blood lead content in a peri-urban population of the south american toad bufo arenarum. | blood pb concentration in a south american toad bufo arenarum population (n = 152) was determined over 10 samplings carried out between december 1996 and november 1999. the studied population lived in the surroundings of the la plata city, the largest industrial-urban setting of the buenos aires province, argentina. the presence of the metal was detected in all the samples tested, the mean concentration range being 1.99-4.66 mg dl(-1). some preliminary environmental data on soil content of pb in ... | 2001 | 11346044 |