Population dynamics and conservation of the Osprey in central France.
International audience The Osprey, Pandion haliaëtus, started to breed in continental France (Loiret) in the mid 1980s. In 1999, a national recovery plan for the conservation of this species was initiated. The conservation efforts, and in particular the installations of artificial nests where natura...
Main Authors: | , |
---|---|
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | French |
Published: |
HAL CCSD
2005
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01312420 |
id |
ftccsdartic:oai:HAL:hal-01312420v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-01312420v1 2023-05-15T18:49:27+02:00 Population dynamics and conservation of the Osprey in central France. Dynamique de population et conservation du balbuzard pêcheur Pandion Haliaetus en région Centre Wahl, Rolf Barbraud, Christophe Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2005 https://hal.archives-ouvertes.fr/hal-01312420 fr fre HAL CCSD société d'études ornithologiques de France hal-01312420 https://hal.archives-ouvertes.fr/hal-01312420 ISSN: 0002-4619 Alauda https://hal.archives-ouvertes.fr/hal-01312420 Alauda, société d'études ornithologiques de France, 2005 [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2005 ftccsdartic 2021-10-24T10:26:20Z International audience The Osprey, Pandion haliaëtus, started to breed in continental France (Loiret) in the mid 1980s. In 1999, a national recovery plan for the conservation of this species was initiated. The conservation efforts, and in particular the installations of artificial nests where natural nests or trees holding nests had fallen down, favoured and sped up the colonisation of new sites by breeding pairs, and up to 18 pairs were breeding in 2003, thereby creating a small population in central France. A research program (R. Wahl) with a capture-mark-recapture design, allowed to describe the breeding phenology and to estimate key demographic parameters for this population. Since 1995, 152 fledglings were ringed as well as a few adults. In average, each breeding pair produced 2 fledglings per year, but the number of fledglings varied between sites and increased with the size of the colonies. Individuals were highly philopatric, with nearly all breeding adults coming back to breed the following year, and about 40% of the chicks fledged returning to breed in the study area. Age at first breeding was 3.2 0.4 years for females, and 4.4 1.8 years for males. Recapture probability was high and averaged 0.913. Adult survival probabilities were high and were lower for younger breeding females (0.870 0.098, IC95% : 0.551 – 0.973) than for older females and males (0.971 0.036, IC95% : 0.737 – 0.997). Survival probabilities during the first year of life was 0,512 0.156 (IC95% : 0.236 - 0.781). A matrix population model with four age classes was built to model the dynamics of this population. The population growth rate estimated with environmental stochasticity (1.245) indicated that the population should continue to increase in the near future. Although the high survival, breeding success and early age at first breeding could partly explain the increase of the population size, the rate of increase estimated by the population model remained below the observed rate of increase (1.643). The immigration of ... Article in Journal/Newspaper balbuzard pêcheur Pandion haliaetus Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology Wahl, Rolf Barbraud, Christophe Population dynamics and conservation of the Osprey in central France. |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience The Osprey, Pandion haliaëtus, started to breed in continental France (Loiret) in the mid 1980s. In 1999, a national recovery plan for the conservation of this species was initiated. The conservation efforts, and in particular the installations of artificial nests where natural nests or trees holding nests had fallen down, favoured and sped up the colonisation of new sites by breeding pairs, and up to 18 pairs were breeding in 2003, thereby creating a small population in central France. A research program (R. Wahl) with a capture-mark-recapture design, allowed to describe the breeding phenology and to estimate key demographic parameters for this population. Since 1995, 152 fledglings were ringed as well as a few adults. In average, each breeding pair produced 2 fledglings per year, but the number of fledglings varied between sites and increased with the size of the colonies. Individuals were highly philopatric, with nearly all breeding adults coming back to breed the following year, and about 40% of the chicks fledged returning to breed in the study area. Age at first breeding was 3.2 0.4 years for females, and 4.4 1.8 years for males. Recapture probability was high and averaged 0.913. Adult survival probabilities were high and were lower for younger breeding females (0.870 0.098, IC95% : 0.551 – 0.973) than for older females and males (0.971 0.036, IC95% : 0.737 – 0.997). Survival probabilities during the first year of life was 0,512 0.156 (IC95% : 0.236 - 0.781). A matrix population model with four age classes was built to model the dynamics of this population. The population growth rate estimated with environmental stochasticity (1.245) indicated that the population should continue to increase in the near future. Although the high survival, breeding success and early age at first breeding could partly explain the increase of the population size, the rate of increase estimated by the population model remained below the observed rate of increase (1.643). The immigration of ... |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Article in Journal/Newspaper |
author |
Wahl, Rolf Barbraud, Christophe |
author_facet |
Wahl, Rolf Barbraud, Christophe |
author_sort |
Wahl, Rolf |
title |
Population dynamics and conservation of the Osprey in central France. |
title_short |
Population dynamics and conservation of the Osprey in central France. |
title_full |
Population dynamics and conservation of the Osprey in central France. |
title_fullStr |
Population dynamics and conservation of the Osprey in central France. |
title_full_unstemmed |
Population dynamics and conservation of the Osprey in central France. |
title_sort |
population dynamics and conservation of the osprey in central france. |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.archives-ouvertes.fr/hal-01312420 |
genre |
balbuzard pêcheur Pandion haliaetus |
genre_facet |
balbuzard pêcheur Pandion haliaetus |
op_source |
ISSN: 0002-4619 Alauda https://hal.archives-ouvertes.fr/hal-01312420 Alauda, société d'études ornithologiques de France, 2005 |
op_relation |
hal-01312420 https://hal.archives-ouvertes.fr/hal-01312420 |
_version_ |
1766243048382005248 |