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Université de Fribourg

Mark-recapture Estimates of Survival in Populations of the Asp Viper, Vipera aspis aspis

Flatt, Thomas ; Dummermuth, Stefan ; Anholt, Bradley R.

In: Journal of Herpetology, 1997, vol. 31, no. 4, p. 558-564

We estimated th eannual survivorship of two populations of the asp viper, Vipera aspis aspis, by recapturing known dult individuals in the field over six and nine years respectively. The snakes at the two study sites in th eJura mountains of northwestern Switzerland were active between mid-March and mid-October. Vispera a. aspis is easily captured by hand, has individually recognizable marks...