Prevention and Control of Aquatic Invasive Species

The introductions and spread of invasive species are perhaps the least reversible human-induced global changes underway.  To address this threat, chemical toxicant methods should be developed to control invasive species.

Initially, this research will identify effective rotenone and antimycin concentrations that can be used to kill Asian carps under varying temperature regimens.  This research will provide managers with information to make sound decisions on chemical reclamation strategies to control Asian carps.  Ultimately, this program will provide information that will contribute to the development of programs for the integrated management aquatic invasive species.

The results of the antimycin and rotenone toxicity studies indicate treatment regimens for Asian carp removal should be based on contact (exposures for specific time periods) toxicity tests and not acute (continual exposures to 96 hours) toxicity tests.  Both toxicants are toxic to Asian carps at recommended label concentrations. Neither toxicant would be selective for Asian carps.

We will conduct antimycin and rotenone toxicity studies at different water qualities that would approximate the various types of water found in the USA.  Also, we will conduct antimycin and rotenone toxicity studies on other aquatic invasive species.  Future research will also focus on investigations into the biology of aquatic invasive species with the aim of identifying life stages susceptible to biological, physical, and chemical control

	Contact: Jeff Rach Research Fishery Biologist UMESC 2630 Fanta Reed RD La Crosse, Wi (608) 781-6322 jrach@usgs.gov Website: http://www.umesc.usgs.gov/reports_publications/fact_sheets/invasives_strategy.html