Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed stream
The species Hyphessobrycon bifasciatus, also known as the 'lemon tetra', is a small characin fish distributed in coastal rivers from the southern state of Bahia to the state of Rio Grande do Sul, and also in the upper Paraná river basin, found in small rivers and lagoons. Its diet varies...
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Universidade Estadual de Maringá
2024-12-01
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| Series: | Acta Scientiarum: Biological Sciences |
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| Online Access: | https://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/71181 |
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| author | Thiago Mündel Ribeiro Santos Julia Fernanda de Camargo Teles Miranda Talita Rolim de Freitas Lima Flavia Conceição de Paiva Natalia Silva Alves Welber Senteio Smith |
| author_facet | Thiago Mündel Ribeiro Santos Julia Fernanda de Camargo Teles Miranda Talita Rolim de Freitas Lima Flavia Conceição de Paiva Natalia Silva Alves Welber Senteio Smith |
| author_sort | Thiago Mündel Ribeiro Santos |
| collection | DOAJ |
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The species Hyphessobrycon bifasciatus, also known as the 'lemon tetra', is a small characin fish distributed in coastal rivers from the southern state of Bahia to the state of Rio Grande do Sul, and also in the upper Paraná river basin, found in small rivers and lagoons. Its diet varies between small invertebrates and plant debris. They are oviparous animals that lay their eggs on the bottom or in groups of plants, which hatch approximately two days after fertilization. In light of this, the present study aimed to describe the population structure of H. bifasciatus in terms of feeding and length-weight relationship in a dammed neotropical stream located in the municipality of São Roque, SP, Brazil. Specimens of H. bifasciatus were captured in two collection campaigns (November 2021 and July 2022). The fish were collected using a three-meter-long trawl net, with a 1 cm mesh and a sampling effort of 30 minutes at each point. Subsequently, they were transported to the laboratory, where their length and standard weight were recorded, along with their stomach contents. A total of 101 specimens were analyzed, 41 females and 60 males. The species had an average body length of 2.5 ± 0.46 cm and an average total weight of 0.33 ± 0.19 g for females, and 2.8 ± 0.60 cm and 0.45 ± 0.27 g for males. We obtained a length-weight relationship of y = 0.4317x - 0.7574, R² = 0.9393 for males, and y = 0.3413x - 0.5237, R² = 0.8704 for females. The size range varies from the 1.6-2.0 centimeter class to the 3.6-4.0 centimeter class. The main food items were plant material and filamentous algae, abundant in both sexes. Finally, it is concluded that this species forms large schools near macrophytes, exhibits peaceful behavior, and feeds mainly on plant items.
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| format | Article |
| id | doaj-art-4da443f81d094cb6bae6e2df0072da86 |
| institution | Kabale University |
| issn | 1679-9283 1807-863X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Universidade Estadual de Maringá |
| record_format | Article |
| series | Acta Scientiarum: Biological Sciences |
| spelling | doaj-art-4da443f81d094cb6bae6e2df0072da862024-12-03T18:54:31ZengUniversidade Estadual de MaringáActa Scientiarum: Biological Sciences1679-92831807-863X2024-12-0146110.4025/actascibiolsci.v46i1.71181Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed streamThiago Mündel Ribeiro Santos0Julia Fernanda de Camargo Teles Miranda1Talita Rolim de Freitas Lima2Flavia Conceição de Paiva3Natalia Silva Alves4Welber Senteio Smith5Universidade PaulistaUniversidade PaulistaUniversidade PaulistaUniversidade Paulista / Instituto de PescaUniversidade Paulista / Instituto de PescaUniversidade Paulista / Universidade Paulista The species Hyphessobrycon bifasciatus, also known as the 'lemon tetra', is a small characin fish distributed in coastal rivers from the southern state of Bahia to the state of Rio Grande do Sul, and also in the upper Paraná river basin, found in small rivers and lagoons. Its diet varies between small invertebrates and plant debris. They are oviparous animals that lay their eggs on the bottom or in groups of plants, which hatch approximately two days after fertilization. In light of this, the present study aimed to describe the population structure of H. bifasciatus in terms of feeding and length-weight relationship in a dammed neotropical stream located in the municipality of São Roque, SP, Brazil. Specimens of H. bifasciatus were captured in two collection campaigns (November 2021 and July 2022). The fish were collected using a three-meter-long trawl net, with a 1 cm mesh and a sampling effort of 30 minutes at each point. Subsequently, they were transported to the laboratory, where their length and standard weight were recorded, along with their stomach contents. A total of 101 specimens were analyzed, 41 females and 60 males. The species had an average body length of 2.5 ± 0.46 cm and an average total weight of 0.33 ± 0.19 g for females, and 2.8 ± 0.60 cm and 0.45 ± 0.27 g for males. We obtained a length-weight relationship of y = 0.4317x - 0.7574, R² = 0.9393 for males, and y = 0.3413x - 0.5237, R² = 0.8704 for females. The size range varies from the 1.6-2.0 centimeter class to the 3.6-4.0 centimeter class. The main food items were plant material and filamentous algae, abundant in both sexes. Finally, it is concluded that this species forms large schools near macrophytes, exhibits peaceful behavior, and feeds mainly on plant items. https://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/71181Condition factor; habitat; dam; trophic guild; stomach content. |
| spellingShingle | Thiago Mündel Ribeiro Santos Julia Fernanda de Camargo Teles Miranda Talita Rolim de Freitas Lima Flavia Conceição de Paiva Natalia Silva Alves Welber Senteio Smith Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed stream Acta Scientiarum: Biological Sciences Condition factor; habitat; dam; trophic guild; stomach content. |
| title | Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed stream |
| title_full | Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed stream |
| title_fullStr | Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed stream |
| title_full_unstemmed | Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed stream |
| title_short | Population structure and weight-length relationship of Hyphessobrycon bifasciatus Ellis 1911 in a dammed stream |
| title_sort | population structure and weight length relationship of hyphessobrycon bifasciatus ellis 1911 in a dammed stream |
| topic | Condition factor; habitat; dam; trophic guild; stomach content. |
| url | https://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/71181 |
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