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Regional patterns in puerulus catches from eastern and western Tasmania

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Cohen, PJ and Gardner, C (2007) Regional patterns in puerulus catches from eastern and western Tasmania. Journal of Crustacean Biology, 27 (4). pp. 592-596. ISSN 0278-0372

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Abstract

Approximately 65% of Tasmania’s southern rock lobster Jasus edwardsii catch is taken from the west coast. Fishers from the west coast
have reported that many inshore sites that were productive 10 or 15 years ago are no longer productive so that they now receive reduced
effort, with effort displaced into other regions. The failure of stocks to recover in these sites despite widespread increase in biomass in the
Tasmanian fishery overall suggests that recruitment to the inshore west may be low. This was investigated from puerulus catch monitoring,
which has been conducted using crevice collectors at 28 sites around the Tasmanian coast at various periods. Catches at the 8 sites off the
west coast (0.24 6 0.06 mean pueruli per collector per month) have been consistently lower than those from the 18 sites off eastern
Tasmania (1.68 6 0.12 mean pueruli per collector per month). This spatial pattern supports the hypothesis that low recruitment to inshore
west coast areas results in a population that is not robust to fishing pressure. Regional differences in recruitment point to the need to
incorporate spatial components into management of rock lobsters.

Item Type: Article
Journal or Publication Title: Journal of Crustacean Biology
Publisher: Allen Press
Page Range: pp. 592-596
ISSN: 0278-0372
Date Deposited: 07 Apr 2008 14:40
Last Modified: 18 Nov 2014 03:35
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