Growth estimates of young-of-the-year broadnose sevengill shark, <i>Notorynchus cepedianus</i>, a top predator with poorly calcified vertebrae

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dc.contributor.authorJavier Jaureguizar, Andres
dc.contributor.authorCortes, Federico
dc.contributor.authorMatias Braccini, J.
dc.contributor.authorWiff, Rodrigo
dc.contributor.authorMilessi, Andres C.
dc.date.accessioned2025-01-20T22:01:17Z
dc.date.available2025-01-20T22:01:17Z
dc.date.issued2022
dc.description.abstractThe broadnose sevengill shark, Notorynchus cepedianus (Peron, 1807), is a large marine top predator in temperate coastal ecosystems. Some aspects of its life history have been determined, but its growth pattern is yet to be fully understood. The authors used a multi-modelling approach and a sensitivity test to estimate growth parameters from young-of-year (YOY) length data collected off San Antonio Cape (SAC), Argentina, a critical habitat in the Southwest Atlantic Coastal Zone (SACZ). The best selected model, a sex-combined logistic growth model, estimated an asymptotic length (L-infinity) of 92.58 cm TL (95% C.I.: 86.48-105.89 cm), a growth coefficient (K) of 0.006818 days (-1) (95% C.I.: 0.004948-0.008777) and a size at birth (L-0) of 40.73 cm. The predicted annual growth (i.e., L1 - L-0) was 43.2 cm TL. Males had smaller L-0, higher K and achieved larger sizes after 1 year. The YOY in SAC attained a larger L-1 and grew faster than their Australian and South African wild counterparts. The consistent year-round presence of YOY in the SAC highlights the importance of this area as a pupping ground and potential nursery for N. cepedianus; this has direct implications for the allocation of research and management effort for the conservation of this species in the Southwest Atlantic.
dc.fuente.origenWOS
dc.identifier.doi10.1111/jfb.14976
dc.identifier.eissn1095-8649
dc.identifier.issn0022-1112
dc.identifier.urihttps://doi.org/10.1111/jfb.14976
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93806
dc.identifier.wosidWOS:000738314500001
dc.issue.numero3
dc.language.isoen
dc.pagina.final631
dc.pagina.inicio625
dc.revistaJournal of fish biology
dc.rightsacceso restringido
dc.subjectgrowth model
dc.subjectNotorynchus cepedianus
dc.subjectSan Antonio cape
dc.subjectSouthwest Atlantic
dc.subjectyoung-of-the-year
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleGrowth estimates of young-of-the-year broadnose sevengill shark, <i>Notorynchus cepedianus</i>, a top predator with poorly calcified vertebrae
dc.typeartículo
dc.volumen100
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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