Vol 9 Num 3




Fish assemblage structure in a marginal lake disconnected from the submedium São Francisco river, Pernambuco

Sandra Cristina Soares da Luz

Universidade Federal Rural de Pernambuco
UFRPE - Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aqüicultura, Laboratório de Ictiologia. Rua Dom Manoel de Medeiros - s/n, Dois Irmãos, Recife, PE, Brasil, CEP 52.171-900
email: sandracluz7@hotmail.com

Ana Carla Asfora El-Deir

Universidade Federal Rural de Pernambuco
UFRPE - Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aqüicultura, Departamento de Biologia. Rua Dom Manoel de Medeiros - s/n, Dois Irmãos, Recife, PE, Brasil, CEP 52.171-900
Elton José de França

Universidade Federal Rural de Pernambuco
Unidade Acadêmica de Serra Talhada3, Fazenda do Saco - s/n, Caixa Postal - 063, Serra Talhada, PE, Brasil CEP 56.900-000
William Severi

Universidade Federal Rural de Pernambuco
UFRPE - Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aqüicultura, Laboratório de Ictiologia. Rua Dom Manoel de Medeiros - s/n, Dois Irmãos, Recife, PE, Brasil, CEP 52.171-900

keywords
Curralinho, San Francisco, fish, ichthyodiversity

publication date: 07-28-2009





Abstract
Samplings with various fishing devices were undertaken between March 2007 and February 2008, in the Curralinho lake, a marginal pond located in the submedium São Francisco river, aiming at evaluating the fish fauna composition after its isolation from the river channel and water depletion. A total of 4,638 specimens was collected, with a biomass of 129,782.84 g, distributed in 16 families and 47 species from the Orders Characiformes, Cyprinodontiformes, Siluriformes, Perciformes, Gymnotiformes and Clupeiformes. Characiformes were most abundant and 87.3% of the specimens were small (<100 mm) or medium-sized (<200 mm). Among the species collected, 26.7% were constant, 35.6% accessory and 37.8% accidental. Characidae encompasses most of the species and individuals, followed by Acestrorhynchidae. Moenkhausia  costae , Triportheus  guentheri , Pygocentrus  piraya  and Prochilodus  argenteus  were present in all samples. Invertivores and piscivores dominated quantitatively and their biomass indicate a predominance of predators, with detritivores presenting the second greatest biomass. Resident species prevailed, with few individuals of migratory fish belonging to Anostomidae and Prochilodontidae families and Salminus  franciscanus . Fish richness, diversity and equitability were relatively high throughout the period of study. It may be concluded that the Curralinho lake is an important shelter, feeding and resting ground for the ichthyofauna, mainly for forage fish that serve as the basis of the trophic chain and fisheries´ sustainability. Therefore, there is an urgent need of environmental policy and management practices development that would preserve habitat integrity and functionability of their role in the conservation of ichthyodiversity of this stretch of the São Francisco basin.

how to quote this paper
Luz, S.C.S.; Ana Carla Asfora El-Deir, A.C.A.; França, E.J. and Severi, W. Fish assemblage structure in a marginal lake disconnected from the submedium São Francisco river, Pernambuco. Biota Neotrop.  Jul/Sep 2009 vol. 9, no. 3 http://www.biotaneotropica.org.br/v9n3/en/abstract?article+bn01809032009 ISSN 1676-0603.

Cited species
check for this species in other resources Moenkhausia  costae 
check for this species in other resources Prochilodus  argenteus 
check for this species in other resources Pygocentrus  piraya 
check for this species in other resources Salminus  franciscanus 
check for this species in other resources Triportheus  guentheri 



Fundação de Amparo à Pesquisa do Estado de São Paulo, Fapesp
Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq
© BIOTA NEOTROPICA, 2009