Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil
The red flounder Paralichthys orbignyanus is a large pleuronectiform fish endemic in coastal waters, coastal lagoons and estuaries in the southwestern Atlantic. Although less abundant than other Paralichthys spp, its high price makes it a valuable resource for small-scale fishers that have been int...
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| Format: | Article |
| Language: | English |
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Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
2022-10-01
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| Series: | Marine and Fishery Sciences |
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| Online Access: | https://ojs.inidep.edu.ar/index.php/mafis/article/view/248 |
| _version_ | 1828139995207041024 |
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| author | Manuel Haimovici Eidi Kikuchi Carolina Gonçalves Oliveira |
| author_facet | Manuel Haimovici Eidi Kikuchi Carolina Gonçalves Oliveira |
| author_sort | Manuel Haimovici |
| collection | DOAJ |
| description |
The red flounder Paralichthys orbignyanus is a large pleuronectiform fish endemic in coastal waters, coastal lagoons and estuaries in the southwestern Atlantic. Although less abundant than other Paralichthys spp, its high price makes it a valuable resource for small-scale fishers that have been intensely fished in the last decades. To study its growth and lifespan in southern Brazil, we examined thin otolith sections collected for age determinations of both young-of-the-year (YOY) and older fishes. Opaque bands form mainly in spring and summer, coincident with the reproductive season. Larger and older males reached 601 mm and eight years, while females reached 985 mm and 11 years. The assumed daily microincrements counts ranged from 127 to 196 for YOY of 135 to 184 mm TL. The common weight-length equation for grouped sexes was TW♀♂=0.000015TL2.93 (mm, g). The von Bertalanffy growth equations were: TL♀=1076(1–e–0.15 (t+0.78)); TL♂=652(1–e–0.28 (t+0.48)); and TL♀♂=839(1–e–0.20 (t+0.67)). Therefore, P. orbignyanus is a fast-growing and relatively short-living species for which females attain larger length and older ages than males, characteristics that have to be taken into account for its stock assessment and management.
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| first_indexed | 2024-04-11T19:00:54Z |
| format | Article |
| id | doaj.art-92ef556abd894249ade01e12fe50e1b1 |
| institution | Directory Open Access Journal |
| issn | 2683-7951 |
| language | English |
| last_indexed | 2024-04-11T19:00:54Z |
| publishDate | 2022-10-01 |
| publisher | Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) |
| record_format | Article |
| series | Marine and Fishery Sciences |
| spelling | doaj.art-92ef556abd894249ade01e12fe50e1b12022-12-22T04:08:01ZengInstituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)Marine and Fishery Sciences2683-79512022-10-0136110.47193/mafis.3612023010103Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern BrazilManuel HaimoviciEidi Kikuchi0Carolina Gonçalves Oliveira1Laboratório de Recursos Pesqueiros Demersais, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália km 8, 96203-000 Rio Grande, RS, Brazil. - Programa de Pós-graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, km 8, 96203-000 Rio Grande, RS, Brazil.Laboratório de Recursos Pesqueiros Demersais, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália km 8, 96203-000 Rio Grande, RS, Brazil The red flounder Paralichthys orbignyanus is a large pleuronectiform fish endemic in coastal waters, coastal lagoons and estuaries in the southwestern Atlantic. Although less abundant than other Paralichthys spp, its high price makes it a valuable resource for small-scale fishers that have been intensely fished in the last decades. To study its growth and lifespan in southern Brazil, we examined thin otolith sections collected for age determinations of both young-of-the-year (YOY) and older fishes. Opaque bands form mainly in spring and summer, coincident with the reproductive season. Larger and older males reached 601 mm and eight years, while females reached 985 mm and 11 years. The assumed daily microincrements counts ranged from 127 to 196 for YOY of 135 to 184 mm TL. The common weight-length equation for grouped sexes was TW♀♂=0.000015TL2.93 (mm, g). The von Bertalanffy growth equations were: TL♀=1076(1–e–0.15 (t+0.78)); TL♂=652(1–e–0.28 (t+0.48)); and TL♀♂=839(1–e–0.20 (t+0.67)). Therefore, P. orbignyanus is a fast-growing and relatively short-living species for which females attain larger length and older ages than males, characteristics that have to be taken into account for its stock assessment and management. https://ojs.inidep.edu.ar/index.php/mafis/article/view/248Fisheriesfloundermanagementsmicroincrementspopulation dynamicssouthwestern Atlantic |
| spellingShingle | Manuel Haimovici Eidi Kikuchi Carolina Gonçalves Oliveira Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil Marine and Fishery Sciences Fisheries flounder managements microincrements population dynamics southwestern Atlantic |
| title | Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil |
| title_full | Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil |
| title_fullStr | Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil |
| title_full_unstemmed | Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil |
| title_short | Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil |
| title_sort | age and growth of the red flounder paralichthys orbignyanus teleostei pleuronectiformes in southern brazil |
| topic | Fisheries flounder managements microincrements population dynamics southwestern Atlantic |
| url | https://ojs.inidep.edu.ar/index.php/mafis/article/view/248 |
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