Analysis of vessel movements and strategies using commercial catch and effort data from the New Zealand hoki fishery

Standardized catch rates from a multiplicative model of commercial catch per unit effort data have been examined to investigate vessel movements and strategies. A linear model was fitted to log-transformed commercial catch per unit effort data in the spawning hoki (Macruronus novaezelandiae) trawl f...

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Bibliographic Details
Published in:Canadian journal of fisheries and aquatic sciences 1996-09, Vol.53 (9), p.2126-2136
Main Author: Vignaux, M
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)
Fundamental and applied biological sciences. Psychology
Gadidae
Macruronus novaezelandiae
Marine
Pisces
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Summary:Standardized catch rates from a multiplicative model of commercial catch per unit effort data have been examined to investigate vessel movements and strategies. A linear model was fitted to log-transformed commercial catch per unit effort data in the spawning hoki (Macruronus novaezelandiae) trawl fishery off the west coast of the South Island of New Zealand. The residuals from this model were examined; catch rates from tows done by different vessels at different times of day are standardized and, therefore, comparable. There is evidence that vessels make decisions about where to fish based on both their own recent catch history and on observations about the location and aggregation of other vessels. There is no evidence that there is enough information transfer from vessels to make decisions on the basis of catch rates of the other vessels in the fleet.
ISSN:0706-652X
1205-7533
DOI:10.1139/f96-131