Environmental and Economic Impacts of Asian Carps in the ...

1 Environmental and Economic Impacts of Asian Carps in the Illinois RiverGreg G. SassIllinois River Biological StationIllinois Natural History SurveyPhoto by Nerissa MichaelsEnvironmental and Economic Impacts of Asian History of Asian Carps in the in Abundance from La Grange Reach, Illinois RiverIII. Key Uncertainties in Asian Carps Population DynamicsIV. Effects of Asian Carps on Native PlanktivoresV. Economic Impacts (+ and -)VI. Potential SolutionsI. Brief History of Asian Carps in the United States19732007 BHCP and SVCP introduced to (AR)1980199020001995 - BHCP in La Grange Reach, IL River1998 - SVCP in La Grange Reach, IL RiverIncrease in BHCP and SVCPin La Grange Reach, IL RiverBHCPSVCPE nvironmental and Economic Impacts of Asian History of Asian Carps in the in Abundance from La Grange Reach, Illinois RiverIII.

2 Key Uncertainties in Asian Carps Population DynamicsIV. Effects of Asian Carps on Native PlanktivoresV. Economic Impacts (+ and -)VI. Potential SolutionsII. Trends in Asian Carp Catches LTRMP, La Grange Reach, IL RiverAsian carp catch (no.)Year1980199020002010050010001500 BHCPSVCP100019901995200020052010 Year0200400600800 Asian carp catch (kg)BHCPSVCPII. Trends in Asian Carp Commercial Landings IL RiverYearlogeannual commercial harvestof Asian Carps (kg)1980199020002010051015* Rob Maher (IDNR) unproofed, draft quality data-Still, questions aboutwhether Asian Carps are increasing in abundance inIL RiverEnvironmental and Economic Impacts of Asian History of Asian Carps in the in Abundance from La Grange Reach, Illinois RiverIII.

3 Key Uncertainties in Asian Carps Population DynamicsIV. Effects of Asian Carps on Native PlanktivoresV. Economic Impacts (+ and -)VI. Potential SolutionsIII. 2007 IRBS Mark-Recapture Population Estimate for Asian CarpsPeoria Lock and DamFloy-taggingLily Lake Preferred HabitatBath ChuteRedneck FishingTournamentSpoon River -Floy-tagging;PreferredHabitatGoals:1. Mark-recapture PE for eacharea and La Grange Reach2. Estimates of daily growthon recaptured carp3. Characteristics of preferredhabitat (target for reduction)4. Aging and catch curves5. Comparison to MS River with Tim Spier s group (WIU)III. 2007 IRBS Mark-Recapture Population Estimate for Silver CarpLa Grange Reach, Illinois River100,000200,000300,000400,000 Silver carp population estimate2000300040005000373,331232,61416 4,3474,6672,9082,054*As of September perriver mileIII.

4 2007 IRBS Mark-Recapture Population Estimate for Silver CarpLGRSPRBCLLPLD0100,000200,000300,0004 00,000 Silver carp population estimate (no.)*1. La Grange Reach (LGR)= 232,6142. Spoon River (SPR)= 27,2943. Bath Chute (BC)= 22,5534. Lily Lake (LL)~ 8,0065. Peoria Lock and Dam (PLD)= 5,842*As of September 11 III. 2007 IRBS Mark-Recapture Population Estimate for Silver CarpLa Grange Reach, Illinois River300400500600700800 Silver carp biomass45678910 Metric tons750467330 Metric tonsper *As of September 1105010015020025001002003004005006007008 009001000 YXSNMHSHLFD01020304050010020030040050060 07008009001000 YXSNMHSHLFD02468101214160100200300400500 6007008009001000 MHLFD02468101214160100200300400500600700 8009001000 MHLFD02468101214161 112131415161718191101 MHLFD02468101214160100200300400500600700 8009001000 HLFDB ighead carp024681001002003004005006007008009001 000 SNMHLFD024681001002003004005006007008009 001000 XNMHLD0246810010020030040050060070080090 01000 HLD0204060801000100200300400500600700800 9001000

5 TMD0204060801000100200300400500600700800 9001000 MHLFD02040608010001002003004005006007008 009001000 HLDS ilver carp200020012002200320042005 III. 2007 IRBS Asian Carps Mark-Recapture Population Estimate10020030040050060070080090010001 100 Length (mm) per BarSVCPn = 3517 LTRMP*As of September 11 III. 2007 IRBS Asian Carps Mark-Recapture Population Estimate3004005006007008009001000 Length (mm) per BarBHCPn = 117 LTRMP*As of September 11 Environmental and Economic Impacts of Asian History of Asian Carps in the in Abundance from La Grange Reach, Illinois RiverIII. Key Uncertainties in Asian Carps Population DynamicsIV. Effects of Asian Carps on Native PlanktivoresV.

6 Economic Impacts (+ and -)VI. Potential SolutionsIV. Dietary Overlap of Native Planktivores and Asian CarpsStress: , 2005. Dietary overlap between bighead carp (H. nobilis) and silver carp (H. molitrix) with three native filter-feeding fishes of the Illinois and Mississippi rivers. Master s Thesis. University of Have Asian Carps Influenced Native Planktivore Body Condition? condition (Wr)Pre- Asian condition (Wr)Pre- Asian carpPost-gizzardshadbigmouthbuffaloIV. Have Asian Carps Influenced Native Planktivore Body Condition? condition (Wr)Post- Asian carpsPre- Asian carpsmean = = 624mean = = 2550P < decrease in gizzard shadbody condition following Asiancarps establishment-Only Asian carp commercialharvest explained significantvariability in condition declineIV.

7 Have Asian Carps Influenced Native Planktivore Body Condition?YearPost- Asian carpsPre- Asian carpsmean = = 817mean = = 1008P < condition (Wr)-5% decrease in bigmouth buffalo body condition followingAsian Carps establishment-Only Asian carp commercialharvest explained significantvariability in condition declineEnvironmental and Economic Impacts of Asian History of Asian Carps in the in Abundance from La Grange Reach, Illinois RiverIII. Key Uncertainties in Asian Carps Population DynamicsIV. Effects of Asian Carps on Native PlanktivoresV. Economic Impacts (+ and -)VI. Potential SolutionsV. Economic Impacts Commercially Important Species19901995200020052010 Year234567891011 Bigmouth buffalo mean CPUE-Statistical significant declinesin bigmouth buffalo CPUE overtime in LTRMP-Lowest recorded CPUE in 2005and 2006V.

8 Economic Impacts Recreationally Important Species19901995200020052010 Year0123456789 Electrofishing CPUE (fish/run)BGLMBBCWCLa Grange Reach - LTRMP-Statistically significant declines in centrarchid catches over time in LTRMP-Cannot be solely attributed toAsian Carps , but may be compounding effectsV. Economic Impacts Hypothetical Physics of Collision-Boat + Passenger = kg-Initial Velocity = - to m/s-Final Velocity = 1 m/s-Collision Time = sWhat is the force of the collision on the boat driver?V. Economic Impacts Hypothetical Physics of Collision01020304050607080 Boat Speed (mph)0100000200000300000400000 Force Exerted on Driver (Newtons)Force of a middleweight boxer s punch!

9 Force of a 1500 kg vehiclehitting a brick wall at 35 mph!Potential Solutions Prevention of Introduction Population Reduction - Market development- Commercial fishing- Pinpoint preferred habitats Electric Barrier Disconnection of Illinois River to Lake Michigan?Pertinent Question The pertinent question may not be whether Asian Carps can survive in the Great Lakes, but rather, which tributaries will be suitable habitat for Asian Carps establishment ? Asian carp spawning below Peoria Lock and DamAugust 23, 2007 Photograph by Kevin S. Irons, Illinois River Biological StationAcknowledgements The Long-term Resource Monitoring Program The Army Corps of Engineers The USGS Upper Midwest Environmental Sciences Center The Illinois Natural History Survey The Illinois Department of Natural Resources The Fish and Wildlife Servic