Primeiro registro e aspectos ecológicos de Hoplerythrinus unitaeniatus (Agassiz, 1829) (Characiformes, Erythrinidae) como espécie introduzida na Bacia do Rio dos Sinos, RS, Brasil

Biota Neotropica

Mateus Evangelista Leal¹  Greice Francisco Klein¹  Uwe Horst Schulz¹  Pablo Lehmann Albornoz¹ 

[1] ,Universidade do Vale do Rio dos Sinos Laboratório de Ecologia de Peixes São Leopoldo RS ,Brasil

关键词: Erythrinidae;    Hoplerythrinus unitaeniatus;    invasive species;    Erythrinidae;    Hoplerythrinus unitaeniatus;    espécies invasoras;   

DOI  :  10.1590/S1676-06032010000300002

来源: SciELO

【 摘 要 】

Hoplerythrinus unitaeniatus is popularly known as jeju or aimara. Widely distributed, occurs in many Central and South America basins, with the São Francisco River as type locality. In Brazil, the southernmost record of the species is the Uruguay River, Rio Grande do Sul State. This study reports the first record of H. unitaeniatus in the Patos Lagoon system, Guaiba hydrographic region, state of Rio Grande do Sul, Brazil. The capture occurred in a floodplain adjacent of the Sinos River near São Leopoldo city (29° 44' 14.04" S and 51° 05' 11.08" W). Two specimens were collected with drag net in May 2008. One specimen was anesthetized with 2-phenoxy-ethanol solution, fixed in formalin 10%, identified and included in the Museu de Ciências e Tecnologia da Pontífícia Universidade Católica do Rio Grande do Sul fish collection. The second specimen was kept alive in aquarium. After ten months it died of Lernaea cyprinacea (Crustacea, Copepoda) infestation. The presence of Lernaea and ease of captive breading of this species support the hypothesis that the collected fish escaped from regional fish farms. The accidental capture does not necessarily reflect a self-sustaining population, but shows the absence of supervision on breeding and marketing of non-native species, which may lead to a homogenized aquatic community.

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