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Fish fauna of the lower course of the Parnaíba river, northeastern Brazil

2017; Museu de Biologia Professor Mello Leitão; Volume: 38; Issue: 4 Linguagem: Inglês

0103-9121

Filipe Augusto Gonçalves de Melo, Paulo Andreas Buckup, Telton Pedro Anselmo Ramos, Ana Karoline do Nascimento Souza, Crislane Maria Araújo Silva, Teresa Cristina Costa, Alessandra Ribeiro Torres,

Fish Ecology and Management Studies

RESUMO: (Ictiofauna do baixo curso do rio Parnaiba, nordeste do Brasil). A ictiofauna do baixo curso do rio Parnaiba foi investigada atraves de coletas periodicas. Trinta e duas amostragens georeferenciadas foram realizadas: 11 no curso principal do rio Parnaiba, duas no rio Poti, 14 no rio Longa, duas no rio Piracuruca e tres no rio Igaracu. As amostragens foram realizadas durante os anos de 2012 a 2014 com o uso de rede de arrasto, tarrafa, rede de emalhar e puca, capturando-se 2.732 especimes pertencentes a 65 especies distribuidas em 24 familias e 11 ordens. O estudo demonstrou grande similaridade ictiofaunistica entre o baixo rio Parnaiba e a Bacia Amazonica. Uma especie nao descrita, tres endemicas e uma introduzida foram registradas na area de estudo. As ordens predominantes foram Characiformes (34 especies), Siluriformes (13) e Cichliformes (7). Characidae foi a familia com maior numero de especies (18), seguida de Cichlidae (7) e Loricariidae (7). Oito especies tiveram grande abundância e representaram 62,7% do material coletado ( Astyanax lacustris, Curimatella immaculata, Hemigrammus rodwayi , Hyphessobrycon sp., Jupiaba polylepis , Psellogrammus kennedyi , Serrapinnus piaba e Tetragonopterus argenteus ). Astyanax lacustris e Hemigrammus rodwayi tiveram sua area de distribuicao conhecida ampliada para bacia do rio Parnaiba. Foram registradas cinco especies de ambiente estuarino: Anchovia surinamensis , Anchoviella guianensis , Awaous tajasica , Lycengraulis batesii e Microphis lineatus . The fish fauna of the lower Parnaiba river was investigated through systematic collection. Thirty-two geo-referenced sites were sampled in the lower Parnaiba: 11 in the Parnaiba river, two in the Poti river, 14 in the Longa river, three in Igaracu river, and two in Piracuruca river. Sampling was performed during the years 2012 to 2014, using four different type of fishing nets: beach seine, cast net, gillnet and hand net. A total 2,682 specimens which belong to 66 species distributed in 24 families and nine orders were captured. These species demonstrate great ichthyofaunistic similarity between the lower Parnaiba and the Amazon basin. One possibly undescribed, three endemic, and one introduced species were recorded in the area. We report five species from marine or brackish-water habitats: Anchovia surinamensis , Anchoviella guianensis , Lycengraulis batesii, Syngnathus sp. and Awaous tajasica . The predominant orders were Characiformes (35 species), Siluriformes (13) and Perciformes (10). At the family level the Characidae had the greatest number of species (18), followed by Cichlidae (7) and Loricariidae (7). Eight species had high abundance and represented 60.5% of all collected specimens ( Astyanax lacustris, Curimatella immaculata, Hemigrammus rodwayi , Hyphessobrycon sp, Jupiaba polylepis , Psellogrammus kennedyi , Serrapinnus piaba and Tetragonopterus argenteus ). Astyanax lacustris and Hemigrammus rodwayi have their geographic ranges expanded to the Parnaiba river. ABSTRACT: The fish fauna of the lower Parnaiba river was investigated through periodic sampling. Thirty-two geo-referenced samples were performed: 11 in the main course of Parnaiba river, two in the Poti river, 14 in the Longa river, three in Igaracu river, and two in Piracuruca river. Sampling was performed during the years 2012 to 2014, using beach seine, cast net, gillnet, and hand net, resulting in 2,732 captured specimens belonging to 65 species in 24 families and 11 orders. The study demonstrated great ichthyofaunistic similarity between the lower Parnaiba and the Amazon basin. One undescribed, three endemic, and one introduced species were recorded in the area. The predominant orders were Characiformes (34 species), Siluriformes (13), and Cichliformes (7). Characidae was the family with the greatest number of species (15), followed by Cichlidae (7), and Loricariidae (6). Eight species had high abundance and represented 62.7% of captured specimens (Astyanax lacustris, Curimatella immaculata, Hemigrammus rodwayi, Hyphessobrycon sp, Jupiaba polylepis, Psellogrammus kennedyi, Serrapinnus piaba, and Tetragonopterus argenteus). Astyanax lacustris and Hemigrammus rodwayi had their known geographic ranges expanded to the Parnaiba river. We report five species from estuarine environments: Anchovia surinamensis, Anchoviella guianensis, Lycengraulis batesii, Microphis lineatus, and Awaous tajasica.