Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers
Abstract The age and growth of Pseudoplatystoma corruscans, is analyzed on specimens landed in Puerto Antequera, Province of Chaco, Argentina. The study is based on length frequency distribution of 1192 individuals and growth marks of 293 pectoral spines. Previously to age assignation based on spine...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
2021-06-01
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000200205&tlng=en |
| _version_ | 1818744588532187136 |
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| author | Leandro Balboni Facundo Vargas Darío Colautti |
| author_facet | Leandro Balboni Facundo Vargas Darío Colautti |
| author_sort | Leandro Balboni |
| collection | DOAJ |
| description | Abstract The age and growth of Pseudoplatystoma corruscans, is analyzed on specimens landed in Puerto Antequera, Province of Chaco, Argentina. The study is based on length frequency distribution of 1192 individuals and growth marks of 293 pectoral spines. Previously to age assignation based on spines readings, we performed analyses that ruled out age-associated resorption of rings and corroborated the annual periodicity of mark formation. The average sizes of the radius of each ring were obtained, and the total length of fish were back-calculated to the time of the ring formation, by the regression model fitted between the total radius of the spines to the respective sizes of each fish. Such data showed a good fitting to growth models of von Bertalanffy, Gompertz and logistic for both sexes separately. Results indicate that the study of the species growth must be carried out for each sex separately and that the fishing regulations must consider this characteristic of the species since the current management guidelines could be promoting differential capture by sexes. |
| first_indexed | 2024-12-18T02:46:42Z |
| format | Article |
| id | doaj.art-ea992291d4e74e1ab4cf23f661081b43 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-18T02:46:42Z |
| publishDate | 2021-06-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-ea992291d4e74e1ab4cf23f661081b432022-12-21T21:23:32ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242021-06-0119210.1590/1982-0224-2020-0101Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay riversLeandro Balbonihttps://orcid.org/0000-0002-7411-1569Facundo Vargashttps://orcid.org/0000-0001-5349-0347Darío Colauttihttps://orcid.org/0000-0002-8896-4255Abstract The age and growth of Pseudoplatystoma corruscans, is analyzed on specimens landed in Puerto Antequera, Province of Chaco, Argentina. The study is based on length frequency distribution of 1192 individuals and growth marks of 293 pectoral spines. Previously to age assignation based on spines readings, we performed analyses that ruled out age-associated resorption of rings and corroborated the annual periodicity of mark formation. The average sizes of the radius of each ring were obtained, and the total length of fish were back-calculated to the time of the ring formation, by the regression model fitted between the total radius of the spines to the respective sizes of each fish. Such data showed a good fitting to growth models of von Bertalanffy, Gompertz and logistic for both sexes separately. Results indicate that the study of the species growth must be carried out for each sex separately and that the fishing regulations must consider this characteristic of the species since the current management guidelines could be promoting differential capture by sexes.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000200205&tlng=enFisheries managementGrowth modelsPectoral spine |
| spellingShingle | Leandro Balboni Facundo Vargas Darío Colautti Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers Neotropical Ichthyology Fisheries management Growth models Pectoral spine |
| title | Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers |
| title_full | Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers |
| title_fullStr | Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers |
| title_full_unstemmed | Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers |
| title_short | Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers |
| title_sort | age and growth of pseudoplatystoma corruscans siluriformes pimelodidae at the confluence of the parana and paraguay rivers |
| topic | Fisheries management Growth models Pectoral spine |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000200205&tlng=en |
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