Respostas dos invertebrados a aplicação de revestimentos antiincrustantes.

Abstract

Antifouling paints are usually applied on boat hulls, ships and small vessels to prevent the growth of fouling organisms, including bacteria, algae, mussels and others invertebrates. Most of antifouling paints present biocides, which are slowly released in environment, may promote an effective protection with great duration against biofouling, e. g., Limnoperna fortunei (Dunker, 1857). This study evaluated the effects of the use of antifouling paints contains copper oxide on the invertebrate colonization (L. fortunei, Oligochaeta and Chironomidae) among different antifouling paints and over time. For this study, the artificial substrata of wood were used to determine differences between antifouling and control (plate without paint). The colonization of the invertebrate on the substrata was observed twelve months. The most abundant taxon were L. fortunei (Mytilidae), Oligochaeta (Naididae) and Chironomidae larvae. Differences in the density, richness and composition were observed between the antifouling paints and control, with larger values registered in the control. Higher values of the coefficient of community loss were observed in antifouling paints, indicating large dissimilarity with the reference assemblage (control). However, with attendance of the monthly colonization was observed a similarity invertebrate composition between antifouling paints and control. However, with the monthly attendance of the colonization was observed invertebrate s composition similarity between antifouling paints and control. The obtained results confirm the hypothesis that antifouling paints with copper oxide hinder the colonization by invertebrates, decreasing the density and richness, compounding an assemblage with a reduced number of individuals and taxa (species and morphospecies)