Mark-recapture estimates of survival in populations of the asp viper, Vipera aspis aspis

Détails

ID Serval
serval:BIB_B364C0E24D8D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Mark-recapture estimates of survival in populations of the asp viper, Vipera aspis aspis
Périodique
Journal of Herpetology
Auteur(s)
Flatt T., Dummermuth S., Anholt B.R.
ISSN
0022-1511
Statut éditorial
Publié
Date de publication
1997
Peer-reviewed
Oui
Volume
31
Numéro
4
Pages
558-564
Langue
anglais
Résumé
We estimated the annual survivorship of two populations of the asp viper, Vipera aspis aspis, by recapturing known adult individuals in the field over six and nine years respectively. The snakes at the two study sites in the Jura mountains of northwestern Switzerland were active between mid-March and mid-October. Vipera a. aspis is easily captured by hand, has individually recognizable marks and is, therefore, well suited for long-term mark-recapture studies. The maximum likelihood estimates of annual survivorship are about 0.75 in both populations. The probability that a snake will be recaptured in any given year is about 0.4 (habitat A) and about 0.33 (habitat B). Sampling effort within a year had little effect on the probability of recapture. Our best estimate of annual survival of 0.75 for the two habitats combined compares well with other previous estimates in viperids and in V. aspis in particular. We found no detectable differences in the survival rates between sexes even when the two habitats were combined. We found weak evidence that there was a difference in the recapture probability between the sexes. The minimal adequate model for the combined data set suggested that there is a higher probability of recapturing surviving females (0.545) than males (0.331).
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Création de la notice
28/01/2013 14:55
Dernière modification de la notice
03/03/2018 20:40
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