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Effects of CFT Legumine Rotenone on Macroinvertebrates in Four Drainages of Montana and New Mexico. Joseph A. Skorupski Jr. 1 , Todd M. Koel 2 , and Carter Kruse 3 1 Division of Wildlife Resources 2 Yellowstone National Park, Fisheries and Aquatic Sciences Section 3 Turner Enterprises, Inc.
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Effects of CFT Legumine Rotenone on Macroinvertebrates in Four Drainages of Montana and New Mexico Joseph A. Skorupski Jr.1, Todd M. Koel2, and Carter Kruse3 1Division of Wildlife Resources 2Yellowstone National Park, Fisheries and Aquatic Sciences Section 3Turner Enterprises, Inc.
Outline • Introduction • Restoration • Rotenone • Project goal • Objective • Methods • Results • Conclusions
Fisheries Management • Piscicides important management tool • Native fish restoration • Contentious and criticized
Rotenone • Concerns using rotenone • Public health • Environmental impacts • Applicator safety • 2005 CFT Legumine registered • Reduced/eliminated petroleum hydrocarbons • No synergist PB • Ecologically??
Project Goal • Many conventional rotenones extensively studied • Vinson et al. 2010 • CFT Legumine lab study • Finlayson et al. 2010 What are the effects of CFT Legumine on macroinvertebrates?
Objective • Comprehensive • 4 projects • Geographic regions • Vinson et al. 2010 • Lacking powerful interpretations • Impact and recovery • Treatment design • Sampling design • Taxa toxicity differences
Treatment • Detox • Improvement??
Statistical Analysis • EPT abundance and richness • One-way ANOVA and Tukey’s MRT • Question • Treatment (rotenone) and detox (KMnO4) • pre, immediate post and 1 year post • Control vs. treatments • Community composition: EPT • Non multi-dimensional scaling • Morisita-Horn index
Specimen Creek A = pre vs. post B = pre vs. 1-yr C = sampling event vs. control Detox Cherry Creek Detox
Comanche Creek A = pre vs. post B = pre vs. 1-yr C = sampling event vs. control Treatment Costilla Creek Treatment Detox
EPT Abundance • Specimen Creek • Immediate post • Detox and Treatment(minimal) • Cherry Creek • Immediate post • Detox and Treatment(minimal) • Comanche Creek • Immediate post • Treatment • Costilla Creek • Immediate post • Treatment
Specimen Creek Cherry Creek Treatment Detox Detox Treatment Treatment Treatment Costilla Creek ComancheCreek Treatment Treatment Detox Detox
Conclusions • Treatment • Similar in geographic region • Minimal impact • Specimen and Cherry • Significantly influenced • Comanche and Costilla • Improvement? • Mangum and Madrigal 1999 • Hamilton et al. 2009 • Dosage? • Support Finlayson et al. 2010
Detox • 3 projects impacted • Exposure • Distance downstream • Environmental conditions • Recovery one year after treatment
Management Implications • Utilize CFT Legumine • Improved treatment design • Fishless areas • Partition drainage • < 8 hr. treatment • Minimal concentration • Long term studies • Extensive invertebrate sampling
Acknowledgments • Todd Koel • Mike Ruhl • Jeff Arnold • Carter Kruse • Dan McGuire, Gerald Jacobi, Kirk Patten • Charles Randklev • Ben Lundeen • Erin Skorupski