Data/hora: 03/06/2024 18:23:09

Provedor de dados: | 3
País: | Brazil

Título:

Population biology of dominant fish species of the Santa Bárbara river, a tributary of the Nova Avanhandava reservoir (low Tietê river, São Paulo State, Brazil) - DOI: 10.4025/actascibiolsci.v31i1.650

Population biology of dominant fish species of the Santa Bárbara River, a tributary of Nova Avanhandava Reservoir (low Tietê River, São Paulo State, Brazil) - DOI: 10.4025/actascibiolsci.v31i1.650

Autores: | Vidotto, Ana Paula; UNESP; Carvalho, Edmir Daniel; UNESP.
Data: | 2009-04-16
Ano: | 2009
Palavras-chave: | 2.01.00.00-0 Biologia Geral reservoir; Tietê river; Population biology; Plagioscion squamosissimus; Astyanax altiparanae; Serrasalmus maculatus Recursos Pesqueiros e Engenharia de Pesca.
Resumo: | The aim of this study is to characterize some population biology parameters of P. squamosissimus, A. altiparanae and S. maculates, the dominant fish species of the Santa Bárbara river, a tributary of the Nova Avanhandava reservoir, low Tietê river. Fish samplings were performed monthly between September/2002 and August/2003, using gill nets with different mesh sizes. Females of all species have larger standard lengths than males (Mann-Whitney, p &lt; 0.0001), and are more frequent in superior size classes (Kolmogorov-Smirnov, p &lt; 0.0001). All populations presented isometric growth, but differences between males and females were observed. Only P. squamosissimus presented a gender ratio different from 1:1, with a higher proportion of males (1:2, &amp;chi;2, p &lt; 0.05). The onset of gonadal maturation occurs at 15 cm in P. squamosissimus, 9 cm in S. maculates and at 8.9 cm in A. altiparanae. In all species populations, the adults predominate over juveniles. The allometric condition factor (K) of P. squamosissimus and S. maculates presented higher values in the periods from March-May and June-August, and A. altiparanae in the period from March-May (Kruskal-Wallis, p &lt; 0.05). These results indicate that the populations successfully exploit the lentic environment, and present life cycle tactics adapted to their particular means of environment occupation.
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/650

10.4025/actascibiolsci.v31i1.650

Editor: | Universidade Estadual De Maringá
Formato: | application/pdf

Fonte:

Acta Scientiarum. Biological Sciences; v. 31, n. 1 (2009); 55-63

Acta Scientiarum. Biological Sciences; v. 31, n. 1 (2009); 55-63

Fonte:

DECLARATION OF ORIGINALITY AND CESSATION OF COPYRIGHTI Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal. I also declare that once published in the Acta Scientiarum. Biological Sciences, a publication of the Universidade Estadual de Maringá, it will not be submitted by me or by any co-author to any other scientific communication mean. In my name and in the name of co-authors, I shall cede the copyright of the above mentioned article to the Universidade Estadual de Maringá and I declare that I know that the non-observance of this norm may make me liable for the penalties contemplated in the Law for the Protection of Authors’ Rights (Act 9609 of the 19th February 1998).

DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAIS  Declaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Biological Sciences, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).