Reproductive biology of squaretail coralgrouper Plectropomus areolatus using age-based techniques

Rhodes, K.L., Taylor, B.M., Wichilmel, C.B., Joseph, E., Hamilton, R.J., and Almany, G.R. (2013) Reproductive biology of squaretail coralgrouper Plectropomus areolatus using age-based techniques. Journal of Fish Biology, 82 (4). pp. 1333-1350.

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Abstract

The squaretail coralgrouper Plectropomus areolatus was identified as a fast-growing, early maturing and relatively short-lived aggregation-spawning epinephelid. Examinations of sectioned otoliths found females and males first maturing at 2 and 3 years, respectively, suggesting protogynous hermaphroditism; however, no transitionals were observed in samples. Age distribution for the two sexes was similar and both were represented in the oldest age class; however, significant sex-specific differences in size-at-age were identified. Both sexes fully recruit into the fishery at age 4 years and reach 90% of asymptotic length by age 3 years. Underwater visual assessments, combined with the gonado-somatic indices, revealed a 5 month reproductive season, with interannual variability observed in the month of highest density within the spawning aggregation. Catch restrictions on adults during spawning times and at reproductive sites, combined with gear-based management and enhanced enforcement, are recommended to maintain spawning stocks. Based on the available evidence, the sexual pattern for this species is unresolved.

Item ID: 29801
Item Type: Article (Research - C1)
ISSN: 1095-8649
Keywords: Epinephelidae; growth; management; Pohnpei; Micronesia; sexual pattern
Funders: NOAA Coral Reef Conservation, U.S. Department of the Interior Office of Insular Affairs, David and Lucile Packard Foundation, U.S. Fish and Wildlife Service, Sea Grant College
Projects and Grants: NA05NMF4631049, NA04NMF4630341
Date Deposited: 14 Oct 2013 02:07
FoR Codes: 06 BIOLOGICAL SCIENCES > 0608 Zoology > 060809 Vertebrate Biology @ 60%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050209 Natural Resource Management @ 40%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8302 Fisheries - Wild Caught > 830204 Wild Caught Fin Fish (excl. Tuna) @ 100%
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