The probability of co-occurrence varied between dyads, and it was not always explained by random associations according to species abundance. Aoudad groups thus co-occur with mouflon groups at a higher rate than expected by random. Habitat type was the most important variable explaining co-occurrence of red deer with the other two species, mainly mouflon. This variable did not influence, however, co-occurrence of aoudad and mouflon. Among the hypotheses proposed to explain aoudad association behaviour with the other two species, competitive displacement by red deer in the past and improvements in foraging efficiency due to its association with mouflon appeared to be the most feasible explanations. As for mouflon and red deer, direct interactions might be expected at artificial food and water sources as well as resource competition under food shortage conditions in habitats preferred by both species.
DescripciónResumen del trabajo presentado al XXXth International Union of Game Biologists and Perdix XIII, celebrados en Barcelona (España) del 5 al 9 de septiembre de 2011.
URIhttp://hdl.handle.net/10261/145848
Aparece en las colecciones: (IREC) Comunicaciones congresos
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