Eric C. Hansen - Consulting Environmental Biologist

Projects

Cherokee Canal Corridor Management Strategy
Sep 23, 2014

Department of Water Resources Cherokee Canal Corridor Management Strategy Pilot Project, Butte ...

Recovery Tasks for Giant Garter Snake
Sep 23, 2014

Hansen, E.C.  2008.  Implementation of Priority 1, Priority 2, and Priority 3 Recovery Tasks ...

Response of the Giant Garter Snake to Water Primrose Removal at the Cosumnes River Preserve
Sep 23, 2014

Hansen, E.C., H. McQuillen, S. Sweet, S. Gala, and J. Marty.  2010.  Response of the Giant ...

Giant garter snake comparative pathology, health, and contaminant exposure
Sep 23, 2014

Hansen, E.C, R. Wack, R. Poppenga, K. Strohm, C. Johnson, D. Bunn, and R. Scherer.  2011.  ...

Volta Wasteway, Merced County, CA.
Sep 23, 2014

Level 2 Diversification/Incremental Level 4 Development Pilot Project On behalf of USBR and ...

Giant garter snake comparative pathology, health, and contaminant exposure

Hansen, E.C, R. Wack, R. Poppenga, K. Strohm, C. Johnson, D. Bunn, and R. Scherer.  2011.  Comparative pathology, health, and contaminant exposure within San Joaquin Valley and Sacramento Valley giant garter snake (Thamnophis gigas) populations. Report prepared for the Bureau of Reclamation (BOR) pursuant to BOR Agreement No. 08FG200042. March 31, 2011.

This study evaluated health, pathology (hematology, plasma biochemistry, parisitology, and bacterial flora) and contaminant exposure (selenium, total mercury, methyl mercury, boron, PCBs, and organophosphate (OP) and organochlorine (OC) pesticides directly in snakes, through diet, and in the environment) in giant garter snakes and a non-threatened congener within both declining and stable populations, providing the baseline data needed for more focused research directing species recovery.   (2008-2013)