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vol.52 número1Winter distribution, density and size of Mesodesma mactroides (Bivalvia, Mactracea) in Monte Hermoso beach (Argentina)Diatom associations in shelf waters off Paraná State, Southern Brazil: annual variation in relation to environmental factors índice de autoresíndice de assuntospesquisa de artigos
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Brazilian Journal of Oceanography

versão impressa ISSN 1679-8759versão On-line ISSN 1982-436X


VILLAS BOAS, Alexandre Bigio  e  FIGUEIREDO, Marcia A. de O.. Are anti-fouling effects in coralline algae species specific?. Braz. j. oceanogr. [online]. 2004, vol.52, n.1, pp.11-18. ISSN 1679-8759.

The crustose coralline algae are susceptible to be covered by other algae, which in turn can be affected by anti-fouling effects. In this study the hypothesis tested was that these algae can inhibit the growth of epiphytes in a species specific way. In the laboratory, propagules of Sargassum furcatum and Ulva fasciata were liberated and cultivated on pieces of coralline algae and slide covers (controls) and their survival and growth were compared. Spongites and Hydrolithon significantly inhibited the growth of U. fasciata but not Sargassum. In the field, pieces of three species of live and dead coralline algae and their copies in epoxy putty discs were fixed on the rock. After one month epiphytic algae were identified and their dry mass quantified. Lithophyllum did not affect the epiphyte growth. In contrast Spongites and an unidentified coralline significantly inhibited the growth of Enteromorpha spp., Ulva fasciata and Hincksia mitchelliae. Colpomenia sinuosa was absent on all living crusts, but present on controls. Results show that the epiphyte-host relation depends on the species that are interacting. The sloughing of superficial cells of coralline crusts points to the possible action of physical anti-fouling effect, though a chemical one is not rejected.

Palavras-chave : Anti-fouling; Crustose coralline algae; Epiphytes; Rocky shore.

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