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

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

This analysis of the variations of brown tiger prawn (Penaeus esculentus) catch in the 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 fishi...

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Veröffentlicht in:arXiv.org 2013-12
Hauptverfasser: Kienzle, Marco, Courtney, Anthony J, O'Neill, Michael F
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Sprache:eng
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Annual variations
Covariance
Fisheries
Fishing
Maximum likelihood estimates
Prawns
Quantitative Biology - Populations and Evolution
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description This analysis of the variations of brown tiger prawn (Penaeus esculentus) catch in the 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 in the dynamic of this fishery. Maximum likelihood estimates of targeted catchability (\(3.92 \pm 0.40 \ 10^{-4}\) boat-days\(^{-1}\)) were twice as large as non-targeted catchability (\(1.91 \pm 0.24 \ 10^{-4}\) boat-days\(^{-1}\)). The causes of recent decline in fishing effort in this fishery were discussed.
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subjects Annual variations
Covariance
Fisheries
Fishing
Maximum likelihood estimates
Prawns
Quantitative Biology - Populations and Evolution
title Environmental and fishing effects on the dynamic of brown tiger prawn (Penaeus esculentus) in Moreton Bay (Australia)
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