| helminths of two native frog species (rana chiricahuensis, rana yavapaiensis) and one introduced frog species (rana catesbeiana) (ranidae) from arizona. | the gastrointestinal tracts, lungs, urinary bladders, and body cavities of rana catesbeiana (n = 25), rana chiricahuensis (n = 25), and rana yavapaiensis (n = 37) from arizona were examined for helminths. helminths representing 9 species of trematodes: cephalogonimus brevicirrus, glypthelmins quieta, gorgoderina attenuata, haematoloechus complexus, haematoloechus langiplexus, megalodiscus temperatus, alaria sp., clinostomum sp., and an unidentified strigeid; and 4 species of nematodes: falcaustr ... | 1998 | 9488361 |
| methylmercury in biota downstream of arivaca lake, arizona, usa. | concentrations of total mercury (hg) and methylmercury (mehg) were determined in water, sediment, periphyton, spiders, and amphibians from the streams and desert marsh downstream from arivaca lake, arizona, to better understand their distribution and bioaccumulation. mean concentrations of mehg in water ranged from 0.09 to 0.93 ng/l, and mean concentrations of total hg in sediment ranged from 10.4 to 126 μg/kg. hg and mehg in water and sediments downstream from arivaca lake were low enough that ... | 2014 | 24468966 |