Composição da ictiofauna durante o período de alagamento em uma mata paludosa da planície costeira do Rio Grande do Sul, Brasil

• Autor(a) principal: Quintela, Fernando Marques
• Data de Publicação: 2007
• Outros Autores: Porciuncula, Rafael Almeida, Condini, Mario Vinicius Lopes, Vieira Sobrinho, João Paes, Loebmann, Daniel
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da FURG (RI FURG)
• Texto Completo: http://repositorio.furg.br/handle/1/5742
• topic: Swamp forest; Fishes; Survey; Flooded period; Rivulidae; Mata palustre; Peixes; Inventário; Alagamento

The few remaining swamp forests fragments that occur in the coastal region of southern Brazil are poorly revised and studies on their ichthyofaunal composition are rare. In the present article we describe the fish assemblage of a swamp forest fragment in the Rio Grande county, Rio Grande do Sul state, southern Brazil. Thirty eight samples where collected with a small fish-trap (locally known as 'covo') in the flooded period between October-November 2005 and August-November 2006. A total of 18 species were sampled, representing four orders (Characiformes, Siluriformes, Cyprinodontiformes, Synbranchiformes) and seven families (Characidae, Heptapteridae, Callichthyidae, Rivulidae, Anablepidae, Poeciliidae, Synbranchidae). The family Characidae presented the larges number of species while the Cyprinodontiforms were the most abundant (86% of the total number of fish collected). Among the Cyprinodontiforms the numerical dominance of the killifishes Austrolebias minuano and Austrolebias wolterstorfii was of particular importance, specially because both are threatened species, and represented the second and third more abundant species in this fish assemblage, evidencing the relevance of the swamp forest preservation for the conservation of the remaining annual fish populations of southern Brazil and Rio Grande do Sul state.