Abundance of the reef-building Petaloconchus varians (Gastropoda: Vermetidae) on intertidal rocky shores at Ilha Grande Bay, southeastern Brazil
Título del documento: Abundance of the reef-building Petaloconchus varians (Gastropoda: Vermetidae) on intertidal rocky shores at Ilha Grande Bay, southeastern Brazil
Revista: Anais da Academia Brasileira de Ciencias
Base de datos: PERIÓDICA
Número de sistema: 000408955
ISSN: 0001-3765
Autores: 1
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1
1
Instituciones: 1Universidade Federal do Rio de Janeiro, Centro de Ciencias da Saude, Rio de Janeiro. Brasil
Año:
Periodo: Jun
Volumen: 89
Número: 2
Paginación: 907-918
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés The reef-building vermetid Petaloconchus varians occurs in the western Atlantic Ocean, from the Caribbean Sea to the southern coast of Brazil. The present study evaluated the abundance of P. varians on intertidal rocky shores in Ilha Grande Bay (Rio de Janeiro State), and characterized their reefs, describing the species density, besides the weight and the belt width of the reefs. Petaloconchus varians reefs were recorded at 25 sites, with rocky shores exposed to different wave action (very sheltered, sheltered, semi-exposed and exposed) and slopes (10° to 46°). Clusters of individuals constructed large reefs along the middle intertidal zone, creating a wide belt (38 cm to 2 m). The density of P. varians and the weight of the reefs ranged from 620 to 2,559 ind.100 cm-2 and from 100 to 1,500 g.100 cm-2, respectively. Considering that the species was last reported from the area in the mid-20th century, the present study suggests that P. varians reefs are becoming dominant in the intertidal zone of rocky shores in Ilha Grande Bay. This is a contribution to knowledge of this ecosystem in Ilha Grande Bay, in view of local or global ecological changes
Disciplinas: Biología
Palabras clave: Ecología,
Moluscos,
Moluscos marinos,
Abundancia,
Densidad poblacional,
Arrecifes de coral,
Petaloconchus varians,
Gastropoda
Keyword: Biology,
Ecology,
Molluscs,
Marine molluscs,
Abundance,
Population density,
Coral reefs,
Petaloconchus varians,
Gastropoda
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