Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Effects of Water Velocity and Trash Rack Architecture on Juvenile Fish Passage and Interactions: A Simulation
 

Summary: Effects of Water Velocity and Trash Rack Architecture on
Juvenile Fish Passage and Interactions: A Simulation
EMILY Y. FLOYD*
Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, California 92182,
USA; and Graduate Group in Ecology, 2148 Wickson Hall, University of California,
Davis, California 95616, USA
ROGER CHURCHWELL
1
California Department of Water Resources, 3251 S Street, Sacramento, California 95816, USA
JOSEPH J. CECH, JR.
Department of Wildlife, Fish, and Conservation Biology, University of California,
1 Shields Avenue, Davis, California 95616, USA
Abstract.--Many resident and migratory fish species have experienced population declines due to
modification of estuarine ecosystems. Fish screens (or louvers) have been designed to guide fish away from
the diversion pumps, and trash racks have been placed upstream of the screens to intercept aquatic plants and
debris. Although small fish may aggregate around these structures, potentially increasing their vulnerability to
predators, we know little about the behavior, performance, and survival of fish near trash racks. To determine
how trash rack flow regime and architecture influence fish behavior, we exposed juvenile threadfin shad
Dorosoma petenense and winter-run Chinook salmon Oncorhynchus tshawytscha to three water velocities
and two bar-spacing treatments in a circular tank bisected by a simulated trash rack. Our results suggest that

  

Source: Anderson, Todd - Department of Biology, San Diego State University

 

Collections: Biology and Medicine; Environmental Sciences and Ecology