title: Mortality and abnormalities observed after experimental Hg exposure in the polychaete Eurythoe complanata (Pallas) from Mazatlan, Mexico.
abstract: Lethal effects of Hg on Eurythoe complanata held under laboratory conditions were evaluated (LC50 and LT50). Worms were exposed to 0-900 microg/L of Hg for 10 days. Mortality occurred in all the treatments, being faster at 200-900 microg/L, which was confirmed by a Friedman ANOVA non-parametric test. The 4-day LC50 = 197.15 microg/L (200 microg/L LT50 = 3.4 days) was similar to that reported for other Hg tolerant annelids. Abnormalities were observed in worms exposed to all the treatments, becoming more severe as Hg concentrations increased: body darkening, rough, white and opaque skin, everted and swollen proboscis and gut evisceration.
authors: Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Joel Montes Camarena s/n, Mazatlán, Sinaloa, Mexico. nuri@ola.icmyl.unam.mx
authors: Nuria
authors: N
authors: Méndez
authors: Carlos
authors: C
authors: Green-Ruíz
authors: Ramón
authors: R
authors: Vázquez-Núñez
mesh_terms: D000818:Animals; D004064:Digestive System / Q000187:drug effects / Q000473:pathology; D007928:Lethal Dose 50; D008628:Mercury / Q000633:toxicity*; D008800:Mexico; D011077:Polychaeta / Q000187:drug effects*; D012867:Skin / Q000187:drug effects / Q000473:pathology; D014873:Water Pollutants / Q000633:toxicity*
chemical_list: D014873:Water Pollutants; D008628:Mercury