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Growth rates of juvenile southern rock lobster (Jasus edwardsii) estimated through a diver-based tag-recapture program

Citation

Linnane, A and Hobday, D and Frusher, S and Gardner, C, Growth rates of juvenile southern rock lobster (Jasus edwardsii) estimated through a diver-based tag-recapture program, Marine and Freshwater Research, 63, (2) pp. 110-118. ISSN 1323-1650 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 CSIRO

DOI: doi:10.1071/MF11121

Abstract

Despite being one of the most economically important fisheries in south-eastern Australia, growth rates of juvenile southern rock lobster (Jasus edwardsii) have not previously been quantified in the wild. This study utilised a diver-based tag–recapture program to estimate growth rates of individuals between 40–80 mm carapace length (CL) in temperate reef sites across south-eastern Australia. Of the 7064 lobsters tagged and released, 978 (14%) were recaptured with recapture rates of 23, 5 and 7% in the States of Tasmania, South Australia and Victoria respectively. Although individual growth increments were similar between the sexes, differences in annual growth rates were evident at 50 mm CL, with males growing ~1.4 times faster than females. Increased levels of growth in males resulted from a higher moult frequency, which was found to significantly reduce in females as they reached sexual maturity at ~70–80 mm CL. No significant difference was found in growth rates of males or females between the States when all sites within each State were combined. The growth estimates from this work contribute to the understanding of juvenile lobster population dynamics and will improve current fishery models by confirming relationships between early juvenile, pre-recruit abundance and entry to the fishable biomass.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Frusher, S (Professor Stewart Frusher)
Author:Gardner, C (Professor Caleb Gardner)
ID Code:81234
Year Published:2011
Web of Science® Times Cited:4
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2012-11-27
Last Modified:2016-09-30
Downloads:0

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