<b>Population structure of fishes from an urban stream
The aim of this study was to identify the population structure of the ichthyofauna in an urban stream within an environmental protection area in southern Brazil. Quarterly samplings were conducted between October 2009 and August 2010. Poecilia reticulata was the most abundant species, followed by...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Maringá
2017-05-01
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| Series: | Acta Scientiarum: Biological Sciences |
| Subjects: | |
| Online Access: | https://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31899 |
| _version_ | 1811230451101073408 |
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| author | Naiara Zanatta Laryssa Helena Ribeiro Pazianoto Vivian de Mello Cionek Patrícia Almeida Sacramento Evanilde Benedito |
| author_facet | Naiara Zanatta Laryssa Helena Ribeiro Pazianoto Vivian de Mello Cionek Patrícia Almeida Sacramento Evanilde Benedito |
| author_sort | Naiara Zanatta |
| collection | DOAJ |
| description |
The aim of this study was to identify the population structure of the ichthyofauna in an urban stream within an environmental protection area in southern Brazil. Quarterly samplings were conducted between October 2009 and August 2010. Poecilia reticulata was the most abundant species, followed by Hypostomus ancistroides and Rhamdia quelen. It was found a higher proportion of adults instead of juveniles from P. reticulata and R. quelen populations, while the opposite was recorded for H. ancistroides. Sex ratio of 1:1 was found for H. ancistroides, but differed significantly for P. reticulata and R. quelen. Females of P. reticulata and R. quelen reached higher length than males in the smaller and higher length-classes, while H. ancistroides females were only longer in initial length-classes. It was recorded higher occurrence of mature and maturing individuals. Mature individuals of H. ancistroides were sampled in October, and P. reticulata and R. quelen throughout the sampling period. Despite adverse environmental conditions, the occurrence of juveniles indicates reproductive activity for these species. Population structure studies in degraded systems are urgent, since life-history features of species may suffer changes due to anthropic impacts. Providing such information contributes to decision making and management of degraded systems.
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| first_indexed | 2024-04-12T10:29:33Z |
| format | Article |
| id | doaj.art-b0678d2c73ec44bfad75667556b628a4 |
| institution | Directory Open Access Journal |
| issn | 1679-9283 1807-863X |
| language | English |
| last_indexed | 2024-04-12T10:29:33Z |
| publishDate | 2017-05-01 |
| publisher | Universidade Estadual de Maringá |
| record_format | Article |
| series | Acta Scientiarum: Biological Sciences |
| spelling | doaj.art-b0678d2c73ec44bfad75667556b628a42022-12-22T03:36:53ZengUniversidade Estadual de MaringáActa Scientiarum: Biological Sciences1679-92831807-863X2017-05-0139110.4025/actascibiolsci.v39i1.3189915201<b>Population structure of fishes from an urban streamNaiara Zanatta0Laryssa Helena Ribeiro Pazianoto1Vivian de Mello Cionek2Patrícia Almeida Sacramento3Evanilde Benedito4Universidade Estadual de MaringáUniversidade Estadual de MaringáUniversidade do Estado de Santa CatarinaUniversidade Estadual de MaringáUniversidade Estadual de Maringá The aim of this study was to identify the population structure of the ichthyofauna in an urban stream within an environmental protection area in southern Brazil. Quarterly samplings were conducted between October 2009 and August 2010. Poecilia reticulata was the most abundant species, followed by Hypostomus ancistroides and Rhamdia quelen. It was found a higher proportion of adults instead of juveniles from P. reticulata and R. quelen populations, while the opposite was recorded for H. ancistroides. Sex ratio of 1:1 was found for H. ancistroides, but differed significantly for P. reticulata and R. quelen. Females of P. reticulata and R. quelen reached higher length than males in the smaller and higher length-classes, while H. ancistroides females were only longer in initial length-classes. It was recorded higher occurrence of mature and maturing individuals. Mature individuals of H. ancistroides were sampled in October, and P. reticulata and R. quelen throughout the sampling period. Despite adverse environmental conditions, the occurrence of juveniles indicates reproductive activity for these species. Population structure studies in degraded systems are urgent, since life-history features of species may suffer changes due to anthropic impacts. Providing such information contributes to decision making and management of degraded systems. https://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31899sex ratioreproductionpopulation attributes. |
| spellingShingle | Naiara Zanatta Laryssa Helena Ribeiro Pazianoto Vivian de Mello Cionek Patrícia Almeida Sacramento Evanilde Benedito <b>Population structure of fishes from an urban stream Acta Scientiarum: Biological Sciences sex ratio reproduction population attributes. |
| title | <b>Population structure of fishes from an urban stream |
| title_full | <b>Population structure of fishes from an urban stream |
| title_fullStr | <b>Population structure of fishes from an urban stream |
| title_full_unstemmed | <b>Population structure of fishes from an urban stream |
| title_short | <b>Population structure of fishes from an urban stream |
| title_sort | b population structure of fishes from an urban stream |
| topic | sex ratio reproduction population attributes. |
| url | https://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31899 |
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