SciELO - Scientific Electronic Library Online

 
vol.82 número3El género Lepidaploa (Familia Asteraceae, Tribu Vernonieae) en MéxicoEl complejo de especies Lachesilla asperiforceps del grupo de especies L. forcepeta (Psocodea: 'Psocoptera': Lachesillidae) índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista mexicana de biodiversidad

versión impresa ISSN 1870-3453

Resumen

HENDRICKX, Michel E.; MAH, Christopher  y  ZARATE-MONTES, Carlo Magno. Deep-water Asteroidea (Echinodermata) collected during the TALUD cruises in the Gulf of California, Mexico. Rev. Mex. Biodiv. [online]. 2011, vol.82, n.3, pp. 798-824. ISSN 1870-3453.

During a series of cruises aboard the R/V "El Puma" aimed at collecting the deep-water benthic and pelagic fauna off the Pacific coast of Mexico, in the eastern Pacific, samples of Asteroidea were collected below 500 m depth (587-1 526 m). A total of 335 specimens were collected, belonging to 18 species, 14 identified to species, 3 to genus, and 1 previously undescribed species. New records are provided for Dipsacaster laetmophilus Fisher, 1910, Myxoderma sacculatum (Fisher, 1905), Peribolaster biserialis Fisher, 1905, Ampheraster chiroplus Fisher, 1928, Ampheraster hyperoncus (H. L. Clark, 1913), Anteliaster coscinactis Fisher, 1923, Nearchaster aciculosus (Fisher, 1910), Ceramaster leptoceramus (Fisher, 1905), Mediaster transfuga Ludwig, 1905, and Lophaster furcilliger Fisher, 1905. All species were collected below the oxygen minimum zone that extends throughout the central and southern Gulf of California, or within the threshold zone where severe to mild hypoxic conditions prevail. Epibenthic dissolved oxygen concentrations associated with the capture of the specimens show support for strong tolerance to severe hypoxia (<1.0 ml O2/l) for most species, but only mild hypoxia for Ctenodiscus crispatus (Retzius, 1805), and Nymphaster diomedeae Ludwig, 1905. A checklist of all species of Asteroidea occurring below 500 m depth off the Pacific coast of Mexico is included.

Palabras llave : Asteroidea; continental slope; western Mexico.

        · resumen en Español     · texto en Inglés     · pdf en Inglés