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Environmental and fishing effects on the dynamics of brown tiger prawn (Penaeus esculentus) in Moreton Bay (Australia)

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Kienzle, M., Courtney, A. J. and O’Neill, M. F. (2014) Environmental and fishing effects on the dynamics of brown tiger prawn (Penaeus esculentus) in Moreton Bay (Australia). Fisheries Research, 155 . pp. 138-148. ISSN 0165-7836

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Article Link: http://dx.doi.org/10.1016/j.fishres.2014.02.030

Publisher URL: http://www.sciencedirect.com/science/article/pii/S0165783614000769

Abstract

This analysis of the variations of brown tiger prawn (Penaeus esculentus) catch in Moreton Bay multispecies trawl fishery estimated catchability using a delay difference model. It integrated several factors responsible for variations in catchability: targeting of fishing effort, increasing fishing power and changing availability. An analysis of covariance was used to define fishing events targeted at brown tiger prawns. A general linear model estimated inter-annual variations of fishing power. Temperature-induced changes in prawn behaviour played an important role on the dynamics of this fishery. Maximum likelihood estimates of targeted catchability (4.09 ± 0.42 × 10−4 boat-day−1) were twice as large as non-targeted catchability (1.86 ± 0.25 × 10−4 boat-day−1). The causes of recent declines in fishing effort in this fishery were discussed.

Item Type:Article
Business groups:Animal Science
Keywords:Tiger prawns Stock assessment Delay-difference model Stock-recruitment Catchability
Subjects:Aquaculture and Fisheries > Fisheries > Fishery research
Aquaculture and Fisheries > Fisheries > Shellfish fisheries
Aquaculture and Fisheries > Fisheries > Fishery conservation
Live Archive:13 May 2014 05:26
Last Modified:03 Sep 2021 16:44

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