Literaturdatenbank
Literaturdatenbank |
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Bertolero, A. , Results of reintroduction of the mediterranean pond turtle mauremys leprosa in the ebro delta. Paper presented at XIII Congreso Espanol.
Added by: Admin (14 Aug 2008 20:32:44 UTC) |
| Resource type: Proceedings Article BibTeX citation key: Bertolero2006a View all bibliographic details  |
Categories: General Keywords: Geoemydidae, Habitat = habitat, Mauremys, Mauremys leprosa, Schildkröten = turtles + tortoises, Südwesteuropa = South-Western Europe Creators: Bertolero Publisher: Sociedad de Ciencias Aranzadi Zientzi Elkartea Collection: XIII Congreso Espanol |
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| Abstract |
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The presence of the Mediterranean pond turtle Mauremys leprosa at the Ebro delta is well documented in the diverse catalogues and distribution atlases published since 1977. At this site the species has been considered to be scarce since the end of the 1980’s, whereas its previous situation is unknown. For this reason, in 1987 the Ebro Delta Natural Park launched a conservation program based on the release of individuals. The release sites were chosen based on previous knowledge of the presence of the species, and/or the habitat suitability. Between 1987 and 2001, 552 turtles were released, mainly at two sites (303 in l’Arispe wells, and 233 in l’Encanyissada lagoon). To determine the result of these reintroductions, monitoring has been carried out from 2001 to 2006, defining some assessment criteria. In spite of the large number of Mediterranean pond turtles released at these two sites in the Ebro Delta, no viable population was obtained. Various long-term assessment criteria indicate: 1) the growth and good condition of the individuals released (the only positive result); 2) the absence of reproduction; 3) the apparently reduced survival level; and 4) the negative growth rate of the population. The habitat of the Ebro Delta marshes may not be favourable to this species, and the scarce data on its presence may correspond to individuals dispersing from the river. As a result, we consider that the data regarding presence are not always good indicators of residual populations.
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