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

Kienzle, Marco and Courtney, Anthony J. and O’Neill, Michael 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(s): 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
Deposited On:13 May 2014 05:26
Last Modified:13 May 2014 05:26

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