Levantamento e distribuição das espécies de Teredinidae (Mollusca - Bivalvia) no manguezal da Praia Dura, Ubatuba, São Paulo, Brasil

Abstract

• Abstract: A survey for bivalves (Teredinidae) at several sites in the Escuro River andComprido River at mangrove regions in Praia Dura, Ubatuba, SP was conducted. Nausitora fusticula was the most abundant species found in all collection sites at the border of Comprido River meaning that the species was well adapted to the intertidal regions and to the large variation in salinity (O to 33 S). N. fusticula was found with Bankia fimbriatula, Bankia gouldi andBankia rochi at the mangrove region in contact with the water. At the regions less influenced by the tides N. fusticula occurred with Neoteredo reynei and few specimens of the genus Bankia already cited. The species ofTeredinidae was found at the maximum limit of penetration ofthe sea water during the high tides. When the salinity was lower neither Bankia species nor Neoteredo reynei occurred, but Psiloteredo healdi and N. fusticula were found.• Resumo: Realizou-se o levantamento e estudou-se a distribuição das espécies de

The interference of methods in the collection of teredinids (Mollusca, Bivalvia) in mangrove habitats

“…These numbers of species and individuals were lower than the ones obtained throughout one year from Brazilian Southeastern estuary (LOPES & NARCHI, 1993;1997). An analysis of the methodology adopted by LEONEL et al (2002) suggests that their results were influenced by differences in the larval penetration into the wood of the mangrove trees and the period the substratum was submerged.…”

“…Collections of wood-boring species in Brazilian estuaries have been carried out through different methodologies by using (1) laminated panels of pine wood sheets (JUNQUEIRA et al, 1989), (2) branches from mangrove trees (LOPES & NARCHI, 1993;REIS, 1995), (3) the first two methods combined (MÜLLER & LANA, 1986;LEONEL et al, 2002), (4) laminated panels of pine wood and of mangrove tree sheets combined with entire blocks of wood of mangrove trees (LOPES & NARCHI, 1997), and (5) entire blocks of wood from mangrove trees (SANTOS et al, 2003).…”

“…Among possible factors interfering in these results, it can be considered differences in the time of water exposition by the wood since the penetration of teredinid larvae in the wood depends on the time of immersion and formation of biofilm on the wood (MILLER, 1926;OWEN, 1953;GARA et al, 1997;LOPES & NARCHI, 1997). Other factors also seem to interfere, as water salinity and pollution (HOAGLAND, 1986;LOPES & NARCHI, 1993), presence of fouling organisms on the wood surface (JUNQUEIRA et al, 1989), presence of wood borers (SOUTHWELL & BULTMAN, 1971;HOAGLAND, 1986;GARA et al, 1997) and wood type (SOUTHWELL & BULTMAN, 1971;REIS, 1995).…”

Ocorrência e recrutamento larval de Teredinidae (Mollusca, Bivalvia) na região do Sistema Costeiro Cananéia-Iguape, São Paulo, Brasil

“…Em regiões estuarinas, L. floridanus e B. gouldi ficaram restritas às regiões com salinidades mais elevadas (Müller & lana, 1986;lopes & narchi, 1993). No presente trabalho estas duas espécies foram encontradas somente no infralitoral, onde não ficaram sujeitas às oscilações da maré, mas também a salinidade não apresentou muita variação em relação à obtida na margem do bosque de mangue, o que pode representar a importância do tempo de submersão na distribuição dessas o demonstrou Junqueira & silva (1991).…”

“…No Brasil, as pesquisas com teredinídeos enfocaram o levantamento e a distribuição das espécies e a avaliação da infestação em substratos artificiais (Müller & lana, 1986;MarTins-silva et al, 1988;Junqueira et al, 1989Junqueira et al, , 1991Junqueira & silva, 1991;BarreTo et al, 1993;lopes & narchi, 1993) e em madeiras próprias do ambiente manguezal (lopes & narchi, 1997;leonel et al, 2002, 2006Filho et al, 2008), bem como a resistência de certas espécies de madeira à perfuração desses animais (Milano & lopez, 1977(Milano & lopez, /1978reis, 1995). Poucos têm sido os trabalhos enfocando outros aspectos, como a colonização da madeira pelas larvas a partir de um foco de infestação (varoTTo & BarreTo, 1998) e a resistência dos teredinídeos à exposição ao ar (oMena et al, 1990) e à baixa salinidade (BarreTo et al, 2000).…”