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Metapopulation distribution shapes year‐round overlap with fisheries for a circumpolar seabird

2025-04Journal article Open access
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datacite.subject.fosCiências Naturais::Ciências Biológicas
dc.contributor.authorRexer‐Huber, Kalinka
dc.contributor.author Clay, Thomas A.
dc.contributor.authorCatry, Paulo
dc.contributor.authorDebski, Igor
dc.contributor.authorParker, Graham
dc.contributor.authorRamos, Raül
dc.contributor.authorRobertson, Bruce C.
dc.contributor.authorRyan, Peter G.
dc.contributor.authorSagar, Paul M.
dc.contributor.authorStanworth, Andrew
dc.contributor.authorThompson, David R.
dc.contributor.authorTuck, Geoffrey N.
dc.contributor.authorWeimerskirch, Henri
dc.contributor.authorPhillips, Richard A.
dc.date.accessioned2025-05-12T15:18:45Z
dc.date.available2025-05-12T15:18:45Z
dc.date.issued2025-04
dc.description.abstractAlthough fisheries bycatch is the greatest threat to many migratory marine megafauna, it remains unclear how population exposure to bycatch varies across the global range of threatened species. Such assessments across multiple populations are crucial for understanding variation in impacts and for identifying the management bodies responsible for reducing bycatch. Here, we combine extensive biologging data from white‐chinned petrel (<jats:italic>Procellaria aequinoctialis</jats:italic>) populations (representing &gt;98% of their global breeding population) with pelagic and demersal longline and trawl fishing effort to map the global distribution and fisheries‐overlap hotspots for the most bycaught seabird in the Southern Hemisphere. We tracked the year‐round movements of 132 adults in 2006–2018 and examined spatial overlap among seven populations comprising three genetically distinct groupings (metapopulations). Foraging areas during the nonbreeding season were more concentrated than during breeding, with birds from all populations migrating to continental shelf or upwelling zones, but with low spatial overlap among metapopulations. Fisheries overlap differed more among than within metapopulations, underlining that these should be considered separate management units. Overlap with pelagic longline fisheries was greatest for Indian Ocean populations, and from the fleets of South Africa, Japan, Taiwan, and Spain, off southern Africa and in the High Seas. Overlap with demersal longline and trawl fisheries was greatest for Indian and Atlantic Ocean populations, within the Exclusive Economic Zones of South Africa, Namibia, and Argentina, and with the South Korean demersal longline fleet in the High Seas. The high overlap with South Korean longliners in the southwest Atlantic Ocean is of particular concern as demersal fishing in this region is not covered by any Regional Fisheries Management Organization (RFMO). We also identified fisheries‐overlap hotspots within RFMOs where there are no seabird‐bycatch mitigation requirements (1.5%–53.1% of total overlap within the area of competence of each RFMO), or where current mitigation regulations need to be strengthened. Our recommendations are that management bodies target the high‐priority fisheries we have identified for improved bycatch monitoring, mandatory best‐practice bycatch mitigation, and close monitoring of compliance, given the conservation concerns for white‐chinned petrels and other threatened seabirds. Biologging, Bycatch mitigatio, Geolocator, Longline fisheries, Migratory connectivity, Regional Fisheries Management Organization, Trawl fisheries, White-chinned petreleng
dc.description.sponsorshipMinistry of Primary Industries
dc.identifier.citationRexer-Huber, K., Parker, G., Robertson, B. C., Clay, T. A., Catry, P., Debski, I., Ramos, R., Ryan, P. G., Sagar, P. M., Thompson, D. R., Stanworth, A., Tuck, G. N., Weimerskirch, H., & Phillips, R. A. (2025). Metapopulation distribution shapes year-round overlap with fisheries for a circumpolar seabird. Ecological Applications : A Publication of the Ecological Society of America, 35(3), e70019. https://doi.org/10.1002/eap.70019
dc.identifier.doi10.1002/eap.70019
dc.identifier.issn1051-0761
dc.identifier.issn1939-5582
dc.identifier.urihttp://hdl.handle.net/10400.12/13520
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.relationPRO2006-01
dc.relation.hasversionhttps://esajournals.onlinelibrary.wiley.com/doi/epdf/10.1002/eap.70019?getft_integrator=scopus&src=getftr&utm_source=scopus
dc.relation.ispartofEcological Applications
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBiologging
dc.subjectBycatch mitigatio
dc.subjectGeolocator
dc.subjectLongline fisheries
dc.subjectMigratory connectivity
dc.subjectRegional Fisheries Management Organization
dc.subjectTrawl fisheries
dc.subjectWhite-chinned petrel
dc.titleMetapopulation distribution shapes year‐round overlap with fisheries for a circumpolar seabirdeng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage19
oaire.citation.issue3
oaire.citation.startPage1
oaire.citation.titleEcological applications : A publication of the Ecological Society of America
oaire.citation.volume35
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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