Population genomics informs the management of harvested snappers across north-western Australia.

Autor: Payet SD; Western Australian Fisheries and Marine Research Laboratories, Department of Primary Industries and Regional Development, Government of Western Australia, 39 Northside Drive, Hillarys, Western Australia, 6025, Australia. samuel.payet@dpird.wa.gov.au., Underwood J; Australian Institute of Marine Science, Indian Ocean Marine Research Centre, Level 3, The University of Western Australia, Fairway, Crawley, WA, 6009, Australia., Berry O; CSIRO Environomics Future Science Platform, The University of Western Australia, Crawley, WA, 6009, Australia., Saunders T; Department of Primary Industry and Resources, Northern Territory Government, 33 Vaughan St, Berrimah, NT, 0828, Australia., Travers MJ; Western Australian Fisheries and Marine Research Laboratories, Department of Primary Industries and Regional Development, Government of Western Australia, 39 Northside Drive, Hillarys, Western Australia, 6025, Australia., Wakefield CB; Western Australian Fisheries and Marine Research Laboratories, Department of Primary Industries and Regional Development, Government of Western Australia, 39 Northside Drive, Hillarys, Western Australia, 6025, Australia., Miller K; Australian Institute of Marine Science, Indian Ocean Marine Research Centre, Level 3, The University of Western Australia, Fairway, Crawley, WA, 6009, Australia., Newman SJ; Western Australian Fisheries and Marine Research Laboratories, Department of Primary Industries and Regional Development, Government of Western Australia, 39 Northside Drive, Hillarys, Western Australia, 6025, Australia.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Nov 04; Vol. 14 (1), pp. 26598. Date of Electronic Publication: 2024 Nov 04.
DOI: 10.1038/s41598-024-77424-4
Abstrakt: Failure to consider population structure when managing harvested fishes increases the risk of stock depletion, yet empirical estimates of population structure are often lacking for important fishery species. In this study, we characterise genetic variation in single nucleotide polymorphisms (SNPs) to assess population structure for three harvested species of tropical snappers across the broad (up to 300 km wide) and extensive (~ 4000 km) continental shelf of north-western Australia. Comparisons across ~ 300 individuals per species, showed remarkably similar patterns of genetic structure among Lutjanus sebae (red emperor), L. malabaricus (saddletail snapper) and Pristipomoides multidens (goldband snapper) despite subtle differences in biological and ecological traits. Low levels of genetic subdivision were reflected in an isolation by distance relationship where genetic connectivity increased with geographic proximity. This indicates extensive but not unlimited dispersal across the north-western Australian shelf. Our findings provide evidence of connectivity between current management areas, violating the assumption of multiple independent stocks. Spatial stock assessment models may be more suitable for the management of these species however demographic connectivity rates cannot be accurately estimated from the conventional population genetic approaches applied in this study. We recommend that managers aim to maintain adequate spawning biomass across current management areas, and assess stocks at finer scales, where practical.
(© 2024. Crown.)
Databáze: MEDLINE
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