Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, Venezuela
Acoupa weakfish, Cynoscion acoupa, in Lake Maracaibo is subject to intense commercial fishing by an artisanal fleet, and a recent decrease in fish size observed from landings is of concern. This fishery has not yet been modeled, and its assessment and the establishment of management practices to ove...
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| Format: | Article |
| Language: | English |
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Vicerractoría Investigación
2013-03-01
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| Series: | Revista de Biología Tropical |
| Subjects: | |
| Online Access: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442013000100013&lng=en&tlng=en |
| _version_ | 1797761461616902144 |
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| author | Orlando José Ferrer Montaño Isabel Cristina Morales |
| author_facet | Orlando José Ferrer Montaño Isabel Cristina Morales |
| author_sort | Orlando José Ferrer Montaño |
| collection | DOAJ |
| description | Acoupa weakfish, Cynoscion acoupa, in Lake Maracaibo is subject to intense commercial fishing by an artisanal fleet, and a recent decrease in fish size observed from landings is of concern. This fishery has not yet been modeled, and its assessment and the establishment of management practices to overcome the current overfished condition are urgently needed. To address this, we used recent and past empirical growth estimates to model relative yield-per-recruit under different lengths at first capture. Our results from relative yield-perrecruit analysis showed evidence that growth and recruitment overfishing occur under current fishing practices in Lake Maracaibo. Particular attention was given to fishing practices in El Tablazo Bay where young, small fish predominate in the commercial catches (mean total length=33.7cm), well below the length at first sexual maturity (~40cm TL) for both sexes. As management strategies, we propose to set a mesh size limit at or above 8.89cm (3.5in), which will reduce fishing mortality of immature fish, increase yield-per-recruit, and will result in an increase of Acoupa weakfish recruitment for the long term in Lake Maracaibo. |
| first_indexed | 2024-03-12T19:13:22Z |
| format | Article |
| id | doaj.art-adcd2e0a09754cd48893c3fbb7ae7d48 |
| institution | Directory Open Access Journal |
| issn | 0034-7744 |
| language | English |
| last_indexed | 2024-03-12T19:13:22Z |
| publishDate | 2013-03-01 |
| publisher | Vicerractoría Investigación |
| record_format | Article |
| series | Revista de Biología Tropical |
| spelling | doaj.art-adcd2e0a09754cd48893c3fbb7ae7d482023-08-02T05:39:37ZengVicerractoría InvestigaciónRevista de Biología Tropical0034-77442013-03-01611173180S0034-77442013000100013Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, VenezuelaOrlando José Ferrer Montaño0Isabel Cristina Morales1Universidad del ZuliaUniversidad del ZuliaAcoupa weakfish, Cynoscion acoupa, in Lake Maracaibo is subject to intense commercial fishing by an artisanal fleet, and a recent decrease in fish size observed from landings is of concern. This fishery has not yet been modeled, and its assessment and the establishment of management practices to overcome the current overfished condition are urgently needed. To address this, we used recent and past empirical growth estimates to model relative yield-per-recruit under different lengths at first capture. Our results from relative yield-perrecruit analysis showed evidence that growth and recruitment overfishing occur under current fishing practices in Lake Maracaibo. Particular attention was given to fishing practices in El Tablazo Bay where young, small fish predominate in the commercial catches (mean total length=33.7cm), well below the length at first sexual maturity (~40cm TL) for both sexes. As management strategies, we propose to set a mesh size limit at or above 8.89cm (3.5in), which will reduce fishing mortality of immature fish, increase yield-per-recruit, and will result in an increase of Acoupa weakfish recruitment for the long term in Lake Maracaibo.http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442013000100013&lng=en&tlng=enCynoscion acouparendimiento-por-recluta relativolongitud de primera madurezLago de MaracaiboVenezuela |
| spellingShingle | Orlando José Ferrer Montaño Isabel Cristina Morales Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, Venezuela Revista de Biología Tropical Cynoscion acoupa rendimiento-por-recluta relativo longitud de primera madurez Lago de Maracaibo Venezuela |
| title | Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, Venezuela |
| title_full | Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, Venezuela |
| title_fullStr | Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, Venezuela |
| title_full_unstemmed | Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, Venezuela |
| title_short | Relative yield-per-recruit and management strategies for Cynoscion acoupa (Perciformes: Sciaenidae) in Lake Maracaibo, Venezuela |
| title_sort | relative yield per recruit and management strategies for cynoscion acoupa perciformes sciaenidae in lake maracaibo venezuela |
| topic | Cynoscion acoupa rendimiento-por-recluta relativo longitud de primera madurez Lago de Maracaibo Venezuela |
| url | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442013000100013&lng=en&tlng=en |
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