Variations in growth, longevity and natural mortality for the protogynous hermaphroditic eightbar grouper Hyporthodus octofasciatus between the Indian and Pacific Oceans

C.B. Wakefield; A.J. Williams; S.J. Newman; M. Bunel; D.K. Boddington; E. Vourey; D.V. Fairclough

doi:10.1016/j.fishres.2015.06.021

Back

Variations in growth, longevity and natural mortality for the protogynous hermaphroditic eightbar grouper Hyporthodus octofasciatus between the Indian and Pacific Oceans

Journal article

Peer reviewed

Variations in growth, longevity and natural mortality for the protogynous hermaphroditic eightbar grouper Hyporthodus octofasciatus between the Indian and Pacific Oceans

C.B. Wakefield, A.J. Williams, S.J. Newman, M. Bunel, D.K. Boddington, E. Vourey and D.V. Fairclough

Fisheries Research, Vol.172, pp.26-33

2015

DOI: https://doi.org/10.1016/j.fishres.2015.06.021

Files and links (1)

url

Link to Published Version *Subscription may be requiredView

Abstract

Increased fishing pressure on deep-water demersal fishes in relatively recent times highlights the need for a better understanding of their biology, demography and relative abundance. The eightbar grouper Hyporthodus octofasciatus is one of the largest species of Epinephelidae and is highly valued in relatively deep-water fisheries throughout the Indo-West Pacific region. Currently, information on the life history of H. octofasciatus is limited to the south-eastern Indian Ocean. We compared estimated life history parameters for H. octofasciatus from this region with the western central Pacific Ocean. Histological examination of gonads of H. octofasciatus from a wide length and age range (295–1740 mm TL and 6–65 years) suggested that this species is a protogynous hermaphrodite in the Pacific Ocean, which is consistent with data for this species in the south-eastern Indian Ocean and its congeners. However, the maximum length (1740 mm TL), asymptotic length (L∞, 1912 mm TL) and longevity (65 years) were much greater in the Pacific compared to the Indian Ocean (1509 mm TL, 1166 mm TL and 47–56 years), resulting in substantially different growth trajectories and a lower instantaneous rate of natural mortality in the Pacific Ocean (i.e., 0.06 vs 0.09 year−1). Such regional variations in life history traits across the Indo-Pacific need to be considered in assessments and management of H. octofasciatus stocks within and across jurisdictions.

Details

Title: Variations in growth, longevity and natural mortality for the protogynous hermaphroditic eightbar grouper Hyporthodus octofasciatus between the Indian and Pacific Oceans
Authors/Creators: C.B. Wakefield (Author/Creator) - Curtin University
A.J. Williams (Author/Creator) - Pacific Community
S.J. Newman (Author/Creator) - Curtin University
M. Bunel (Author/Creator) - Pacific Community
D.K. Boddington (Author/Creator) - Curtin University
E. Vourey (Author/Creator) - Pacific Community
D.V. Fairclough (Author/Creator) - Government of Western Australia
Publication Details: Fisheries Research, Vol.172, pp.26-33
Publisher: Elsevier BV
Identifiers: 991005543986607891
Copyright: © 2015 Elsevier B.V.
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites

Metrics

46 Record Views

17 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.92 Fisheries Ecology
Web Of Science research areas: Fisheries
ESI research areas: Plant & Animal Science