IBIOMAR - CENPAT   25620
INSTITUTO DE BIOLOGIA DE ORGANISMOS MARINOS
Unidad Ejecutora - UE
artículos
Título:
Echinoderms in San Matías Gulf, Southwestern Atlantic Ocean
Autor/es:
BROGGER, M. I.; ARRIBAS L.P.; MARTINEZ, M. I.
Revista:
THALASSAS (SANTIAGO DE COMPOSTELA)
Editorial:
UNIV VIGO
Referencias:
Lugar: Vigo; Año: 2016 vol. 32 p. 11 - 18
ISSN:
0212-5919
Resumen:
Echinoderms are often of ecological importance in intertidal and subtidal waters, especially as predators and herbivores but also as prey. Several groups of echinoderms respond in a different way to environmental variables, contributing to some of the biodiversity patterns found along latitudinal gradient. This work listed the echinoderms species of San Matías Gulf surrounding the coast of Río Negro Province, and analyzed the current state of knowledge of this group by previous works, collection items of the Museo Argentino de Ciencias Naturales ?Bernardino Rivadavia? and from samples taken since 2009 to the present. A total of 35 species of echinoderms corresponding to four classes were recorded. The 34.29% corresponds to Asteroidea, 31.43% to Ophiuroidea, 20% to Echinoidea and 14.28% to Holothuroidea. Crinoidea has not been reported for San Matías Gulf. Asteroidea and Ophiuroidea were the most representative groups follow by Echinoidea and Holothuroidea, with only five species in the last class. About 30% of country?s species are present in Río Negro Province. This high number of species may be due to the heterogeneity of environments that are possible to find in San Matías Gulf and a transition zones between the Magellanic and Argentine biogeographic provinces that can provide particular physical and climatic characteristics explaining as consequence the faunal composition.