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Ageing of juvenile coral grouper (Plectropomus maculatus) reveals year-round spawning and recruitment: implications for seasonal closures.
Harrison, H B; Drane, L; Berumen, M L; Cresswell, B J; Evans, R D; Galbraith, G F; Srinivasan, M; Taylor, B M; Williamson, D H; Jones, G P.
Afiliação
  • Harrison HB; School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK.
  • Drane L; Marine Biology and Aquaculture, College of Science & Engineering, James Cook University, Townsville 4811, Queensland, Australia.
  • Berumen ML; Marine Biology and Aquaculture, College of Science & Engineering, James Cook University, Townsville 4811, Queensland, Australia.
  • Cresswell BJ; Red Sea Research Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.
  • Evans RD; Marine Biology and Aquaculture, College of Science & Engineering, James Cook University, Townsville 4811, Queensland, Australia.
  • Galbraith GF; Commonwealth Scientific and Industrial Research Organisation, Townsville 4811, Queensland, Australia.
  • Srinivasan M; Department of Biodiversity Conservation and Attractions, 17 Dick Perry Ave, Kensington 6151, Australia.
  • Taylor BM; Oceans Institute, The University of Western Australia, Crawley, Western Australia 6009, Australia.
  • Williamson DH; Marine Biology and Aquaculture, College of Science & Engineering, James Cook University, Townsville 4811, Queensland, Australia.
  • Jones GP; Centre for Tropical Water and Aquatic Ecosystem Research (TropWATER), James Cook University, Townsville 4811, Queensland, Australia.
Proc Biol Sci ; 290(2001): 20230584, 2023 06 28.
Article em En | MEDLINE | ID: mdl-37339745
Temporal patterns in spawning and juvenile recruitment can have major effects on population size and the demographic structure of coral reef fishes. For harvested species, these patterns are crucial in determining stock size and optimizing management strategies such as seasonal closures. For the commercially important coral grouper (Plectropomus spp.) on the Great Barrier Reef, histological studies indicate peak spawning around the summer new moons. Here we examine the timing of spawning activity for P. maculatus in the southern Great Barrier Reef by deriving age in days for 761 juvenile fish collected between 2007 and 2022, and back-calculating settlement and spawning dates. Age-length relationships were used to estimate spawning and settlement times for a further 1002 juveniles collected over this period. Unexpectedly, our findings indicate year-round spawning activity generates distinct recruitment cohorts that span several weeks to months. Peak spawning varied between years with no clear association with environmental cues, and little to no alignment with existing seasonal fisheries closures around the new moon. Given the variability and uncertainty in peak spawning times, this fishery may benefit from additional and longer seasonal closures, or alternative fisheries management strategies, to maximize the recruitment contribution from periods of greatest reproductive success.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bass / Antozoários Limite: Animals Idioma: En Revista: Proc Biol Sci Assunto da revista: BIOLOGIA Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bass / Antozoários Limite: Animals Idioma: En Revista: Proc Biol Sci Assunto da revista: BIOLOGIA Ano de publicação: 2023 Tipo de documento: Article