title: Interelement relationships and age-related variation of trace element concentrations in liver of striped dolphins (Stenella coeruleoalba) from Japanese coastal waters.
abstract: Concentrations of 19 trace elements (V, Cr, Mn, Fe, Co, Cu, Zn, Se, Rb, Sr, Mo, Ag, Cd, Sb, Cs, Ba, Tl, Hg, and Pb) were determined in the liver of the striped dolphins (Stenella coeruleoalba) collected around Japan during 1977-1982 to examine the sex difference, age dependence, and interrelationships among trace elements. Tissue distribution of trace elements was also investigated in one adult and one fetus specimens. Generally, concentrations of Se, Sr, Ag, Cd, Cs, Ba, Hg, and Pb were higher in the tissues of adult than those of fetus, whereas the opposite trend was observed for Cr and Tl. There were no significant sex differences in the trace element levels in the liver. Significant positive correlations between age (0-26.5 years) and hepatic concentrations were found for Ag, Se, Hg, V, Fe, Pb, and Sr, suggesting their age-dependent accumulation in the liver. In contrast, hepatic concentrations of Mn and Zn decreased with age. Significant positive relationships were observed between Se, and Hg, Ag, V, Fe, and Sr in the liver.
authors.affiliation: Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan.
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Agusa
authors.forename: Kumiko
authors.initials: K
authors.lastname: Nomura
authors.forename: Takashi
authors.initials: T
authors.lastname: Kunito
authors.forename: Yasumi
authors.initials: Y
authors.lastname: Anan
authors.forename: Hisato
authors.initials: H
authors.lastname: Iwata
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Miyazaki
authors.forename: Ryo
authors.initials: R
authors.lastname: Tatsukawa
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Tanabe
mesh_terms: D000367:Age Factors; D000818:Animals; D005260:Female; D005333:Fetus / Q000737:chemistry; D005843:Geography; D007564:Japan; D008099:Liver / Q000737:chemistry*; D008297:Male; D010140:Pacific Ocean; D050706:Stenella / Q000378:metabolism*; D014018:Tissue Distribution; D014131:Trace Elements / Q000378:metabolism*
chemical_list: D014131:Trace Elements