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

Abstract

ABSTRACT. The occurrence and larval recruitment of Teredinidae (Mollusca, Bivalvia) in Cananeia-Iguape Coastal System, São Paulo, Brazil. The occurrence and larval settlement of Teredinidae in Cananéia-Iguape Coastal System were observed for one year, by using laminated pinewood panels installed in three stations inside the mangrove forest (intertidal zone) and in one station, in the infralittoral. In the mangrove forest, the larval colonization occurred after four months in the most frequently flooded station and after eight months in the two less frequent flooded stations. In the infralittoral, the panels were highly infested after four months. Along the experiment, the number of individuals decreased, especially in the infralittoral, possibly due to competition between teredinids and pholadids for wood. Bankia fimbriatula was the most abundant teredinid, occurring in the infralittoral and in the mangrove area, followed by Bankia gouldi and Lyrodus floridanus, which occurred only in the infralittoral and Nausitora fusticula which was found only in the mangrove forest. In total, 704 individuals of Teredinidae were collected. Martesia striata, the single pholadid, was found in the infralittoral, and totaled 2,658 individuals. KEYWORDS.Intertidal zone, infralittoral, mangrove forest, teredinids, pholadid. RESUMO.A ocorrência e o recrutamento larval de Teredinidae na região do Sistema Costeiro Cananéia-Iguape foram acompanhados por doze meses utilizando-se coletores laminados de pinho, instalados em três estações dentro do bosque de mangue (mediolitoral) e em uma estação, localizada no infralitoral. No manguezal, a colonização por larvas de teredinídeos ocorreu após quatro meses de permanência dos coletores na estação mais frequentemente inundada pela maré e somente após oito meses nas duas estações com menor frequência de inundação. No infralitoral, após quatro meses, os coletores já estavam consideravelmente danificados. Ao longo do experimento, houve um decréscimo no número de teredinídeos, especialmente no infralitoral, ocasionado possivelmente pela competição por alimento e espaço entre teredinídeos e foladídeos. Foram encontrados 2.658 indivíduos, sendo 704 de Teredinidae e 1.954 de Pholadidae. Entre os teredinídeos, Bankia fimbriatula foi a espécie mais abundante tanto no infralitoral quanto no manguezal, seguida de Bankia gouldi e Lyrodus floridanus que ocorreram somente no infralitoral, e Nausitora fusticula encontrada somente no manguezal. Martesia striata, único foladídeo, ocorreu somente no infralitoral.

Evaluation of wood degradation rates by Teredinidae (Mollusca: Bivalvia) in two ecologically distinct areas, and temperature and salinity influences on the cellulolytic activity of associated bacteria

“…According to Lum (1981), L. tripunctata could survive in a wide range of temperature (2 up to 35°C) and salinity (19 to 50 ppt) under laboratory conditions, but reproduction only occurs between 15 -30°C and 20 -40 ppt salinity. The dominant species (L. floridanus and B. gouldi) are regularly described as the main species along the southwest Brazilian coast in the outer regions of estuaries or in coastal waters (Maldonado & Skinner 2016, Moraes et al 2015, Junqueira et al 1989. A similar pattern has been recorded, for example, in Europe (Roch 1932, Beckman & Menzies 1960, Eltringham 1961, Kristensen 1969, Eckelbarger & Reish 1972, Borges 2014, Borges et al 2014.…”

Spatial and seasonal variation of zooplankton assemblages in two tidal control structures in Northeastern Brazil

“…Salinity influences bivalve mollusks, mainly in the larval stage, when it interferes with their physiological process, determining feeding capacity and survival, as well as the ability to select fixation sites (Moraes et al, 2015). Meanwhile, it can affect reproduction in adulthood since they suffer stress with variations of salinities, which cause organisms to have partial or total spawning.…”

Endoglucanase activity in Neoteredo reynei (Bivalvia, Teredinidae) digestive organs and its content

“…The mangrove water temperature depends on several factors, and a range of 17-25 °C has been reported for a mangrove in some countries (Moraes et al 2015). The difference on the temperature effects on the endoglucanase activity may suggest that this enzyme could be from a different microorganism, or from a different symbiotic system.…”