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Provedor de dados:  Biological Sciences
País:  Brazil
Título:  Population structure of fishes from an urban stream
Autores:  Zanatta, Naiara
Pazianoto, Laryssa Helena Ribeiro
Cionek, Vivian de Mello
Sacramento, Patrícia Almeida
Benedito, Evanilde
Data:  2017-05-03
Ano:  2017
Palavras-chave:  Sex ratio
Reproduction
Population attributes.
Resumo:   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. 
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31899

10.4025/actascibiolsci.v39i1.31899
Editor:  Universidade Estadual De Maringá
Relação:  http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31899/pdf
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/31899/12418
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/31899/12419
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/31899/12420
Formato:  application/pdf
Fonte:  Acta Scientiarum. Biological Sciences; v. 39, n. 1 (2017); 27-34

Acta Scientiarum. Biological Sciences; v. 39, n. 1 (2017); 27-34

1807-863X

1679-9283
Direitos:  Direitos autorais 2017 Acta Scientiarum. Biological Sciences
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