<b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central Brazil
Brycon nattereri is a threatened fish species restricted to small headwater rivers of the Paraná, São Francisco and Tocantins rivers. This species has been extirpated from many sites, and little is known about its ecology. In this sense, the present study investigated temporal variations in the occu...
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Maringá
2014-10-01
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| Series: | Acta Scientiarum: Biological Sciences |
| Subjects: | |
| Online Access: | http://186.233.154.254/ojs/index.php/ActaSciBiolSci/article/view/23857 |
| _version_ | 1811226691191701504 |
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| author | Oscar Barroso Vitorino Júnior Kelven Stella Lopes Fernando Mayer Pelicice |
| author_facet | Oscar Barroso Vitorino Júnior Kelven Stella Lopes Fernando Mayer Pelicice |
| author_sort | Oscar Barroso Vitorino Júnior |
| collection | DOAJ |
| description | Brycon nattereri is a threatened fish species restricted to small headwater rivers of the Paraná, São Francisco and Tocantins rivers. This species has been extirpated from many sites, and little is known about its ecology. In this sense, the present study investigated temporal variations in the occurrence, abundance and length structure of B. nattereri in the Dois Irmãos river, a small headwater river from the Tocantins river basin. Samples were taken monthly between January and November of 2009 and 2010. The studied site comprised a 4.5 km river stretch, sampled with an active fishing method (fly fishing). Individuals caught were counted, measured and returned immediately to the river. We caught 302 individuals along two years. Brycon nattereri was present in the studied stretch in all sampling months, with higher abundance between November and May (wet season). We registered a wide range of lengths, with predominance of adult fish; young were captured in July and August, indicating recruitment in the region. The present study, therefore, showed that populations of B. nattereri, an endangered fish species, still persist in small headwater rivers of the upperTocantins river. |
| first_indexed | 2024-04-12T09:29:35Z |
| format | Article |
| id | doaj.art-af0e2c63bc394248914eb5f1800ab28d |
| institution | Directory Open Access Journal |
| issn | 1679-9283 1807-863X |
| language | English |
| last_indexed | 2024-04-12T09:29:35Z |
| publishDate | 2014-10-01 |
| publisher | Universidade Estadual de Maringá |
| record_format | Article |
| series | Acta Scientiarum: Biological Sciences |
| spelling | doaj.art-af0e2c63bc394248914eb5f1800ab28d2022-12-22T03:38:24ZengUniversidade Estadual de MaringáActa Scientiarum: Biological Sciences1679-92831807-863X2014-10-0136442142510.4025/actascibiolsci.v36i4.2385711489<b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central BrazilOscar Barroso Vitorino Júnior0Kelven Stella Lopes1Fernando Mayer Pelicice2Universidade Federal do TocantinsMinistério da Pesca e AquiculturaUniversidade Federal do TocantinsBrycon nattereri is a threatened fish species restricted to small headwater rivers of the Paraná, São Francisco and Tocantins rivers. This species has been extirpated from many sites, and little is known about its ecology. In this sense, the present study investigated temporal variations in the occurrence, abundance and length structure of B. nattereri in the Dois Irmãos river, a small headwater river from the Tocantins river basin. Samples were taken monthly between January and November of 2009 and 2010. The studied site comprised a 4.5 km river stretch, sampled with an active fishing method (fly fishing). Individuals caught were counted, measured and returned immediately to the river. We caught 302 individuals along two years. Brycon nattereri was present in the studied stretch in all sampling months, with higher abundance between November and May (wet season). We registered a wide range of lengths, with predominance of adult fish; young were captured in July and August, indicating recruitment in the region. The present study, therefore, showed that populations of B. nattereri, an endangered fish species, still persist in small headwater rivers of the upperTocantins river.http://186.233.154.254/ojs/index.php/ActaSciBiolSci/article/view/23857fish populationseasonalityconservationheadwaterTocantins river |
| spellingShingle | Oscar Barroso Vitorino Júnior Kelven Stella Lopes Fernando Mayer Pelicice <b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central Brazil Acta Scientiarum: Biological Sciences fish population seasonality conservation headwater Tocantins river |
| title | <b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central Brazil |
| title_full | <b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central Brazil |
| title_fullStr | <b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central Brazil |
| title_full_unstemmed | <b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central Brazil |
| title_short | <b>Abundance and length structure of <i>Brycon nattereri</i> (Osteichthyes, Bryconidae), an endangered fish species in central Brazil |
| title_sort | b abundance and length structure of i brycon nattereri i osteichthyes bryconidae an endangered fish species in central brazil |
| topic | fish population seasonality conservation headwater Tocantins river |
| url | http://186.233.154.254/ojs/index.php/ActaSciBiolSci/article/view/23857 |
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