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Effects of Rotenone Treatment on Lotic Invertebrates
Author(s) -
Kjærstad Gaute,
Arnekleiv Jo Vegar
Publication year - 2011
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/iroh.201111261
Subject(s) - rotenone , biology , instar , invertebrate , larva , zoology , river ecosystem , ecology , ecosystem , mitochondrion , microbiology and biotechnology
Two rivers in Norway were treated with rotenone in an effort to eradicate the salmon parasite, Gyrodactylus salaris . Rotenone induced an immediate catastrophic invertebrate drift, mainly of dead individuals. The response to rotenone with respect to degree and timing varied widely. Baetis rhodani , Isoperla sp. and Rhyacophila nubila displayed a strong increase in drift densities early in the treatment. Baetis niger , Ameletus inopinatus , Heptagenia sp. and Agapetus ochripes showed a delayed response. Ephemerella aurivillii , E. mucronata , Taeniopteryx nebulosa and Elmis aenea drifted at low densities throughout the treatment. Early larval instar tended to be more sensitive to rotenone than later instar, and the toxic effect of rotenone tended to increase with increasing water temperature. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)