Sensitivity of the stock assessment for the Antarctic krill fishery to time-varying natural and fishing mortality

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dc.contributor.authorJohannessen, Elling Deehr
dc.contributor.authorKrafft, Bjorn A.
dc.contributor.authorDonovan, Carl R.
dc.contributor.authorWiff, Rodrigo
dc.contributor.authorCaneco, Bruno
dc.contributor.authorLowther, Andrew
dc.date.accessioned2025-01-20T16:14:28Z
dc.date.available2025-01-20T16:14:28Z
dc.date.issued2024
dc.description.abstractThe stock assessment model for the Antarctic krill fishery is a population model operating on daily timesteps, which permits modeling within-year patterns of some population dynamics. We explored the effects of including within-year patterns in natural and fishing mortality on catch limits of krill, by incorporating temporal presence of key predator species and contemporary temporal trends of the fishing fleet. We found that inclusion of within-year variation in natural and fishing mortalities increased catch limits. Fishing mortality had a greater effect than natural mortality despite differences in top-down predation on krill, and potentially increased catch limits by 24% compared to the baseline model. Additionally, the stock assessment model allowed a higher catch limit when fishing was during peak summer months than autumn. Number of days with active fishing was negatively related to precautionary catch limits. Future stock assessments should incorporate contemporary spatiotemporal fishing trends and consider implementing additional ecosystem components into the model.
dc.fuente.origenWOS
dc.identifier.doi10.1111/fme.12721
dc.identifier.eissn1365-2400
dc.identifier.issn0969-997X
dc.identifier.urihttps://doi.org/10.1111/fme.12721
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90442
dc.identifier.wosidWOS:001257204500001
dc.issue.numero6
dc.language.isoen
dc.revistaFisheries management and ecology
dc.rightsacceso restringido
dc.subjectCCAMLR
dc.subjectecosystem-based management
dc.subjectkey species
dc.subjectpredator interactions
dc.subjectSouthern Ocean
dc.subjecttemporal dynamics
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.titleSensitivity of the stock assessment for the Antarctic krill fishery to time-varying natural and fishing mortality
dc.typeartículo
dc.volumen31
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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