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DDT
3
POPs
3
Ross seal
3
Weddell seal
3
crabeater seal
3
killer whale
3
Biological Oceanography
2
Chemical Oceanography
2
Marine Biology
2
Marine Engineering
2
Marine Geoscience
2
Oceanography
2
Physical Oceanography
2
gene transcription
2
trophic magnification
2
General. Including nature conservation
1
Q
1
QH1-199.5
1
Science
1
geographical distribution
1
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