IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
artículos
Título:
Planktonic cnidarian biodiversity of San Matías Gulf and adjacent areas; Patagonia, Argentina.
Autor/es:
GUERRERO E.; GILI J. M.; RODRIGUEZ C.; CAVET A.; GENZANO G. N.; MIANZAN H.; GONZALEZ R.
Revista:
MARINE ECOLOGY PROGRESS SERIES
Editorial:
INTER-RESEARCH
Referencias:
Lugar: Oldendorf/Luhe; Año: 2013 vol. 34 p. 71 - 82
ISSN:
0171-8630
Resumen:
The special location (40–42°S in the Southwestern Atlantic Ocean) and thehydrodynamic regime (limited water exchange with open ocean) in San Matı´asGulf (Argentina) seem to produce a particular fauna of planktonic cnidarianswhose their abundances are mainly shaped by the Gulf circulation. Four oceanographiccruises, covering 93 stations in three different seasons during 2007and 2008 were carried out to quantify species richness and abundance, as well as to analyse the distribution of these cnidarians. We identified 20 species of hydromedusae and one siphonophore, increasing the total number of hydromedusae for the area to 23. This value is similar to the one found in the abutting Argentine continental shelf (20), but with a different assemblagecomposition. Hydromedusae abundances found were low, except for a bloom of the Leptomedusa Obelia spp. during the cold season. The only siphonophore found in the area, Pyrostephos vanhoeffeni, has previously been thought to be endemic to Antarctic and sub-Antarctic waters, this being the first record for temperate waters of the Southwest Atlantic Ocean.