title: Effect of age on the seminal plasma and spermatozoa lead concentrations of bulls.
abstract: Blood, seminal plasma and spermatozoa lead concentrations were determined in Holstein (29 animals), Brown Swiss (14 animals) and Charoleux (11 animals) bulls aged 1-8 y. Blood concentrations were (mean +/- SD) 21.47 +/- 5.85, 18.71 +/- 6.60 and 23.27 +/- 6.75 ng Pb/ml respectively/each breed. Seminal plasma concentrations were 17.15 +/- 10.37, 13.62 +/- 10.10 and 14.03 +/- 11.31 ng Pb/ml, respectively. Spermatozoa concentrations averaged 74.93 +/- 48.10, 76.60 +/- 33.95 and 63.39 +/- 25.83 ng Pb/10(9) cells respectively. Age appeared to influence seminal plasma and spermatozoa lead levels, gradually decreasing in concentrations as the animals advanced in age.
authors.affiliation: Department of Biochemistry and Toxicology, Faculty of Veterinary Medicine Aristotelian University, Thessaloniki, Greece.
authors.forename: E
authors.initials: E
authors.lastname: Alexaki
authors.forename: F
authors.initials: F
authors.lastname: Tsafaris
authors.forename: C
authors.initials: C
authors.lastname: Samara
mesh_terms: D000367:Age Factors; D000818:Animals; D002417:Cattle; D007854:Lead / Q000032:analysis* / Q000097:blood; D008297:Male; D012661:Semen / Q000737:chemistry*; D013094:Spermatozoa / Q000737:chemistry*
chemical_list: D007854:Lead