Literaturdatenbank
Literaturdatenbank |
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Florencio, M., Diaz-Paniagua, C., & Hidalgo-Vila, J. , Diet composition of the exotic turtle trachemys scripta elegans from naturalized populations in southern spain. Paper presented at XIII Congreso Espanol.
Added by: Admin (14 Aug 2008 20:32:48 UTC) |
| Resource type: Proceedings Article BibTeX citation key: PerezSantigosa2006a View all bibliographic details  |
Categories: General Keywords: Emydidae, Emys, Emys orbicularis, Geoemydidae, Habitat = habitat, invasive Arten = invasive species, Mauremys, Mauremys leprosa, Schildkröten = turtles + tortoises, Südwesteuropa = South-Western Europe Creators: , Diaz-Paniagua, Florencio, Hidalgo-Vila Publisher: Sociedad de Ciencias Aranzadi Zientzi Elkartea Collection: XIII Congreso Espanol |
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| Abstract |
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We analysed the faeces and digestive tracts of 30 individuals from two ponds in Huelva. The diet was composed of vegetal and animal food, and their proportions varied among localities. Turtles from one study site contained 24% plant food and 76% animal food by volume. In the other study site, the turtle diet contained 56% plant and 44% animal food. We observed ontogenic changes in the diet of the turtles from one of the two study sites. A seasonal variation in diet was observed, turtles consuming lower proportion of plant food during summer. Animal material in the diet mainly included crustaceans, gastropods and insects (Odonata, Coleoptera and Heteroptera), as well as remains of dead vertebrates (fishes). The introduced American crayfish was the most commonly consumed prey in one of the two study sites, while in the other site turtles mainly fed on gastropods of the genus Physa. Because of its wider variation, the diet of T. s. elegans was similar to Mauremys leprosa’s in particular situations and to Emys orbicularis in other conditions, as it competed for feeding resources with both autochthonous species of turtles.
Added by: Admin |