Περιοχή: |
Έτος: from - to |
Φύλο: | Εργαλείο: | Τύπος συχνότητας: | |||
Bell Common, Epping Forest Pond, UK | 1989 - 1989 | unsexed/mixed | other | absolute number measured | |||
Lake Frongoch, UK Engld Wal | 1977 - 1978 | unsexed/mixed | seines | absolute number measured | |||
River Weaver, UK Engld Wal | 1981 - 1982 | unsexed/mixed | seines | absolute number measured |