Author:
Husté Aurélie,Clobert Jean,Miaud Claude
Abstract
Abstract
The isolation of animal populations due to urban activities provides a useful
framework for studying the consequences of landscape fragmentation. We
studied a population of natterjack toads (Bufo calamita) in an urban park
near Paris, France. In 2001 and 2002 we used radio-tracking to estimate the
terrestrial movements of adults around their breeding sites. Twenty-four
toads were equipped with internal transmitters in 2001 to record movements
during and after the breeding period. In 2002, 19 males were released at 300
and 380 meters from their breeding ponds. Natterjack toad movements around
and outside their breeding ponds were reduced compared to previous
observations on this species. The only exchanges that were observed occurred
between closely neighbouring breeding sites. During a translocation
experiment in 2002, 58% of the displaced males returned to their site of
capture and this happened mainly during the breeding period. The remaining
42% stayed close to the release site. There was no exchange of males between
distant breeding sites. Natterjack toad conservation needs to take into
account the high fidelity to a breeding site and the reduced breeding
dispersal and homing ability of these animals. Conservation biology in urban
landscapes constitutes a specific urban ecology with specific concepts such
as 'population area'. Information from this study can assist land managers
in establishing protected areas of high habitat quality around breeding
ponds in urban areas, and managing parks for the protection of amphibian
populations, particularly by facilitating exchanges between available
areas.
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Cited by
33 articles.
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