eCite Digital Repository

Demography of a large exploited grouper, Plectropomus laevis: Implications for fisheries management


Heupel, MR and Williams, AJ and Welch, DJ and Davies, CR and Adams, S and Carlos, G and Mapstone, BD, Demography of a large exploited grouper, Plectropomus laevis: Implications for fisheries management, Marine and Freshwater Research, 61, (2) pp. 184-195. ISSN 1323-1650 (2010) [Refereed Article]

DOI: doi:10.1071/MF09056


Species in the coral trout complex Plectropomus spp. are some of the most desired and exploited in the Indo-Pacific, although data are limited for most species. Demographic parameters of blue-spot coral trout, Plectropomus laevis, were estimated on the basis of specimens collected from five regions of the Great Barrier Reef and Torres Strait, Australia, between 1995 and 2005 to define demography and population status over a broad range. In total, 1249 individuals were collected to estimate growth, mortality and reproductive parameters. Growth parameters based on the von Bertalanffy model were K = 0.096 year1, L = 1159 mm fork length (FL) and the best-fit model suggested non-asymptotic growth over the size and age ranges represented in the sample. Maximum age was 16 years, total mortality was estimated at 0.39 (0.031), and estimated size and age at first maturity were 299 mm FL (range: 299872) and at 1 year (range: 16.5), respectively, with the size range over which sex change occurred at 460872 mm FL. Population parameters and available relative abundance estimates indicated that long-term sustainable harvest rates of P. laevis will be lower than those for P. leopardus and species-specific size-based management measures are necessary to ensure the species is not overfished.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Wild caught fin fish (excl. tuna)
UTAS Author:Carlos, G (Mr Gary Carlos)
ID Code:70464
Year Published:2010
Web of Science® Times Cited:12
Deposited By:Research Division
Deposited On:2011-06-22
Last Modified:2011-06-22

Repository Staff Only: item control page