Success and Potential Impacts of Rock Ramp Fish Passages in the Saginaw Bay Watershed Tracy Galarowicz, Ph.D. Department of Biology Institute of Great Lakes Research Central Michigan University
Central Michigan University - Brent Murry (USFWS) - Daelyn Woolnough - Clarence Fullard - Gabe Madel - Mel Haas Michigan State University - Dan Hayes - Jacob Stoller USFWS - Andrea Ania - Justin Chiotti - Andrew Briggs - Jim Boase Michigan DNR - Joe Leonardi - Jim Baker Acknowledgements
Recreation Flood control Water supply Power source Invasive species control http://www.mlive.com/news/grandrapids/index.ssf/2013/10/lyons_dam_delay.html Benefits of Dams
Alters stream habitat Biological impacts Block fish passage Change to fish assemblages Negatives of Dams
Aging dams Increase connectivity http://recovery.doi.gov/press/wpcontent/uploads/2009/09/chesaning-dam_before_09-30-091.pdf Dam Removal
Increase fish passage Retain impounded area Costs Rigorous scientific testing http://shiawassee-river.blogspot.com/_01_01_archive.html Rock Ramps
Evaluate success of a recently built (Shiawassee River) and pending (Cass River) rock ramp fish passage at meeting intended restoration goals: - increased upstream fish movement - reproductive success Project Goals
Above and below rock ramp and dam: Spring fish Egg deposition Summer fish assemblages Freshwater mussels Predator diet analyses Fish tagging Project Objectives
Study Sites
Shiawassee River Rock Ramp Study Sites
Cass River Dam Study Sites
Flint River Free Flowing Study Sites
Spring Electrofishing http://www.frankenmutharchives.org/issues/-03-31.pdf
Spring Electrofishing
20 15 Shiawasee Shiawassee River Rock Ramp CPUE 10 (# fish/minute) 5 0 Downstream 2013 Upstream 2013 White Sucker
20 15 Shiawasee Shiawassee River Rock Ramp CPUE 10 (# fish/minute) 5 0 20 15 CPUE 10 (# fish/minute) 5 0 Downstream Downstream 2013 Upstream Upstream 2013 Cass River Dam White Sucker
3 2 CPUE (# fish/minute) 1 Shiawasee Shiawassee River Rock Ramp 0 3 2 CPUE (# fish/minute) 1 Downstream 2013 Upstream 2013 Cass River Dam Northern Hogsucker 0 Downstream Upstream
12 8 CPUE (# fish/minute) 4 Shiawasee Shiawassee River Rock Ramp CPUE (# fish/minute) 0 12 8 4 Downstream 2013 Upstream 2013 Cass River Dam Redhorse species 0 Downstream Upstream
1.5 1.0 CPUE (# fish/minute) 0.5 Shiawasee Shiawassee River Rock Ramp 0.0 1.5 1.0 CPUE (# fish/minute) 0.5 Downstream 2013 Upstream 2013 Cass River Dam 0.0 Downstream Upstream Rockbass
2.0 1.5 Shiawasee River Rock Ramp Smallmouth Bass CPUE 1.0 (# fish/minute) 0.5 0.0 2.0 1.5 CPUE 1.0 (# fish/minute) 0.5 0.0 Downstream Downstream 2013 Upstream Upstream 2013 Cass River Dam
8 6 Shiawasee Shiawassee River Rock Ramp CPUE 4 (# fish/minute) 2 0 8 6 CPUE 4 (# fish/minute) 2 0 Downstream Downstream 2013 Upstream Upstream 2013 Cass River Dam Yellow perch
8 6 Shiawasee Shiawassee River Rock Ramp CPUE 4 (# fish/minute) 2 0 8 6 CPUE 4 (# fish/minute) 2 0 Downstream Downstream 2013 Upstream Upstream 2013 Cass River Dam Walleye
Fish eggs
Fish eggs
Fish eggs 300 250 200 # eggs/mat 150 100 50 0 31-Mar 300 250 200 # eggs/mat 150 100 50 0 31-Mar 10-Apr 30-Apr 20-May Downstream 10-Apr 30-Apr 20-May Downstream 31-Mar 10-Apr 30-Apr 31-Mar 10-Apr 30-Apr Shiawassee Shiawasee River Rock Ramp Upstream Upstream 20-May 9-Jun Cass River Dam 20-May 9-Jun
Summer Fish Assemblages
60 40 # species 20 0 60 40 # species 20 0 60 40 # species 20 0 Shiawassee River Rock Ramp Cass River Dam Flint River Free Flowing Downstream Upstream Redrawn from Stoller 2013 Summer Fish Assemblages
Shiawassee River - Rock Ramp Downstream Downstream Upstream Upstream Cass River - Dam Downstream Downstream Upstream Upstream Bluntnose Minnow Common/Striped Shiner Emerald Shiner Green Sunfish Mimic Shiner Rockbass Round Goby Smallmouth Bass Spotfin Shiner Other Flint River - Free Flowing Downstream Downstream Upstream Upstream Redrawn from Stoller 2013 Summer Fish Assemblages
10 8 6 #/person hour 4 2 0 60 50 40 #/person hour 30 20 10 0 Freshwater Mussels Shiawassee River Rock Ramp Cass River Dam Ellipse Fluted Shell Mapleleaf Mucket Plain Pocketbook Rainbow Round Pigtoe Threeridge Wabash Pigtoe Downstream Upstream http://www.dnr.state.mn.us/rsg/profile.html?action=elementdetail &selectedelement=imbiva4010#
Predator Diet Analyses
Downstream Upstream Shiawassee River Rock Ramp From Fullard 2014 Predator Diet Analyses
Downstream Upstream Cass River Dam From Fullard 2014 Predator Diet Analyses
Fish Tagging
# Recaptured Year Tag # Tagged Downstream Upstream Dart Tag 300 78 Walleye 0 2013 Dart Tag 463 3 Walleye 3 Redhorse 1 Northern Pike 2 Walleye 2 Redhorse Fish Tagging
Differences in fish assemblages above and below rock ramp and dam More eggs below rock ramp Mussels more abundant upstream than downstream Predator diets differ above and below dam Limited movement through rock ramp Summary
Rock ramps may provide access to habitat Varies among species Temporal variation Summary
Thank you!