[MARMAM] papers on DDT in Galapagos sea lions

Juan Alava jj_alava at yahoo.com
Tue Aug 16 14:35:23 PDT 2011

Dear colleagues,

I hope everybody is doing well. Two new contributions on DDT in Galapagos sea lions were recently published. Please, see below
DDT in endangered Galapagos sea lions (Zalophus wollebaeki)
Marine Pollution Bulletin, Volume 62, Issue 4, April 2011, Pages 660-671
We characterize for the first time the presence of DDT and its metabolites in tropical Galapagos sea lions
from 16 to 3070 lg/kg lipid. Concentrations of ∑DDT in pups in 2008 averaged 525 lg/kg lipid and were
1.9 times higher than that (281 lg/kg lipid) detected in pups in 2005. These concentrations are lowerp,p'-DDE toxic effect concentration associated with anti-androgenic effects reported in
than those reported in many pinnipeds elsewhere, comparable to those in Hawaiian monk seals, and
higher than those in southern elephant seals. The health risk characterization showed that 1% of the male
pups exceeded the 
rats. The findings provide preliminary guidance on the relationship between DDT use and ecological
impacts, serving as a reference point against which possible future impact of tropical DDT use can be
DDT Strikes Back: Galapagos Sea Lions Face Increasing Health RisksAMBIO: A Journal of the Human Environment, 40(4):425-430. 2011.
Published By: Royal Swedish Academy of SciencesAMBIO: A Journal of the Human Environment, 40(4):425-430. 2011.
If you would like an electronic pdf copy, please feel free to contact me (jalavasa at sfu.ca)

The articles are also available at:




Juan Jose AlavaZalophus wolleabeki).PDDT concentrations in Galapagos sea lion pups sampled in 2005 and 2008 ranged
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