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Minimum size limits and the reproductive value of numerous, young, mature female fish

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dc.contributor ARC Ctr Excellence Coral Reef Studies
dc.contributor Australian Institute of Marine Science
dc.contributor Australian Inst Marine Sci
dc.contributor Coll Sci & Engn
dc.contributor James Cook Univ
dc.contributor James Cook University Williamson, David H. Harrison, Hugo B. Jones, Geoffrey P. Lavin, Charles P. 2021-04-13T22:57:21Z 2021-04-19T05:25:01Z 2021-04-13T22:57:21Z 2021-04-19T05:25:01Z 2021-03-10
dc.identifier.citation Lavin CP, Jones GP, Williamson DH, Harrison HB (2021) Minimum size limits and the reproductive value of numerous, young, mature female fish. Proceedings of the Royal Society B - Biological Sciences 288: 20202714
dc.identifier.issn 0962-8452
dc.description.abstract Fisheries management relies on various catch and effort controls to preserve spawning stock biomass and maximize sustainable yields while limiting fishery impacts on marine ecosystems. These include species-specific minimum or maximum size limits to protect either small non-reproductive subadults, a portion of reproductively mature adults, or large highly fecund individuals. Protecting size classes of mature fish is expected to yield a viable source of larvae for replenishing populations and reduce the risk of recruitment overfishing, yet size-specific recruitment contributions have rarely been assessed empirically. Here, we apply genetic parentage analysis to measure the reproductive success of a size-structured population of a commercially important species of coral grouper (Plectropomus maculatus-Serranidae) in no-take marine reserves (NTMRs) in the Great Barrier Reef Marine Park, Australia. Although the per capita reproductive success of individual fish increases rapidly with body length, the numerous young mature female fish, below the minimum size limit (MSL) (38 cm total length), were responsible for generating disproportionately large contributions (36%) towards larval replenishment of both fished and reserve reefs. Our findings indicate that MSLs are an effective harvest control measure to safeguard a portion of the spawning stock biomass for coral grouper and supplement recruitment subsidies assured from NTMRs.
dc.description.sponsorship This work was supported by an ARC Discovery Early Career Research Award to H.B.H. (DE160101141), and an ARC Discovery Grant to G.P.J. (DP190103056). Additional support was provided by the ARC Centre of Excellence for Coral Reef Studies (CE140100020).
dc.language English
dc.subject LARVAL EXPORT
dc.subject SERRANIDAE
dc.subject CORAL TROUT
dc.subject larval replenishment
dc.subject AGE STRUCTURE
dc.subject Evolutionary Biology
dc.subject numerous young mature female fish
dc.subject LARGE-SCALE
dc.subject coral reef fisheries
dc.subject Environmental Sciences & Ecology
dc.subject Life Sciences & Biomedicine - Other Topics
dc.subject coral grouper
dc.subject minimum size limits
dc.subject RESERVES
dc.subject big old fat fecund female fish
dc.subject Ecology
dc.subject Biology
dc.title Minimum size limits and the reproductive value of numerous, young, mature female fish
dc.type journal article
dc.identifier.doi 10.1098/rspb.2020.2714
dc.identifier.wos WOS:000627840400015

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