Insects for Fly Fishing

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Presentation transcript:

Insects for Fly Fishing Clemson University 17 March 2018 Workshop Leader: Dr. John C. Morse jmorse@clemson.edu 864-656-5049 Assistants: Dr. Mike Ferro Maddie Genco Kelly Murray Suellen Pometto Coleson Wrege

Plan for the day 9:00 -- General overview of stream ecology and insect morphology 9:30 -- Introduction to Insect Orders and Ephemeroptera 10:00 -- Microscope work with adult and larval mayflies 11:45 -- Preliminary report on research work in the Davidson River 12:00 -- Lunch 1:00 -- Introduction to Plecoptera 1:20 -- Microscope work with adult and larval stoneflies 2:20 -- Introduction to selected aquatic Diptera 2:40 -- Introduction to Trichoptera 3:15 -- Microscope work with adult and larval caddisflies 5:00 -- Conclusion

H.B.N. Hynes, 1970, THE ECOLOGY OF RUNNING WATERS, Chapter 9, “Factors Controlling Benthic Invertebrates” Most important: 1. Current speed 2. Temperature (including effects of altitude, season, and source) 3. Substrate 4. Dissolved substances [DO, salts, pH, minerals (hardness), etc.]

H.B.N. Hynes, 1970, THE ECOLOGY OF RUNNING WATERS, Chapter 9, “Factors Controlling Benthic Invertebrates” Other important factors: 5. Liability to drought and floods (flow regime) 6. Food 7. Competition between species 8. Shade 9. Zoogeography (historical-phylogenetic and ecological)

Habits Surface-dwelling “neuston” Skaters Surface breathers Climbers Swimmers Burrowers Sprawlers Clingers

Feeding Strategies Piercing-predator (>10μ3) Shredder-detritivore (>10μ3) Collector-gatherer (<10μ3)

Feeding Strategies: Shredding Detritivores, Microbes Entrainment Leaching Conditioning Ingestion Digestion Assimilation Excretion

Feeding Strategies Collector-filterer (<10μ3) Shredder-herbivore (>10μ3) Engulfer-predator (>10μ3)

Feeding Strategies: Scrapers

River Continuum Concept Gradient of physical variables from headwaters to mouth of a stream that result in a predictable community structure and function

River Continuum Concept

Nutrient Spiraling Concept