Consequences of seasonal variation in reservoir water level for predatory fishes : linking visual foraging and prey densities

  title={Consequences of seasonal variation in reservoir water level for predatory fishes : linking visual foraging and prey densities},
  author={Stephen L. Klobucar and Phaedra Budy},
In reservoirs, seasonal drawdown can alter the physical environment and may influence predatory fish performance. We investigated the performance of lake trout (Salvelinus namaycush) in a western reservoir by coupling field measurements with visual foraging and bioenergetic models at four distinct states (early summer, mid-summer, late summer, and fall). The models suggested that lake trout prey, juvenile kokanee (Oncorhynchus nerka), are limited seasonally by suitable temperature and dissolved… CONTINUE READING
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