| Titre : | Estimating survival probabilities from ringing data. (2010) |
| Auteurs : | Jochen Bellebaum, Auteur ; Ulrich Koeppen, Auteur ; Bodo Grajetzky, Auteur |
| Type de document : | Article |
| Dans : | Vogelwarte (48(1) FEB 2010) |
| Article en page(s) : | 21-32 |
| Langues: | Allemand |
| Résumé : | Estimates of survival probabilities and reproduction in bird populations are of increasing importance for population modelling We used the free software MARK with data from the Hiddensee ringing scheme and a local colour ringing study on 110 Robins Erithacus rubecula to estimate survival probabilities for four common passerine birds Depending on the type of data available, we used Cormack-Jolly-Seber models for live recaptures or resightings and models after Burnham (1993) for a combination of recaptures and recoveries Three species gave plausible survival estimates which varied in precision according to species and data For live recaptures or resightings, emigration affected the results for at least one age-class, i. e one parameter could not be estimated reliably. Cormack-Jolly-Seber models also required sufficiently high probabilities for recaptures or resightings which were achieved by selecting data from study areas with intensive multi-year ringing and reporting of own recaptures Combined models after Burnham could estimate survival for all age-classes from the entire data for a species without previous selection Survival is readily estimable in species which are hunted on migration as long as recoveries are reported Data from ringing of migrating birds at stopover sites may lack sufficient numbers of recaptures or recoveries even if large numbers were ringed each year |



