Monitoring and distribution of the lynx Lynx lynx in the Swiss Jura Mountains
Capt, S. 2007: Monitoring and distribution of the lynx Lynx lynx in the Swiss Jura Mountains. - Wildl. Biol. 13: 356-364.
Lynx were reintroduced to the Jura Mountains in the mid-1970s. A first retrospective update of the situation in France and Switzerland was undertaken 10 years later. Since then, real-time collection of occasional observations has been going on in both countries. The monitoring methods have been standardised since the beginning of the 1990s using, among other methods, a network of observers. During 1972-2001, 862 observations were collected in Switzerland and in this paper, these are used to describe the colonisation of the Swiss Jura Mountains and the present distribution of lynx. A comparison with the results of French researchers shows that during the first years of recolonisation, most of the observations were collected in the Swiss part of the Jura Mountains. Today, the French territory has become the core area of the population and includes about O of the population. The population has recovered after a period of reduced presence at the beginning of the 1990s. The range occupied permanently by lynx in the Swiss Jura Mountains is estimated to be 2,100 km2, representing a potential population of 17-23 resident individuals. The range occupied permanently by lynx in the Jura Mountains on both sides of the border is estimated to be 7,100 km2. Depending on the degree of saturation in the population, this represents a potential population of 56-78 resident individuals. Compared to existing habitat suitability models, most of the suitable habitat has already been occupied. In the future more importance will be given to the exchange of information across the international border and the participation of local people in the survey. I recommend that active monitoring using camera-traps be carried out periodically as a supplement to the ongoing passive surveillance system.
Key words: distribution, Jura Mountains, Lynx lynx, monitoring, population size
Simon Capt*, KORA, Thunstrasse 31, Muri b. Bern, Switzerland - e-mail: email@example.com
*Present address: Centre Suisse de Cartographie de la Faune, Terreaux 14, CH-2000 Neuchâtel, Switzerland
Received 12 August 2004, accepted 28 June 2006
Associate Editor: John D.C. Linnell