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Subject: Assessment of catch and effort data
From: Antonio Hervas <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Wed, 30 Aug 2006 13:55:18 +0200

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Hi all, 
Currently I am writing a PHD thesis about the development of stock 
assessment procedures for the scallop (pecten maximus) stock of the 
southeast coast of Ireland.  One of the chapter is about the assessment of 
catch and effort data.  Two analysis have been carried out: 1.  The 
standardisation of CPUE with the use of GLMs.  This provides annual 
abundance index, and 2. The application of the Delury depletion method. 
This was done to explore the intra-annual depletion of local populations.

Catch per unit effort data has been provided by the European communities 
logbooks.  The use of the Vessel monitoring data has been use in order to 
map the distribution of fishing effort.  CPUE from the EU logbooks was 
matched to the VMS data and then the analysis could be carried out taking 
into account the spatial distribuiton of scallop abundance and fishing 
effort.  I am writing to you all because i am looking for references on 
the assessment of catch and effort data on scallop fisheries, or others 
benthic sedentary species, in which the spatial pattern has been accounted 
Any help would be very welcome
Antonio Hervas
The Irish Sea Fisheries Board
The New Dock Road-Galway
tlf: 0035391564319 

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