Literaturdatenbank
Literaturdatenbank |
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Hidalgo-Vila, J., Portheault, A., Ruiz, X., Conejo, A., & Diaz-Paniagua, C. , Optimizing detection, catchability and removal of exotic turtles from a natural environment. Paper presented at XIII Congreso Espanol.
Added by: Admin (14 Aug 2008 20:32:48 UTC) |
| Resource type: Proceedings Article BibTeX citation key: PerezSantigosa2006 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, Trachemys, Trachemys scripta Creators: , Conejo, Diaz-Paniagua, Hidalgo-Vila, Portheault, Ruiz Publisher: Sociedad de Ciencias Aranzadi Zientzi Elkartea Collection: XIII Congreso Espanol |
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| Abstract |
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A program of detection and removal of exotic turtles was performed in a lake in Huelva, where a naturalized population of Trachemys scripta elegans coexisted with the autochthonous turtles Mauremys leprosa and Emys orbicularis. Detection of exotic turtles was very effective when cork platforms for basking were located in isolated areas of open water. This technique was also useful for monitoring and counting individuals. Submerged baited traps which are effective for catching authoctonous turtles, were rarely effective for exotic turtles, as only small or intermediate individuals were captured mainly in summer. Basking traps, a transformation of the basking cork platform with a net which is raised to trap the animals, were very effective for exotic turtles, trapping a similar number of males and females, which were individuals with a wide range of body size and ages. Basking turtles on the cork platforms could also be efficiently eliminated by shooting, although this requires an expert marksman, using 243 calibre bullets. Because females were easily detected when they migrated to land for nesting (from April to June, mainly during the mornings), frequent walks around the shores of the ponds are an effective method for removing females and even their eggs.
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