Documenting Loss of Large Trophy Fish from the Florida Keys with Historical PhotographsDocumentación de la Pérdida de Peces de Trofeo en los Cayos de Florida con Fotografías Históricas
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Abstract
Abstract: A loss of large vertebrates has occurred in aquatic and terrestrial ecosystems, but data to measure long‐term population changes are sparse. Historical photographs provide visual and quantitative evidence of changes in mean individual size and species composition for groups of marine fish that have been targeted by sport fishing. I measured such trends for 13 groups of recreationally caught “trophy” reef fish with photographs taken in Key West, Florida, from 1956 to 2007. The mean fish size declined from an estimated 19.9 kg (SE 1.5) to 2.3 kg (SE 0.3), and there was a major shift in species composition. Landings from 1956 to 1960 were dominated by large groupers (Epinephelus spp.), and other large predatory fish were commonly caught, including sharks with an average length of just <2 m. In contrast, landings in 2007 were composed of small snappers (Lutjanus spp. and Ocyurus chrysurus) with an average length of 34.4 cm (SE 0.62), and the average length of sharks declined by more than 50% over 50 years. Major declines in the size of fish caught were not reflected in the price of fishing trips, so customers paid the same amount for a less‐valuable product. Historical photographs provide a window into a more pristine coral reef ecosystem that existed a half a century ago and lend support to current observations that unfished reef communities are able to support large numbers of large‐bodied fish.
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DOI: 10.1111/j.1523-1739.2008.01152.x
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="spa">Documenting Loss of Large Trophy Fish from the Florida Keys with Historical PhotographsDocumentación de la Pérdida de Peces de Trofeo en los Cayos de Florida con Fotografías Históricas</title><author><name sortKey="Mcclenachan, Loren" uniqKey="Mcclenachan L">LOREN McCLENACHAN</name><affiliation wicri:level="1"><mods:affiliation>Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093‐0208, U.S.A., email lmcclenachan@ucsd.edu</mods:affiliation><country wicri:rule="url">États-Unis</country><wicri:regionArea>Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093‐0208, U.S.A.</wicri:regionArea><wicri:noRegion>U.S.A.</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="RBID">ISTEX:5D4EE2A8DB41C98000DCC22EFDC1E7C997D341A3</idno><date when="2009">2009</date><idno type="doi">10.1111/j.1523-1739.2008.01152.x</idno><idno type="url">https://api.istex.fr/document/5D4EE2A8DB41C98000DCC22EFDC1E7C997D341A3/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002528</idno><idno type="wicri:Area/Istex/Curation">002528</idno><idno type="wicri:Area/Istex/Checkpoint">001092</idno><idno type="MainMerge">001092</idno><idno type="wicri:Area/Main/Merge">001260</idno></publicationStmt><seriesStmt><idno type="ISSN">0888-8892</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arrecifes de coral</term><term>Coral reefs</term><term>Directrices cambiantes</term><term>Ecología histórica</term><term>Historical ecology</term><term>Overfishing</term><term>Peces de arrecife</term><term>Reef fish</term><term>Shifting baselines</term><term>Sobrepesca</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="eng">Abstract: A loss of large vertebrates has occurred in aquatic and terrestrial ecosystems, but data to measure long‐term population changes are sparse. Historical photographs provide visual and quantitative evidence of changes in mean individual size and species composition for groups of marine fish that have been targeted by sport fishing. I measured such trends for 13 groups of recreationally caught “trophy” reef fish with photographs taken in Key West, Florida, from 1956 to 2007. The mean fish size declined from an estimated 19.9 kg (SE 1.5) to 2.3 kg (SE 0.3), and there was a major shift in species composition. Landings from 1956 to 1960 were dominated by large groupers (Epinephelus spp.), and other large predatory fish were commonly caught, including sharks with an average length of just <2 m. In contrast, landings in 2007 were composed of small snappers (Lutjanus spp. and Ocyurus chrysurus) with an average length of 34.4 cm (SE 0.62), and the average length of sharks declined by more than 50% over 50 years. Major declines in the size of fish caught were not reflected in the price of fishing trips, so customers paid the same amount for a less‐valuable product. Historical photographs provide a window into a more pristine coral reef ecosystem that existed a half a century ago and lend support to current observations that unfished reef communities are able to support large numbers of large‐bodied fish.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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