Abstract
Occurrence of limnic molluscs and crustaceous on clusters of the golden mussel Limnoperna fortunei (Dunker, 1857), formed on “sarandi” at Guaiba Lake (RS, Brazil). In order to verify the occurrence of invetebrates associated with macro clusters of Limnoperna fortunei (Dunker, 1857) formed on branches of “sarandi” (Chephalanthus glabratus (Spreng.) K. Schum), quantitative samplings (N=28) were conducted for two years (2002 to 2004) at Veludo Beach on Guaiba Lake (municipality of Porto Alegre, RS, Brazil). From
Highlights
Occurrence of limnic molluscs and crustaceous on clusters of the golden mussel Limnoperna fortunei (Dunker, 1857), formed on “sarandi” at Guaíba Lake (RS, Brazil)
A presença dos macroaglomerados altera os microhabitats e a estrutura da fauna bentônica (Darrigran et al, 1998)
Estes dois gastrópodes ocorreram respectivamente de forma acessória e acidental o que pode ser atribuída à competição por espaço com a espécie invasora que modificou a superfície do substrato (galhos de sarandi)
Summary
Occurrence of limnic molluscs and crustaceous on clusters of the golden mussel Limnoperna fortunei (Dunker, 1857), formed on “sarandi” at Guaíba Lake (RS, Brazil). Limnoperna fortunei (Dunker, 1857) produz fios de bisso que permitem a incrustação e a formação de macroaglomerados sobre substratos duros como rochas e galhos. Os táxons foram identificados e categorizados por meio da freqüência total de ocorrência (%) de acordo com Dajoz (1973): acidental (50%).
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