Age, growth, and ontogenetic variation in the sagitta otolith of Opsanus beta (Goode & Bean, 1880), a non-native species in a wetland of international importance
Invasive species are among the most important problems for biodiversity conservation worldwide, particularly in megadiverse countries such as Brazil. However, there is no biological information to develop policies for managing invasive species populations in many cases. The life history parameters a...
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Veröffentlicht in: | Latin american journal of aquatic research 2022-03, Vol.50 (1), p.124-134 |
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description | Invasive species are among the most important problems for biodiversity conservation worldwide, particularly in megadiverse countries such as Brazil. However, there is no biological information to develop policies for managing invasive species populations in many cases. The life history parameters and otolith variations are essential to understanding the adaptations of the species introduced in marine environments. This study aimed to identify the age structure and ontogenetic variation in the sagitta otolith of Opsanus beta. Fish samples were obtained monthly in the Paranaguá Estuarine Complex (PEC), south of Brazil. The shape indices verified ontogenetic variations in the otoliths (PERMANOVA; F = 110; P < 0.0001), but no sexual variations were observed in the shape of the otoliths (PERMANOVA; F = 3.65; P > 0.05). Specimen aged between 1 to 9 years were observed in the PEC, with the highest occurrence of individuals between 3 and 6 years (78%). No sexual differences were observed between the ages by the Kimura test. Our results confirm that the O. beta population is well established with age groups similar to that observed in the region where the species is native. |
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However, there is no biological information to develop policies for managing invasive species populations in many cases. The life history parameters and otolith variations are essential to understanding the adaptations of the species introduced in marine environments. This study aimed to identify the age structure and ontogenetic variation in the sagitta otolith of Opsanus beta. Fish samples were obtained monthly in the Paranaguá Estuarine Complex (PEC), south of Brazil. The shape indices verified ontogenetic variations in the otoliths (PERMANOVA; F = 110; P < 0.0001), but no sexual variations were observed in the shape of the otoliths (PERMANOVA; F = 3.65; P > 0.05). Specimen aged between 1 to 9 years were observed in the PEC, with the highest occurrence of individuals between 3 and 6 years (78%). No sexual differences were observed between the ages by the Kimura test. Our results confirm that the O. beta population is well established with age groups similar to that observed in the region where the species is native.</description><identifier>ISSN: 0718-560X</identifier><identifier>EISSN: 0718-560X</identifier><identifier>DOI: 10.3856/vol50-issue1-fulltext-2743</identifier><language>eng</language><publisher>Valparaiso: Pontificia Universidad Catolica de Valparaiso, Escuela de Ciencias del Mar</publisher><subject>Adaptation ; Age ; Age composition ; Age groups ; Biodiversity ; Brackishwater environment ; Estuaries ; Fish ; FISHERIES ; Indigenous species ; Introduced species ; Invasive species ; Life history ; MARINE & FRESHWATER BIOLOGY ; Marine environment ; Native organisms ; Native species ; Nonnative species ; OCEANOGRAPHY ; Ontogeny ; Opsanus beta ; Otoliths ; Population ; Salinity ; Shape ; Variation ; Wildlife conservation</subject><ispartof>Latin american journal of aquatic research, 2022-03, Vol.50 (1), p.124-134</ispartof><rights>COPYRIGHT 2022 Pontificia Universidad Catolica de Valparaiso, Escuela de Ciencias del Mar</rights><rights>2022. This work is published under https://creativecommons.org/licenses/by-nc-nd/3.0/ (the “License”). 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Am. J. Aquat. Res</addtitle><description>Invasive species are among the most important problems for biodiversity conservation worldwide, particularly in megadiverse countries such as Brazil. However, there is no biological information to develop policies for managing invasive species populations in many cases. The life history parameters and otolith variations are essential to understanding the adaptations of the species introduced in marine environments. This study aimed to identify the age structure and ontogenetic variation in the sagitta otolith of Opsanus beta. Fish samples were obtained monthly in the Paranaguá Estuarine Complex (PEC), south of Brazil. The shape indices verified ontogenetic variations in the otoliths (PERMANOVA; F = 110; P < 0.0001), but no sexual variations were observed in the shape of the otoliths (PERMANOVA; F = 3.65; P > 0.05). Specimen aged between 1 to 9 years were observed in the PEC, with the highest occurrence of individuals between 3 and 6 years (78%). No sexual differences were observed between the ages by the Kimura test. 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Am. J. Aquat. Res</addtitle><date>2022-03-01</date><risdate>2022</risdate><volume>50</volume><issue>1</issue><spage>124</spage><epage>134</epage><pages>124-134</pages><issn>0718-560X</issn><eissn>0718-560X</eissn><abstract>Invasive species are among the most important problems for biodiversity conservation worldwide, particularly in megadiverse countries such as Brazil. However, there is no biological information to develop policies for managing invasive species populations in many cases. The life history parameters and otolith variations are essential to understanding the adaptations of the species introduced in marine environments. This study aimed to identify the age structure and ontogenetic variation in the sagitta otolith of Opsanus beta. Fish samples were obtained monthly in the Paranaguá Estuarine Complex (PEC), south of Brazil. The shape indices verified ontogenetic variations in the otoliths (PERMANOVA; F = 110; P < 0.0001), but no sexual variations were observed in the shape of the otoliths (PERMANOVA; F = 3.65; P > 0.05). Specimen aged between 1 to 9 years were observed in the PEC, with the highest occurrence of individuals between 3 and 6 years (78%). No sexual differences were observed between the ages by the Kimura test. Our results confirm that the O. beta population is well established with age groups similar to that observed in the region where the species is native.</abstract><cop>Valparaiso</cop><pub>Pontificia Universidad Catolica de Valparaiso, Escuela de Ciencias del Mar</pub><doi>10.3856/vol50-issue1-fulltext-2743</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0003-3321-311X</orcidid><orcidid>https://orcid.org/0000-0001-6543-7439</orcidid><orcidid>https://orcid.org/0000-0002-3399-4772</orcidid><orcidid>https://orcid.org/0000-0003-0122-0980</orcidid><orcidid>https://orcid.org/0000-0001-7958-427X</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Adaptation Age Age composition Age groups Biodiversity Brackishwater environment Estuaries Fish FISHERIES Indigenous species Introduced species Invasive species Life history MARINE & FRESHWATER BIOLOGY Marine environment Native organisms Native species Nonnative species OCEANOGRAPHY Ontogeny Opsanus beta Otoliths Population Salinity Shape Variation Wildlife conservation |
title | Age, growth, and ontogenetic variation in the sagitta otolith of Opsanus beta (Goode & Bean, 1880), a non-native species in a wetland of international importance |
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