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Dissolved oxygen concentration and emergence of sea trout fry from natural redds in tributaries of the River Rhine
Author(s) -
Ingendahl D.
Publication year - 2001
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2001.tb02256.x
Subject(s) - tributary , salmo , fishery , trout , brown trout , biology , salmonidae , ecology , fish <actinopterygii> , geography , cartography
A total of 4289 sea trout Salmo trutta alevins swam up from six of eleven covered redds. They emerged only from those redds where the mean dissolved oxygen level was >6·9 mg l −1 and the Sorting coe.cient, an indicator of intragravel void space, was <5. These results are discussed in relation to field studies using artificially buried salmonid eggs but also in relation to the ongoing programme for the reintroduction of Atlantic salmon in tributaries of the River Rhine.