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Fonctionnement démographique et sélection de l'habitat d'une population en phase d'expansion géographique : cas de la gelinotte des bois dans les alpes du sud, France
| Content Provider | Semantic Scholar |
|---|---|
| Author | Montardet, Marc |
| Copyright Year | 2005 |
| Abstract | By use of radio-tracking, we studied hazel grouse (Bonasa bonasia) in the southeastern French Alps from 1998 to 2002. The Kaplan-Meier annual survival rate of adult males (N=41) was 0.72 (95 % C. I. 0.59-0.85), and 0.60 for adult females (N =15; 95 % C. I. 0.40 0.91). For juveniles (sexes combined; N = 29) the survival over nine months (15 September-15 June) was 0.74 (95 % C. I. 0.58 0.90). The seasonal pattern of survival was different for the two sexes. Adult male survival during November_April (S = 0.76; N=38) was lower than during May-October (S = 0.95; N=41). Only three of 16 male deaths (ages combined) occurred in summer. Female survival (ages combined) during November-April (S = 0.90; N=16) was higher than during May-October (S = 0.70; N=16). Five of six females died between May and July, i.e. during egg laying, incubation or brood rearing Raptors, red foxes Vulpes vulpes or pine martens Martes martes accounted for most mortality of adults. The estimated annual survival rates were high compared to those reported for more northern populations, and the difference may be due to an extensive, dense and wellstructured habitat that reduces the ability of raptors to kill hazel grouse. The high survival rates may explain the range expansion currently occurring in the southeastern French Alps. Publication A – Survival of Hazel grouse Page : ____________________________________________________________________________________ 125 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://tel.archives-ouvertes.fr/tel-00337937/document |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
