Greene, M. C. Dynamac International, Inc., greenem@mail.cor.epa.gov
LaVigne, H. C. Oregon State University, hank@mail.cor.epa.gov
Landers, D. H. U.S. Environmental Protection Agency, landers@mail.cor.epa.gov

 
COMPARISON OF SURVIVAL AND GROWTH BETWEEN LARGESCALE SUCKER (CATOSTOMUS MACROCHEILUS) WITH AND WITHOUT SURGICALLY IMPLANTED DUMMY RADIO TRANSMITTERS AS DEMONSTRATED WITH FIELD ENCLOSURES
 
Surgically implanted radio transmitters are commonly used to track individual fish movements for extended periods of time in river habitats. The effects of radio transmitter implantation on fish have been studied in numerous controlled laboratory and pond experiments. We compared survival and growth between juvenile largescale sucker Catostomus macrocheilus, captured by boat electrofisher, with and without surgically implanted dummy radio transmitters. Field enclosures placed in the fish's natural environment were used to more closely approximate conditions which would be encountered by radio-tagged and released fish. Thirty fish that met selection criteria had dummy radio transmitters surgically implanted and thirty other fish were retained as controls. All fish were measured for length and weight and maintained in field enclosures for sixty days. Lengths and weights of tagged and control fish were recorded at the conclusion of the study and relative growth rates were determined. Mortality rates of both groups were also compared. We present the preliminary results of this study which indicate the suitability of largescale sucker for telemetry studies.
 
Day: Thursday, Feb. 4
Time: Poster
Location: Sweeney Center
 
Code: CS57TH0663S