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The Kraich (German)
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    trial Station1 Station2 Station3
1. Perla Marginata 4 2 -
2. Ecdyonurus spec. - - -
3. Hydropsyche spec. 4 4 -
4. Anabolia nervosa 11 5 -
5. Bactis fuscatus 41 - ~ 30
6. Gammarus pulex 91 10 ~ 50
7. Helobdella stagnalis 1 1 -
8. Asellus aquaticus 25 - ~ 25
9. Erpobdella       octoculata     3 2 -
10. Chironomus     thummi 3 3 -
11. Tubifex spp. - - -
12. Water mite ~ 20 - -
13. Beatle  2 - ~ 10
14. Spider 3 -
15.  worm 2 8 -
16. brook flea cancer 12 1 -
17. level larva 4 - -
18. Slater - - ~20
 

by Lisa Scherer, 8a

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