Assessment of a rotenone application event at Mormon Island West lake in Central Nebraska
نویسندگان
چکیده
1 Introduction Fisheries managers have used rotenone for over 100 years (Solman 1950, Kiser et al. 1963). The product rote-none is derived from the natural toxic properties from the roots of several different derris plant species that are located in tropical regions (Ling 2002). The toxins work by blocking mitochondrial electron transport at the cellular level (Singer and Ramsay 1994). These properties have been useful to fishery professionals for: control of undesirable fish; eradication of harmful exotic fish; target treatment of nuisance fish species; quantification of populations; assessment of sampling methodologies; elimination of competing species in aquaculture ponds; treatment of drainages prior to impoundment; eradica-tion of fish to control disease; restoration of threatened or endangered species; and assessment of specific habitat treatments (McClay 2000, Ling 2002). Rotenone use was widespread in the early 1990s as 77% of states and 62% of federal and state agencies reported use (McClay 2000). The most prevalent use for rotenone applications in lentic waters was reported as maintenance of sport fisheries (McClay 2000). The essence of this use was to re-set fish communities that were not balanced or dominated by non-desirable species. Subsequent to this time, the use of a piscicide and concerns of potential impacts to non-target components of the aquatic community were questioned and many entities have limited the use of rotenone. The Nebraska Game and Parks Commission (NGPC) periodically apply rotenone to renovate communities composed of non-desirable fish species. Nu
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