THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS
This paper focuses on to evaluate the importance of a free stretches upstream of a Neotropical reservoir for the maintenance of Schizodon intermedius populations, a medium size migratory species and important fisheries resources. Quarterly samplings were carried out in 8 sampling sites, distributed...
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Instituto de Pesca
2019-02-01
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| Series: | Boletim do Instituto de Pesca |
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| Online Access: | https://institutodepesca.org/index.php/bip/article/view/1341 |
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| author | Felipe Pontieri de Lima André Batista Nobile Diogo Freitas-Souza Jaciara Vanessa Kruger Paes Sandro Geraldo de Castro Britto Ana Paula Vidotto-Magnoni |
| author_facet | Felipe Pontieri de Lima André Batista Nobile Diogo Freitas-Souza Jaciara Vanessa Kruger Paes Sandro Geraldo de Castro Britto Ana Paula Vidotto-Magnoni |
| author_sort | Felipe Pontieri de Lima |
| collection | DOAJ |
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This paper focuses on to evaluate the importance of a free stretches upstream of a Neotropical reservoir for the maintenance of Schizodon intermedius populations, a medium size migratory species and important fisheries resources. Quarterly samplings were carried out in 8 sampling sites, distributed in Jurumirim Reservoir and two tributaries upstream reservoir. Reproductive, populational and feeding strategies were used to evaluate the importance of each sample area in the biological cycle of this species. Results showed that S. intermedius makes different uses of the sites. In the rainy season, individuals in the lower areas presented higher condition factor and average repletion degree of stomach, assuming that are used for growth and feeding and; in the upper areas, higher size and GSi values, suggesting that are reproductive area. We conclude that Schizodon intermedius uses lentic areas to gain energy in dry season, and in the rainy season, uses this energy to migrate to lotic stretches to reproduction. The stretches upstream free of dam are essential for this migratory species maintain viable populations in an environment impaired by dams.
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| format | Article |
| id | doaj-art-f3adfb1eb8df45c8a0adcfe65f4e6c1f |
| institution | DOAJ |
| issn | 1678-2305 |
| language | English |
| publishDate | 2019-02-01 |
| publisher | Instituto de Pesca |
| record_format | Article |
| series | Boletim do Instituto de Pesca |
| spelling | doaj-art-f3adfb1eb8df45c8a0adcfe65f4e6c1f2025-08-20T03:06:32ZengInstituto de PescaBoletim do Instituto de Pesca1678-23052019-02-0145110.20950/1678-2305.2019.45.1.403THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONSFelipe Pontieri de Lima0André Batista Nobile1Diogo Freitas-Souza2Jaciara Vanessa Kruger Paes3Sandro Geraldo de Castro Britto4Ana Paula Vidotto-Magnoni5Universidade Estadual Paulista - UNESP, Instituto de Biociências de Botucatu, Departamento de Morfologia, Laboratório de Biologia e Genética de PeixesUniversidade Estadual Paulista - UNESP, Instituto de Biociências de Botucatu, Departamento de Morfologia, Laboratório de Biologia e Genética de PeixesUniversidade Estadual Paulista - UNESP, Instituto de Biociências de Botucatu, Departamento de Morfologia, Laboratório de Biologia e Genética de PeixesUniversidade Estadual Paulista - UNESP, Instituto de Biociências de Botucatu, Departamento de Morfologia, Laboratório de Biologia e Genética de PeixesUniversidade Estadual Paulista - UNESP, Instituto de Biociências de Botucatu, Departamento de Morfologia, Laboratório de Biologia e Genética de PeixesUniversidade Estadual de Londrina, Departamento de Biologia Animal e Vegetal, Laboratório de Ecologia de Peixes e Invas-µes Biológicas This paper focuses on to evaluate the importance of a free stretches upstream of a Neotropical reservoir for the maintenance of Schizodon intermedius populations, a medium size migratory species and important fisheries resources. Quarterly samplings were carried out in 8 sampling sites, distributed in Jurumirim Reservoir and two tributaries upstream reservoir. Reproductive, populational and feeding strategies were used to evaluate the importance of each sample area in the biological cycle of this species. Results showed that S. intermedius makes different uses of the sites. In the rainy season, individuals in the lower areas presented higher condition factor and average repletion degree of stomach, assuming that are used for growth and feeding and; in the upper areas, higher size and GSi values, suggesting that are reproductive area. We conclude that Schizodon intermedius uses lentic areas to gain energy in dry season, and in the rainy season, uses this energy to migrate to lotic stretches to reproduction. The stretches upstream free of dam are essential for this migratory species maintain viable populations in an environment impaired by dams. https://institutodepesca.org/index.php/bip/article/view/1341fish migrationdamming impactsfisheries ecologyneotropical ichthyofaunafisheries resources |
| spellingShingle | Felipe Pontieri de Lima André Batista Nobile Diogo Freitas-Souza Jaciara Vanessa Kruger Paes Sandro Geraldo de Castro Britto Ana Paula Vidotto-Magnoni THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS Boletim do Instituto de Pesca fish migration damming impacts fisheries ecology neotropical ichthyofauna fisheries resources |
| title | THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS |
| title_full | THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS |
| title_fullStr | THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS |
| title_full_unstemmed | THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS |
| title_short | THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS |
| title_sort | importance of free stretches in a dammed river to the maintenance of schizodon intermedius populations |
| topic | fish migration damming impacts fisheries ecology neotropical ichthyofauna fisheries resources |
| url | https://institutodepesca.org/index.php/bip/article/view/1341 |
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