Literaturdatenbank
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Abad, V., Larrosa, M., Pardo, B., Ballestar, R., Anadón, J. D., & Giménez Casalduero, A. , Predation by mammalian carnivorous fauna in three populations with varied abundance of spur-thighed tortoise (testudo graeca graeca) in south-eastern spain. Paper presented at XIII Congreso Espanol.
Added by: Admin (14 Aug 2008 20:32:44 UTC) Last edited by: Beate Pfau (16 Apr 2011 12:29:41 UTC) |
| Resource type: Proceedings Article BibTeX citation key: Abad2006a View all bibliographic details  |
Categories: General Keywords: Fressfeinde = predators, Habitat = habitat, Schildkröten = turtles + tortoises, Südwesteuropa = South-Western Europe, Testudinidae, Testudo, Testudo graeca Creators: Abad, Anadón, Ballestar, Giménez Casalduero, Larrosa, Pardo Publisher: Sociedad de Ciencias Aranzadi Zientzi Elkartea Collection: XIII Congreso Espanol |
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| Abstract |
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Testudinidae Predation by mammalian carnivorous fauna is an important cause of mortality in Testudo graeca in their first few years of life (Rodríguez et al. 2002). During Spring in 2005 we made different census itineraries for this endangered species, consisting of linear transects in some populations throughout its distribution area in the provinces of Almeria and Murcia in south-eastern Spain. This information was used to estimate its local abundance by using the Distance program (Laake et al. 1993). In these populations we also performed linear transects in which all carnivorous excrement found was collected. We examined the excrement from three populations with a varied abundance of tortoises (high, medium and low abundance). Each piece of excrement was assigned to a predator and its contents were analyzed. We found evidence of predation caused by two mammalian species: stone marten (Martes foina) and red fox (Vulpes vulpes); the latter to a greater extent. The rate of predation observed varied according to the abundance of tortoises among the studied population (12% in the population with high abundance, 2% in the population with medium abundance and 0% in the population with low abundance). We found a proportional relationship between the local abundance of spur-thighed tortoise and its predation rate.
Added by: Admin Last edited by: Beate Pfau |