Low levels of sibship encourage use of larvae in western Atlantic bluefin tuna abundance estimation by close-kin mark-recapture.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
03 11 2022
03 11 2022
Historique:
received:
20
12
2021
accepted:
20
09
2022
entrez:
4
11
2022
pubmed:
5
11
2022
medline:
8
11
2022
Statut:
epublish
Résumé
Globally, tunas are among the most valuable fish stocks, but are also inherently difficult to monitor and assess. Samples of larvae of Western Atlantic bluefin tuna Thunnus thynnus (Linnaeus, 1758) from standardized annual surveys in the northern Gulf of Mexico provide a potential source of "offspring" for close-kin mark-recapture (CKMR) estimates of abundance. However, the spatial patchiness and highly skewed numbers of larvae per tow suggest sampled larvae may come from a small number of parents, compromising the precision of CKMR. We used high throughput genomic profiling to study sibship within and among larval tows from the 2016 standardized Gulf-wide survey compared to targeted sampling carried out in 2017. Full- and half-siblings were found within both years, with 12% of 156 samples in 2016 and 56% of 317 samples in 2017 having at least one sibling. There were also two pairs of cross cohort half-siblings. Targeted sampling increased the number of larvae collected per sampling event but resulted in a higher proportion of siblings. The combined effective sample size across both years was about 75% of the nominal size, indicating that Gulf of Mexico larval collections could be a suitable source of juveniles for CKMR in Western Atlantic bluefin tuna.
Identifiants
pubmed: 36329078
doi: 10.1038/s41598-022-20862-9
pii: 10.1038/s41598-022-20862-9
pmc: PMC9633702
doi:
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
18606Subventions
Organisme : NOAA RESTORE Science Program
ID : NOAA-NOS-NCCOS-2017-2004875
Organisme : Cooperative Institute for Marine and Atmospheric Studies
ID : NA20OAR4320472
Informations de copyright
© 2022. The Author(s).
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