**The title, authors, and abstract for this completion report are
provided below. For a copy of the completion report, please contact the
author at MBoogaard@usgs.gov or via
telephone at (608) 781-6238. Questions? Contact the GLFC via
e-mail or via telephone at 734-662-3209**
AVOIDANCE BEHAVIOR OF JUVENILE LAKE
STURGEONS (ACIPENSER FULVESCENS) EXPOSED TO BAYLUSCIDE 3.2% GRANULAR SEA
LAMPREY LARVICIDE
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Michael A. Boogaard1,
Jane E. Rivera1, and Mark P. Gaikowski1
1 U.S. Geological Survey, Upper Midwest
Environmental Sciences Center, 2630 Fanta Reed Road, La Crosse, Wisconsin 54603
December 2008
Abstract
����������� Avoidance
of juvenile lake sturgeons < 100 mm in length in response to application of
the Bayluscide 3.2% Granular Sea Lamprey Larvicide was assessed.�
Clear plexiglas
columns (107 cm in height, 30.5 cm in diameter) to evaluate the potential for
the normally bottom-dwelling fishes to move vertically in the water column to
avoid niclosamide dissolving from the Bayluscide granules.�
Vertical migration of lake sturgeons to > 15 cm off the bottom of the
column was considered avoidance.�� Lake
sturgeons began displaying avoidance behaviors within 4 to 8 min after the granules
were applied and continued for up to 60 min.�
After 60 min, most or all of the sturgeons were near the surface in the
treated columns.� In contrast, little
movement above the 15-cm mark was observed at any time in any of the control
columns.� The results of this study are
similar to a previous study where juvenile lake sturgeons > 100 mm in length
showed the ability to avoid granular Bayluscide.� Taken together, we conclude that juvenile
lake sturgeons of any size range can detect and avoid granular Bayluscide applications.�