DOI: 10.1111/gcb.13997
Scopus记录号: 2-s2.0-85040033588
论文题名: Differential adult survival at close seabird colonies: The importance of spatial foraging segregation and bycatch risk during the breeding season
作者: Genovart M. ; Bécares J. ; Igual J.-M. ; Martínez-Abraín A. ; Escandell R. ; Sánchez A. ; Rodríguez B. ; Arcos J. ; Oro D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 3 起始页码: 1279
结束页码: 1290
语种: 英语
英文关键词: adult survival
; Calonectris diomedea
; capture–recapture
; climatic index
; demography
; fisheries bycatch
; Mediterranean
; remote tracking
; risk map
Scopus关键词: adult
; breeding season
; bycatch
; climate effect
; colony
; demography
; foraging behavior
; seabird
; survival
; Aves
; Calonectris diomedea
英文摘要: Marine megafauna, including seabirds, are critically affected by fisheries bycatch. However, bycatch risk may differ on temporal and spatial scales due to the uneven distribution and effort of fleets operating different fishing gear, and to focal species distribution and foraging behavior. Scopoli's shearwater Calonectris diomedea is a long-lived seabird that experiences high bycatch rates in longline fisheries and strong population-level impacts due to this type of anthropogenic mortality. Analyzing a long-term dataset on individual monitoring, we compared adult survival (by means of multi-event capture–recapture models) among three close predator-free Mediterranean colonies of the species. Unexpectedly for a long-lived organism, adult survival varied among colonies. We explored potential causes of this differential survival by (1) measuring egg volume as a proxy of food availability and parental condition; (2) building a specific longline bycatch risk map for the species; and (3) assessing the distribution patterns of breeding birds from the three study colonies via GPS tracking. Egg volume was very similar between colonies over time, suggesting that environmental variability related to habitat foraging suitability was not the main cause of differential survival. On the other hand, differences in foraging movements among individuals from the three colonies expose them to differential mortality risk, which likely influenced the observed differences in adult survival. The overlap of information obtained by the generation of specific bycatch risk maps, the quantification of population demographic parameters, and the foraging spatial analysis should inform managers about differential sensitivity to the anthropogenic impact at mesoscale level and guide decisions depending on the spatial configuration of local populations. The approach would apply and should be considered in any species where foraging distribution is colony-specific and mortality risk varies spatially. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110484
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: IMEDEA (CSIC-UIB), Esporles, Mallorca, Spain; CEAB (CSIC), Accés Cala Sant Francesc, Blanes,Girona, Catalonia, Spain; SEO/BirdLife – Marine Programme, Delegació de Catalunya, Barcelona, Spain; Grupo de Investigación en Biología Evolutiva, Departamento de Bioloxía, Universidade da Coruña, A Coruña, Spain; SOM (Societat Ornitològica de Menorca), Es Castell, Menorca, Spain; Oficina Técnica Devesa-Albufera (Ayuntamiento de Valencia), Valencia, Spain; Canary Islands' Ornithology and Natural History Group (GOHNIC), Tenerife, Canary Islands, Spain
Recommended Citation:
Genovart M.,Bécares J.,Igual J.-M.,et al. Differential adult survival at close seabird colonies: The importance of spatial foraging segregation and bycatch risk during the breeding season[J]. Global Change Biology,2018-01-01,24(3)