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big game fishing
2
blue economy
2
economic contribution
2
marine recreational fisheries
2
travel cost method (TCM)
Biological Oceanography
1
Chemical Oceanography
1
General. Including nature conservation
1
Marine Biology
1
Marine Engineering
1
Marine Geoscience
1
Oceanography
1
Physical Oceanography
1
Q
1
QH1-199.5
1
Science
1
geographical distribution
1
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