Levantamento de Mollusca, Crustacea e Echinodermata associados a Sargassum spp. na Ilha da Queimada Pequena, Estação Ecológica dos Tupiniquins, litoral sul do Estado de São Paulo, Brasil

Abstract

This work represents the first effort to assess the phytal macrofauna of Queimada Pequena island and was focused in mollusks, crustaceans and echinoderms associated to Sargassum spp. Sampling of the macrofauna was performed by random collections of 6 Sargassum fronds 6 m deep using SCUBA. The fronds were sealed underwater in individual 200 μm mesh bags and detached from the rocky shore. The samples were preserved in recipients in 10% formalin and carried to the laboratory to remove and identify the associated fauna. Forty one taxa were registered, with dominance of peracarid crustaceans. Mollusk composition is different from that of northern São Paulo coast. From the sixteen mollusk species recorded, only the gastropod genera Anachis and Odostomia and the bivalves Musculus and Modiolus were recorded in the Sargassum macrofauna at both coastal regions of São Paulo state, although the genus Fissurela had already been recorded at Santos region associated with the alga Amphiroa fragilissima. The occurrence of the exotic bivalve Isognomon bicolor was also confirmed. Our data suggest differences in the composition of molluskan fauna between southern and northern coasts of the state. Extensive investigations are necessary to confirm these results and to support management strategies in this conservation unit.

Gastropoda (Mollusca) associated to Sargassum sp. beds in São Sebastião Channel - São Paulo, Brazil

“…Similar records had already been found for phytal assemblages of other algae species and from other localities (Montouchet 1979, Schézy & Paula 2000, Chemello & Milazzo 2002, Jacobucci & Leite 2002, Jacobucci et al 2006, Almeida 2007, Leite et al 2009, Veras 2011. Many families identified in this work, including the most abundant ones (Cerithiidae, Phasianellidae and Columbellidae) have recurrent records in general phytal studies already developed in Brazil (Montouchet 1979, Jacobucci et al 2006, Almeida 2007, Leite et al 2009, Veras 2011.…”

“…predation, competition, recruitment and migration) and abiotic factors (e.g. hydrodynamism, nutrients availability, habitat structure, light incidence and temperature) (Chemello & Milazzo 2002, Jacobucci & Leite 2002, Leite et al 2009). In these communities, algae provide several advantages for invertebrate and vertebrate animals inhabiting their fronds, including protection against desiccation, wave action and predators, better temperature and salinity conditions, as well as food resources (Jacobucci & Leite 2002, Jacobucci et al 2006, Leite et al 2009).…”

“…hydrodynamism, nutrients availability, habitat structure, light incidence and temperature) (Chemello & Milazzo 2002, Jacobucci & Leite 2002, Leite et al 2009). In these communities, algae provide several advantages for invertebrate and vertebrate animals inhabiting their fronds, including protection against desiccation, wave action and predators, better temperature and salinity conditions, as well as food resources (Jacobucci & Leite 2002, Jacobucci et al 2006, Leite et al 2009). Among macroalgae groups composing the phytal, those of Sargassum can be considered one of the most representative in some localities of the Brazilian coast (Széchy & Paula 2000), with the malacofauna standing out both in abundance and diversity (Montouchet 1979, Schézy & Paula 2000, Chemello & Milazzo 2002, Jacobucci & Leite 2002, Leite et al 2009, Veras 2011.…”

“…Studies highlighting and describing the diversity of phytal molluscan assemblages are scarce in Brazil, especially in the coast of Sã o Paulo state, some of which are Montouchet (1979), Jacobucci et al (2006) and Leite et al (2009). Furthermore, illustrated inventories are practically absent in the literature, this kind of work being an important tool to the development of future studies of the phytal gastropod assemblages, as it can facilitate the species identification.…”

Characterization of macrofauna associated with articulated calcareous algae (Corallinaceae, rhodophyta) occurring in a hydrodynamic gradient on the espírito santo state coast, brazil

“…The physicochemical properties of water strongly influence coastal communities in different marine systems (JACOBUCCI et al, 2006). In this study, the sites sampled showed no great differences in water temperature and dissolved oxygen.…”