Prey selection by sauger in Watts Bar Reservoir, Tennessee, as affected by cold-induced mortality of threadfin shad

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7294649

McGee, M V; Griffith, J S

Prey selection by sauger (Stizostedion canadense) was monitored from November 1976 through March 1977 in the portion of Watts Bar Reservoir, Tennessee, near the Kingston Steam Plant. Threadfin shad (Dorosoma petenense) provided the entire forage base for sauger until the population of the former species was almost completely eliminated by low temperatures in December and January. Some sauger switched to alternate prey, but greater than 75% of stomachs in February-March were empty. Food consumption of sauger smaller than 30 cm in length was most severely restricted by the loss of forage. Digestive rate studies in the laboratory indicated digestion continued at a reduced, but still effective, rate at temperatures less than 10 C.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 7294649
• Report Number(s): CONF-771046-1
• Country of Publication: United States
• Language: English

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WATTS BAR-1 REACTOR
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