A endofauna da esponja zygomycale parishii (Bowerbank) composição, dominancia, diversidade e natureza da associação

AUTOR(ES)
DATA DE PUBLICAÇÃO

1980

RESUMO

The endobiotic fauna of the sponge Zygomycale parishii (Bowerbank) was studied during a two and a half year sampling program at two sites, Lamberto and Araçá, on the north-east coast of the State of São Paulo. A total of 92 species with length of more than 1 mm were identified for the fauna. The following taxonomic groups were represented: Cnidaria, Turbellaria, Nemertinea, Sipuncula, Poluchaeta, Mollusca, Crustacea, Pycnogonida, Echinodermata, Ascidiacea and Pisces. The results obtained on the number of species (species richness), the abundances of different species, and faunal composition were related to the physico-biotic characteristics of the study sites. The influence of sample volume and other methodological artifacts on sample characteristics were also examined. The endobiotic fauna showed clear differences in species richness, individual abundance, and faunal abundance between the two sites. The ophiuroid Ophiactis savignyi (Mull &trosch.) was the dominant endobiotic species, comprising 64% of all individual collected. The two collecting sites differed greatly in species diversity, with the Araçá samples being much more diversified. The higher diversity in São Sebastião may be due to scarcity of alternative shelters for this fauna, to highe larval recruitment and to the closeness of Z. parishii to its substrate. Under laboratory conditions, Z. parishii releases one or more toxic substances which, when concentrated, kill the endofauna... Note: The complete abstract is available with the full electronic digital thesis or dissertations.

ASSUNTO(S)

esponja ecossistema

ACESSO AO ARTIGO

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