Analysis of Length Frequency Samples with Relative Abundance Data for the Gulf of Maine Northern Shrimp ( Pandalus borealis ) by the MULTIFAN Method

We present an extension of the MULTIFAN method for simultaneously analyzing several length frequency data sets from length frequency data collected by research trawl surveys. The assumption that the research trawl samples the animals in a regular fashion allows the proportions at age in the samples...

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Bibliographic Details
Published in:Canadian Journal of Fisheries and Aquatic Sciences
Main Authors: Fournier, David A., Sibert, John R., Terceiro, Mark
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1991
Subjects:
Aquatic Science
Ecology, Evolution, Behavior and Systematics
northern shrimp
Pandalus borealis
Online Access:http://dx.doi.org/10.1139/f91-075
http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-075
Description
Summary:We present an extension of the MULTIFAN method for simultaneously analyzing several length frequency data sets from length frequency data collected by research trawl surveys. The assumption that the research trawl samples the animals in a regular fashion allows the proportions at age in the samples to be parameterized in terms of relative year class strengths and the age-dependent selectivity of the sampling procedure. When available, relative abundance data can be incorporated into the analysis and permit the estimation of mortality. The method is applied to Gulf of Maine northern shrimp (Pandalus borealis) data. The parameter estimates obtained agree substantially with those previously obtained using a more detailed knowledge of the species' biology.

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