Location
UMass Amherst
Start Date
28-6-2011 10:40 AM
End Date
28-6-2011 11:00 AM
Description
Downstream passage through hydroelectric facilities is a significant area of concern regarding the protection of emigrating silver-phase eels (Anguilla spp.) because eels residing upstream of dams must emigrate to achieve their biotic potential and because their complex life history, relatively large size, and unique physiology may result in high vulnerability to injury or mortality during passage, in tum resulting in lost productivity on the species/population level Efforts to develop and implement upstream passage of juvenile American eels over the past decade or so presumably will result in significant increases in numbers of adult eels requiring downstream passage as they reach maturity. Hydroelectric projects are often hydraulically complex and they present multiple passage routes, including turbines, spill and/or deep water gates, and bypasses that pose different risks for downstream passage, as a result route selection can have significant impacts on reproductive potential. Understanding the combination of passage route selection and relative survival by passage route is necessary to evaluate the impacts of a particular project, and subsequently estimate cumulative impacts in a basin where multiple dams are present. The route of passage used by emigrating eels is dependent on physiology and behavior as well as physical processes and project operations. Biotelemetry techniques, such as PIT, radio telemetry, and acoustic tags are suited to examine the behavior of emigrating eels at hydroelectric projects and have been used at several sites. Results of biotelemetry and passage survival studies have been applied to develop short-term and permanent downstream protection measures and can assist in the design of hydro-mechanical passage measures. Additionally, useful information regarding migratory behavior and passage is gained, sometimes challenging our pre-existing understanding of best practices.
Session B4- Question Answering and Problem Solving: Using Bio-Telemetry Monitoring Techniques to Assess Silver Eel Emigration at Hydroelectric Projects
UMass Amherst
Downstream passage through hydroelectric facilities is a significant area of concern regarding the protection of emigrating silver-phase eels (Anguilla spp.) because eels residing upstream of dams must emigrate to achieve their biotic potential and because their complex life history, relatively large size, and unique physiology may result in high vulnerability to injury or mortality during passage, in tum resulting in lost productivity on the species/population level Efforts to develop and implement upstream passage of juvenile American eels over the past decade or so presumably will result in significant increases in numbers of adult eels requiring downstream passage as they reach maturity. Hydroelectric projects are often hydraulically complex and they present multiple passage routes, including turbines, spill and/or deep water gates, and bypasses that pose different risks for downstream passage, as a result route selection can have significant impacts on reproductive potential. Understanding the combination of passage route selection and relative survival by passage route is necessary to evaluate the impacts of a particular project, and subsequently estimate cumulative impacts in a basin where multiple dams are present. The route of passage used by emigrating eels is dependent on physiology and behavior as well as physical processes and project operations. Biotelemetry techniques, such as PIT, radio telemetry, and acoustic tags are suited to examine the behavior of emigrating eels at hydroelectric projects and have been used at several sites. Results of biotelemetry and passage survival studies have been applied to develop short-term and permanent downstream protection measures and can assist in the design of hydro-mechanical passage measures. Additionally, useful information regarding migratory behavior and passage is gained, sometimes challenging our pre-existing understanding of best practices.
Comments
Steve Leach has 16 years of experience as a fisheries professional specializing in diadromous fish behavior and passage at hydroelectric dams. Steve grew up in Maryland, earned a B.S. in biology from Elon College, North Carolina in 1990, and an M.S. in oceanography and coastal science from Louisiana State University in 1993. Steve’s work experiences range from academic tostate resource agency to environmental consulting, and include: investigations of larval fish transport on the Gulf Coast of Louisiana while working for LSU’s Coastal Fisheries Institute; early life survival and production of anadromous species and Chesapeake Bay trophic dynamics while working for the University of Maryland’s Chesapeake Biological laboratory; diadromous fish restoration and endangered shortnose sturgeon research while working for the South Carolina Department of Natural Resources; and FERC hydroelectric project relicensing and license compliance issues in many U.S. rivers as an employee of Normandeau Associates, where he has worked since 2006.