Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands
International audience The eVects of temporal, spatial, environmental and operational eVects on seabird incidental mortality in the legal Patagonian toothWsh longline Wshery operating, between 2003 and 2006, in French exclusive economic zones of Crozet and Kerguelen Islands were analysed. During the...
Published in: | Polar Biology |
---|---|
Main Authors: | , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2010
|
Subjects: | |
Online Access: | https://hal.science/hal-00527426 https://doi.org/10.1007/s00300-009-0713-3 |
id |
ftunivnantes:oai:HAL:hal-00527426v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:hal-00527426v1 2023-05-15T17:02:03+02:00 Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands Delord, Karine Gasco, Nicolas Barbraud, Christophe Weimerskirch, Henri Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2010-10-19 https://hal.science/hal-00527426 https://doi.org/10.1007/s00300-009-0713-3 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-009-0713-3 hal-00527426 https://hal.science/hal-00527426 doi:10.1007/s00300-009-0713-3 ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-00527426 Polar Biology, 2010, 33, pp.367-378. ⟨10.1007/s00300-009-0713-3⟩ Bycatch · Longline · Crozet · Kerguelen · Petrels · Procellaria aequinoctialis · Procellaria cinerea · Factors analysis · CCAMLR [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2010 ftunivnantes https://doi.org/10.1007/s00300-009-0713-3 2023-02-08T00:52:59Z International audience The eVects of temporal, spatial, environmental and operational eVects on seabird incidental mortality in the legal Patagonian toothWsh longline Wshery operating, between 2003 and 2006, in French exclusive economic zones of Crozet and Kerguelen Islands were analysed. During the study period, the mean bycatch rate varied from 0.05 to 0.12 birds per 1,000 hooks. Two species were concerned by incidental mortality: white-chinned petrels (88%) and grey petrels (11.5%). Males of white-chinned petrel seemed more at a risk than females. Logbooks data tended to underreport mortality when compared with dedicated Wshery observers. The results indicate that temporal (season or phenology) and spatial (area) factors reXecting mortality risk for seabirds played the most signiWcant role in the incidental mortality of the two species. Operational (integrated weight mainline, number of scaring lines and number of hooks hauled) and environmental factors (wind/vessel angle, moon brightness) were also inXuential, although less signiWcantly, in increasing this mortality risk. Our two steps analyses by separately modelling the probability of presence and the abundance given presence suggest that the decrease in seabird bycatch over the period was mainly due to an important decrease in probability (occurrence) of mortality. Article in Journal/Newspaper Kerguelen Islands Polar Biology Université de Nantes: HAL-UNIV-NANTES Kerguelen Kerguelen Islands Polar Biology 33 3 367 378 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Bycatch · Longline · Crozet · Kerguelen · Petrels · Procellaria aequinoctialis · Procellaria cinerea · Factors analysis · CCAMLR [SDE]Environmental Sciences |
spellingShingle |
Bycatch · Longline · Crozet · Kerguelen · Petrels · Procellaria aequinoctialis · Procellaria cinerea · Factors analysis · CCAMLR [SDE]Environmental Sciences Delord, Karine Gasco, Nicolas Barbraud, Christophe Weimerskirch, Henri Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands |
topic_facet |
Bycatch · Longline · Crozet · Kerguelen · Petrels · Procellaria aequinoctialis · Procellaria cinerea · Factors analysis · CCAMLR [SDE]Environmental Sciences |
description |
International audience The eVects of temporal, spatial, environmental and operational eVects on seabird incidental mortality in the legal Patagonian toothWsh longline Wshery operating, between 2003 and 2006, in French exclusive economic zones of Crozet and Kerguelen Islands were analysed. During the study period, the mean bycatch rate varied from 0.05 to 0.12 birds per 1,000 hooks. Two species were concerned by incidental mortality: white-chinned petrels (88%) and grey petrels (11.5%). Males of white-chinned petrel seemed more at a risk than females. Logbooks data tended to underreport mortality when compared with dedicated Wshery observers. The results indicate that temporal (season or phenology) and spatial (area) factors reXecting mortality risk for seabirds played the most signiWcant role in the incidental mortality of the two species. Operational (integrated weight mainline, number of scaring lines and number of hooks hauled) and environmental factors (wind/vessel angle, moon brightness) were also inXuential, although less signiWcantly, in increasing this mortality risk. Our two steps analyses by separately modelling the probability of presence and the abundance given presence suggest that the decrease in seabird bycatch over the period was mainly due to an important decrease in probability (occurrence) of mortality. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Delord, Karine Gasco, Nicolas Barbraud, Christophe Weimerskirch, Henri |
author_facet |
Delord, Karine Gasco, Nicolas Barbraud, Christophe Weimerskirch, Henri |
author_sort |
Delord, Karine |
title |
Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands |
title_short |
Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands |
title_full |
Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands |
title_fullStr |
Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands |
title_full_unstemmed |
Multivariate eVects on seabird bycatch in the legal Patagonian toothWsh longline Wshery around Crozet and Kerguelen Islands |
title_sort |
multivariate evects on seabird bycatch in the legal patagonian toothwsh longline wshery around crozet and kerguelen islands |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00527426 https://doi.org/10.1007/s00300-009-0713-3 |
geographic |
Kerguelen Kerguelen Islands |
geographic_facet |
Kerguelen Kerguelen Islands |
genre |
Kerguelen Islands Polar Biology |
genre_facet |
Kerguelen Islands Polar Biology |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-00527426 Polar Biology, 2010, 33, pp.367-378. ⟨10.1007/s00300-009-0713-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-009-0713-3 hal-00527426 https://hal.science/hal-00527426 doi:10.1007/s00300-009-0713-3 |
op_doi |
https://doi.org/10.1007/s00300-009-0713-3 |
container_title |
Polar Biology |
container_volume |
33 |
container_issue |
3 |
container_start_page |
367 |
op_container_end_page |
378 |
_version_ |
1766055274199646208 |