Upper Midwest Environmental Sciences Center Mortality of waterbirds Mortality of waterbirds in the in the Upper Mississippi River Upper Mississippi River Jennifer Sauer; USGS—La Crosse, Wisconsin Dr. Rebecca Cole; USGS—Madison, Wisconsin Dr. Greg Sandland, UW-La Crosse Dr. Roger Haro, UW-La Crosse Jim Nissen; USFWS La Crosse District Ed Britton; USFWS Savanna District Upper Midwest Environmental Sciences Center
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Mortality of waterbirds in the Upper Mississippi River
Mortality of waterbirds in the Upper Mississippi River. Jennifer Sauer; USGS — La Crosse, Wisconsin Dr. Rebecca Cole; USGS—Madison, Wisconsin Dr. Greg Sandland, UW-La Crosse Dr. Roger Haro, UW-La Crosse Jim Nissen; USFWS La Crosse District Ed Britton; USFWS Savanna District. - PowerPoint PPT Presentation
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Upper Midwest Environmental Sciences Center
Mortality of waterbirds Mortality of waterbirds in the in the
Upper Mississippi RiverUpper Mississippi River
Mortality of waterbirds Mortality of waterbirds in the in the
Upper Mississippi RiverUpper Mississippi River
Jennifer Sauer; USGS—La Crosse, WisconsinDr. Rebecca Cole; USGS—Madison, WisconsinDr. Greg Sandland, UW-La CrosseDr. Roger Haro, UW-La CrosseJim Nissen; USFWS La Crosse DistrictEd Britton; USFWS Savanna District
Jennifer Sauer; USGS—La Crosse, WisconsinDr. Rebecca Cole; USGS—Madison, WisconsinDr. Greg Sandland, UW-La CrosseDr. Roger Haro, UW-La CrosseJim Nissen; USFWS La Crosse DistrictEd Britton; USFWS Savanna District
SphaeridiotremaSphaeridiotrema– reside in the small intestinereside in the small intestine– feed on blood, causing severe blood loss and feed on blood, causing severe blood loss and
anemiaanemia CyathocotyleCyathocotyle
– reside in the cecareside in the ceca– cause a disruption in water and electrolyte balancecause a disruption in water and electrolyte balance
Leyogonimus polyoonLeyogonimus polyoon– infects primarily the upper and middle areas
of the small intestine. – severe enteritis characterized by thickening
of the intestinal wall that blocks the lumen of the intestine
Upper Midwest Environmental Sciences Center
Why are we concerned?Why are we concerned?
Upper Midwest Environmental Sciences Center
Why are we concerned?Why are we concerned?
Upper Midwest Environmental Sciences Center
Total Mortality EstimatesTotal Mortality Estimates
Synopsis of on-going workSynopsis of on-going work
Upper Midwest Environmental Sciences Center
Lake Onalaska—2005 & 2007Lake Onalaska—2005 & 2007NWHC leadNWHC leadLake Onalaska—2005 & 2007Lake Onalaska—2005 & 2007NWHC leadNWHC lead
Upper Midwest Environmental Sciences Center
Prevalence of InfectionPrevalence of Infection
Overall prevalence for parasites at all sites Overall prevalence for parasites at all sites across entire season was 70.75%across entire season was 70.75%
Highest prevalence for a parasite was in August Highest prevalence for a parasite was in August 83.1%83.1%
Lowest prevalence for a parasite was in May Lowest prevalence for a parasite was in May 54.1%54.1%
Conclusion: Conclusion: BithyniaBithynia does not appear to be as does not appear to be as susceptible to NATIVE parasite species as susceptible to NATIVE parasite species as native snail speciesnative snail species