Literaturdatenbank
Literaturdatenbank |
|
 |
|
Melero Cavero, Y. (2007). Estudio poblacional del visón americano ("mustela vison") en cataluña: ecología y control de una especie invasora. Unpublished thesis , Universitat de Barcelona, Barcelona.
Added by: Sarina Wunderlich (30 Oct 2011 14:52:39 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: MeleroCavero2007 View all bibliographic details  |
Categories: General Keywords: Geoemydidae, Habitat = habitat, invasive Arten = invasive species, Mauremys, Mauremys leprosa, Schildkröten = turtles + tortoises, Südwesteuropa = South-Western Europa, Testudinidae, Testudo, Testudo hermanni Creators: Melero Cavero Publisher: Universitat de Barcelona (Barcelona) |
Views: 4/533
Views index: 11% Popularity index: 2.75% |
| Abstract |
|
Testudinidae Testudo hermanni hermanni Mauremys leprosa Since the introduction of the American mink in Europe, this species has become in an ecological problem than implies the need of its control. There are different methods of control; however, nowadays, trapping is the most practical and feasible. The main target of this study is to provide efficient strategies for the control of the Catalonina population. Obtained results showed the capacity of the population to adapt and spread in Mediterranean environments. On the basis of these results the following conclusions were obtained: 1. The invasive American mink population studied is perfectly acclimatized and adapted to the study area. 2. Morphological differences of the studied population in comparison with other populations and the lower sexual dimorphism can be explained by an "bottleneck effect" and by the lack of trophic niche as a consequence of the acclimatization and adaptation of the population to the area of introduction where the available preys are mainly of small size. 3. The generalist and opportunist character of the species allow the individuals to prey on the available preys in the area. The high levels of American crayfish have probably contributed to the fast acclimatization and spread, by providing the energy needed for the mink's survival and reproduction. 4. The high availability of preys, allows having smaller home range and higher population densities in comparison with other population of the species. 5. The lower percentage of nocturnal activity of the individuals in the studied population is a consequence of the nocturnal activity of its preys. From a practical point of view and following the obtained results, this study advises to plan the trapping campaigns using the instructions bellow: 6. Traps should be placed in both riversides, with a maximum distance equal to the mean core area size of the individuals to maximize capturability. In areas similar to the studied area this distance is 200 m approximately. 7. Traps should be placed in spots of higher probability of selection by the individuals: helophytic vegetation and low human activity. In areas with no helophytic vegetation traps should be placed in spots that can offer a shelter to the individual. 8. Traps should be placed during the day and checked every morning since the highest activity with locomotion occurs at night, and therefore, the probability of capturability is higher at night. 9. Trapping campaigns should be done all over the population extension, although it is advised to increase the effort on the limits of the population distribution and special areas as natural parks and areas of special interest. In both cases trapping should in a range of 10.40 km from the limits of the area. 10. American mink surveys to detect its presence and distribution, can be done following the methodology used on otter surveys with 600 m transects, and 900 m in March and April.
Added by: Sarina Wunderlich |