| Registro completo |
| Provedor de dados: |
Biological Sciences
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| País: |
Brazil
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| Título: |
Atividade alimentar da curvina Plagioscion squamosissimus (Heckel, 1840) (Perciformes, Sciaenidae) no rio Paraná
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river
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| Autores: |
Hahn, Norma Segatti; UEM
Loureiro, Valdirene Esgarbosa; UEM
Delariva, Rosilene Luciana; UEM
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| Data: |
1999-07-17
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| Ano: |
1999
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| Palavras-chave: |
2.00.00.00-6 Ciências Biológicas atividade alimentar
Variações temporais
Plagioscion squamosissimus
Reservatório
Planície de inundação 2.00.00.00-6 Ciências Biológicas
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| Resumo: |
Curvina Plagioscion squamosissimus (Heckel, 1840) feeding activity at the upper Paraná river floodplain (Porto Rico region, state of Paraná, Brazil) and Itaipu reservoir was investigated. The fishes were collected monthly with different mesh-sized gill nets October, 1986 through September, 1989 at upper Paraná river and November, 1983 through February, 1989 at Itaipu reservoir. The nets were set for 24 hours and the fishes were collected at sunrise (7A.M.), afternoon (3P.M.) and night (11P.M.) at Itaipu reservoir and each, three hours at upper Paraná river floodplain to determine daily feeding rhythm. Stomach repletion degree and food update frequency were used as stomach repletion indices. In both environments a high incidence of empty stomachs was registered. The annual variations of these indices were more pronounced in Itaipu reservoir. In terms of seasonal variations, feeding activities showed a higher frequency in hot seasons. Daily food intake showed to be more intense at early morning hours revealing that this species is a diurnal predator that uses visual stimulus to detect and pursue its preys.
Curvina Plagioscion squamosissimus (Heckel, 1840) feeding activity at the upper Paraná river floodplain (Porto Rico region, state of Paraná, Brazil) and Itaipu reservoir was investigated. The fishes were collected monthly with different mesh-sized gill nets October, 1986 through September, 1989 at upper Paraná river and November, 1983 through February, 1989 at Itaipu reservoir. The nets were set for 24 hours and the fishes were collected at sunrise (7A.M.), afternoon (3P.M.) and night (11P.M.) at Itaipu reservoir and each, three hours at upper Paraná river floodplain to determine daily feeding rhythm. Stomach repletion degree and food update frequency were used as stomach repletion indices. In both environments a high incidence of empty stomachs was registered. The annual variations of these indices were more pronounced in Itaipu reservoir. In terms of seasonal variations, feeding activities showed a higher frequency in hot seasons. Daily food intake showed to be more intense at early morning hours revealing that this species is a diurnal predator that uses visual stimulus to detect and pursue its preys.
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| Idioma: |
Português
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4438
10.4025/actascibiolsci.v21i0.4438
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| Editor: |
Universidade Estadual De Maringá
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Biological Sciences; v. 21 (1999); 309-314
Acta Scientiarum. Biological Sciences; v. 21 (1999); 309-314
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| Direitos: |
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).
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