Title of article :
Organochlorine contaminants in endangered Hawaiian monk seals from four subpopulations in the Northwestern Hawaiian Islands
Author/Authors :
Gina M. Ylitalo، نويسنده , , Matthew Myers، نويسنده , , Brent S. Stewart، نويسنده , , Pamela K. Yochem، نويسنده , , Robert Braun، نويسنده , , Lizabeth Kashinsky، نويسنده , , Daryle Boyd، نويسنده , , GEORGE A. ANTONELIS، نويسنده , , Shannon Atkinson، نويسنده , , A. Alonso Aguirre، نويسنده , , Margaret M. Krahn، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
14
From page :
231
To page :
244
Abstract :
We analyzed blubber and blood samples for organochlorines (OCs) from 158 Hawaiian monk seals (Monachus schauinslandi) at four of their six primary breeding colonies in the Northwestern Hawaiian Islands. Levels of OCs in blubber were lower in adult females compared to juveniles or adult males, evidently owing to the transfer of these lipophilic compounds to pups by pregnant and lactating females. Concentrations of ∑PCBs and p,p′-DDE in blubber generally increased with age until seals were sexually mature and then continued to increase with age in males after puberty. Average levels of PCBs and PCB toxic equivalents (TEQs) in blubber were significantly higher in adult male and juvenile seals at Midway Atoll than the same age class of seals at the other colonies. Unlike concentrations of OCs in blubber, circulating levels of OCs in blood did not vary consistently among age classes of seals or among breeding colonies. Though the concentrations of OCs measured in Hawaiian monk seals were generally equal to or lower than those reported for other pinniped species in the North Pacific Ocean, they were high enough in a few seals to potentially affect their health.
Keywords :
Hawaiian monk seal , Organochlorines , Endangered species , breeding colony , PCBs
Journal title :
Marine Pollution Bulletin
Serial Year :
2008
Journal title :
Marine Pollution Bulletin
Record number :
1296279
Link To Document :
بازگشت