 |
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| amerikansk helt (Coregonus artedi, Coregonus artedii, Leucichthys artedii); almindelig døbel (Leuciscus cephalus, Squalius cephalus); døbel (Leuciscus cephalus, Squalius cephalus) | |||
| Chub: 5 phrases in 2 subjects |
| Fish farming pisciculture | 4 |
| Natural resourses and wildlife conservation | 1 |