Changes in tropical fish assemblages associated with small-scale fisheries: a case study in the Pacific off central Mexico

Changes in tropical fish assemblages associated with small-scale fisheries: a case study in the... Information from artisanal marine fisheries inColima, Mexico is analyzed to find evidence ofchange in the composition of fish assemblagesresulting from fishing pressure. Catchcomposition from up to 20 boats per day, during2 to 6 days a month, were recorded from 1983 to1998. Stability of the species composition wasanalyzed using rank correlation methods, andmeasures of diversity (specific richness,Shannon-Wiener index, evenness) were estimatedfrom data. The resulting time-series wereanalyzed to detect trends. No significantdifferences were found in the number of speciescaught by month nor were significant trends indiversity detected. The composition of the fishassemblages is dynamic. The presence ofpersistent and resilient species that definedthe values obtained of diversity and evennesswas detected, but did not determine thestructure of the community, which is apparentlydefined by other factors. The changes incomposition of the catch probably are aconsequence of environmental fluctuations andrandom events, and not a direct consequence offishing pressures on the fish community. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Reviews in Fish Biology and Fisheries Springer Journals

Changes in tropical fish assemblages associated with small-scale fisheries: a case study in the Pacific off central Mexico

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Publisher
Springer Journals
Copyright
Copyright © 2002 by Kluwer Academic Publishers
Subject
Life Sciences; Freshwater & Marine Ecology; Zoology
ISSN
0960-3166
eISSN
1573-5184
D.O.I.
10.1023/A:1025355102004
Publisher site
See Article on Publisher Site

Abstract

Information from artisanal marine fisheries inColima, Mexico is analyzed to find evidence ofchange in the composition of fish assemblagesresulting from fishing pressure. Catchcomposition from up to 20 boats per day, during2 to 6 days a month, were recorded from 1983 to1998. Stability of the species composition wasanalyzed using rank correlation methods, andmeasures of diversity (specific richness,Shannon-Wiener index, evenness) were estimatedfrom data. The resulting time-series wereanalyzed to detect trends. No significantdifferences were found in the number of speciescaught by month nor were significant trends indiversity detected. The composition of the fishassemblages is dynamic. The presence ofpersistent and resilient species that definedthe values obtained of diversity and evennesswas detected, but did not determine thestructure of the community, which is apparentlydefined by other factors. The changes incomposition of the catch probably are aconsequence of environmental fluctuations andrandom events, and not a direct consequence offishing pressures on the fish community.

Journal

Reviews in Fish Biology and FisheriesSpringer Journals

Published: Oct 13, 2004

References

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