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Use of Antimycin for Removal of Brook Trout from a Tributary of Yellowstone Lake
Author(s) -
Gresswell Robert E.
Publication year - 1991
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1991)011<0083:uoafro>2.3.co;2
Subject(s) - tributary , trout , fishery , environmental science , ecology , geography , biology , fish <actinopterygii> , cartography
A major spawning migration of native Yellowstone cutthroat trout Oncorhynchus clarki bouvieri occurs in Arnica Creek, a tributary of Yellowstone Lake. An introduced population of brook trout Salvelinus fontinalis was detected in Arnica Creek in May 1985. Subsequent electrofishing surveys of 40 additional tributaries of Yellowstone Lake revealed that brook trout were restricted to Arnica Creek. Because of undesirable ecological consequences to Yellowstone Lake, the U.S. National Park Service decided to eradicate the brook trout population. The Arnica Creek drainage, including a 23.6‐hectare lagoon, was treated with antimycin in August 1985. A second application in August 1986 was limited to the stream. Posttreatment surveys in 1987, 1988, and 1989 indicated that brook trout were eliminated, and spawning migrations of cutthroat from Yellowstone Lake have remained viable. Application techniques and accurate estimates of toxin dispersal within the stream appeared to be the most critical variables affecting treatment success.