Data/hora: 17/06/2024 03:38:40

Provedor de dados: 	Acta Scientiarum: Biological Sciences	
País: 	Brazil	
Título: 	Diet composition and food overlap of Acestrorhynchus britskii and A. lacustris (Characiformes:  Acestrorhynchidae) from Sobradinho reservoir, São Francisco river, Bahia State - doi: 10.4025/actascibiolsci.v33i4.7240

Diet composition and food overlap of Acestrorhynchus britskii and A. lacustris (Characiformes:  Acestrorhynchidae) from Sobradinho reservoir, São Francisco river, Bahia State - doi: 10.4025/actascibiolsci.v33i4.7240	
Autores: 	Rocha, Aline Alves Ferreira da; Universidade Federal Rural de Pernambuco; Santos, Natália Carneiro Lacerda dos; Universidade Federal Rural de Pernambuco; Pinto, Gabriela de Araújo; niversidade Federal Rural de Pernambuco; Medeiros, Tatiane do Nascimento; Universidade Federal Rural de Pernambuco; Severi, William; Universidade Federal Rural de Pernambuco.	
Data: 	2011-09-02	
Ano: 	2011	
Palavras-chave: 	2.05.00.00-9 natural feeding; Peixe-cachorro; Piscivory Ecologia natural feeding; Peixe-cachorro; Piscivory.	
Resumo: 	Fish diet studies contribute to understanding resource partitioning and community trophic structure. The present paper characterizes the diet of “peixe-cachorro” species Acestrorhynchus britskii and A. lacustris in Sobradinho reservoir, Bahia State, Brazil. Bimonthly samples (November 2006 to July 2008) were taken in the lotic, transition and lentic stretches of the reservoir, using gillnets overnight. A total of 899 A. britskii and 476 A. lacustris stomachs were analyzed, 70% of which were empty. Their content indicated the species are predominantly piscivorous, with 18 prey fish species identified. However, each prey occurred in a single month, except for Anchoviella vaillanti, recorded in 80% of months for A. bristski, and Tetragonopterus chalceus in 25% for A. lacustris. The species presented high food overlap (C&amp;lambda; = 0.992), owing to the occurrence of Actinopterygii (bits) and Actinopterygii in all months. Regarding prey fish alone, a differentiated intake and lower food overlap was detected, in the flood (C&amp;lambda; = 0.427) and drought (C&amp;lambda; = 0.172) seasons, in the lotic (C&amp;lambda; = 0.434), transition (C&amp;lambda; = 0.089) and lentic (C&amp;lambda; = 0) stretches, and in overall overlap (C&amp;lambda; = 0.236). The spatial and seasonal differences in the intake of different prey fish by both species suggest an opportunistic feeding habit and a competition reduction mechanism for food resources.	
Tipo: 	Alimentação	
Idioma: 	Português	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7240

10.4025/actascibiolsci.v33i4.7240	
Editor: 	Universidade Estadual De Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/7240/35828

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/7240/36993

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/7240/36994

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/7240/36995	
Formato: 	application/pdf

application/pdf	
Fonte: 	Acta Scientiarum. Biological Sciences; v. 33, n. 4 (2011); 407-415

Acta Scientiarum. Biological Sciences; v. 33, n. 4 (2011); 407-415	
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).