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Ecology
England
7
Limnology
River fisheries
7
Salmo salar
7
Water quality
Fisheries
6
Rivers
6
Salmo trutta
6
Salmon fisheries
6
Fishery surveys
5
Stocking density
5
Distribution
4
Fry
4
Lune Catchment
4
Electric fishing
3
Droughts
2
Ouse Catchment
2
Biological production
1
Distribution records
1
Environment
1
Habitat improvement
1
Migratory species
1
Population dynamics
1
Population number
1
Wyre Catchment
1
spawning
1
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