Eumetopias jubatus

When compared to other cetaceans, PCB residues in blubber of harbor porpoises (Phocoena phocoena) from the Black Sea showed a measurable sexual difference. PCB concentrations were lower in older female porpoises possibly due to lactational transfer to their calves, while in males the PCB concentrations were positively correlated with increasing age (Tanabe et al. 1997). In stellar sea lions (Eumetopias jubatus), the transfer rate of PCBs through lactation was estimated at 80% of the total body PCB burden of adult females (Lee et al. 1996). PCB concentrations in liver of the stellar sea lion from the Bering Sea increased with increasing age and correlated positively with those of blubber (Lee et al. 1996). In ringed seals (Phoca hispida) from the Russian Arctic, lactational transfer of PCBs was estimated at 25% of whole-body burden in the mature female (Nakata et al. 1998), or about one third that of stellar sea lions. In grey seals (Halichoerus... 

Lee, J.S., S. Tanabe, H. Umino, R. Tatsukawa, T.R. Loughlin, and D.C. Calkins. 1996. Persistent organochlo-rines in stellar sea lion (Eumetopias jubatus) from the bulk of Alaska and the Bering Sea, 1976-1981. Mar. Pollut. Bull. 32 535-544. 

Stellar sea lion, Eumetopias jubatus Alaska and Russian portion of Bering Sea blubber 1976-81 males vs. females... 

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