Data/hora: 01/06/2024 06:18:48

Provedor de dados: | Acta Scientiarum: Biological Sciences
País: | Brazil
Título: | Reproductive strategies of fish populations from three Neotropical streams - doi: 10.4025/actascibiolsci.v35i2.10932
Autores: | Zanatta, Naiara; Universidade Estadual de Maringá; Cionek, Vivian de Mello; Universidade Estadual de Maringá; Benedito, Evanilde; Universidade Estadual de Maringá.
Data: | 2013-05-06
Ano: | 2013
Palavras-chave: | 2.00.00.00-6 upper Paraná river basin; Sex ratio; Conservation unit; Reproductive stages 2.05.02.00-1.
Resumo: | This study aimed to characterize the reproductive strategies of fish from first order streams. Samplings were performed every three months from June 2008 to March 2009, using electric fishing at three streams: Conceição, Scherer and Jurema, located in the municipalities of Diamante do Norte and Amaporã, Paraná State, Brazil. We obtained the total weight (g), standard or total length (cm), sex and maturation stage for each specimen. Limnological data were obtained with portable equipments. The minimum length at first maturation was established for each population, and reproduction period was determined by analyzing the distribution of maturation stages. The sex ratio was obtained and tested (X2) for significant differences. Eight species were analyzed and they responded differently to environmental pressures, reflected in the ratio between males and females, and in different reproductive strategies adopted. The streams were used as spawning ground in September and rest and recruitment areas in December and March, due to changes in the limnological parameters that signalize favorable periods for reproduction. We conclude that the protection provided by preserved riparian vegetation encourage the uptake of food by fishes and maintain their general physical characteristics, promoting the diversification in tactics found.
Tipo: | Reprodução
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10932

10.4025/actascibiolsci.v35i2.10932

Editor: | Universidade Estadual De Maringá

Formato:

application/pdf

application/pdf

Fonte:

Acta Scientiarum. Biological Sciences; v. 35, n. 2 (2013); 185-194

Acta Scientiarum. Biological Sciences; v. 35, n. 2 (2013); 185-194

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).