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dc.contributor.authorWakefield, Corey
dc.contributor.authorNewman, Stephen
dc.contributor.authorMarriott, R.
dc.contributor.authorBoddington, D.
dc.contributor.authorFairclough, D.
dc.date.accessioned2017-01-30T13:28:06Z
dc.date.available2017-01-30T13:28:06Z
dc.date.created2014-10-08T01:14:48Z
dc.date.issued2013
dc.identifier.citationWakefield, C. and Newman, S. and Marriott, R. and Boddington, D. and Fairclough, D. 2013. Contrasting life history characteristics of the eightbar grouper Hyporthodus octofasciatus (Pisces: Epinephelidae) over a large latitudinal range reveals spawning omission at higher latitudes. ICES Journal of Marine Science. 70 (3): pp. 485-497.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/31916
dc.description.abstract

Demographic data on deep-water groupers are limited despite them being highly exploited throughout the Indo-Pacific. In Western Australia, the continuous distribution of the eightbar grouper, Hyporthodus octofasciatus, spans tropical to temperate waters over 3500 km from 128S–358S. The maximum age was markedly higher in the northern tropical waters than in southern temperate waters, i.e. 47 vs 20 years. Females attained a significantly larger length-at-age in southern temperate waters. Macroscopic and microscopic, examination of gonads and annual trends in mean monthly gonadosomatic indices (GSIs) were used to determine that this monandric protogynous hermaphrodite spawns from late spring to summer (October–February) in northwestern Australia. In the temperate waters of WA, there was no evidence of reproduction and no males were observed south of 308S latitude. The lengths at which 50% of female H. octofasciatus matured and changed sex were estimated from northern tropical populations at 560 mm (6.1 years) and 1022 mm (=11 years). Although the population connectivity of H. octofasciatus is unknown, the spawning omission in temperate waters suggests recruitment from the northern tropical areas and highlights the importance of preserving spawning stocks in those northern waters.

dc.publisherOxford University Press 2009
dc.relation.urihttp://icesjms.oxfordjournals.org/content/70/3/485
dc.subjectdemography
dc.subjectprotogynous hermaphroditism
dc.subjectdeep-water
dc.subjectmaturity
dc.subjectglobal climate change
dc.subjectWestern Australia
dc.subjectage
dc.subjectreproduction
dc.subjectgrowth
dc.titleContrasting life history characteristics of the eightbar grouper Hyporthodus octofasciatus (Pisces: Epinephelidae) over a large latitudinal range reveals spawning omission at higher latitudes
dc.typeJournal Article
dcterms.source.volume70
dcterms.source.number3
dcterms.source.startPage485
dcterms.source.endPage497
dcterms.source.issn10543139
dcterms.source.titleICES Journal of Marine Science
curtin.accessStatusFulltext not available


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