摘要：Understanding consumption patterns and preferences of particular
life stages for fish species can clarify potential dietary overlap and
identify energy flow within aquatic communities. Age-0 white bass
(Morone chrysops) have been documented to consume a variety of
prey items and zooplankton are a common occurrence. The importance
of particular zooplankton taxa and available sizes will likely
impact prey selectivity, which is not understood for age-0 white
bass. The objectives of this study were to evaluate food habits,
prey electivity, and size selectivity of age-0 white bass in an irrigation
reservoir from July to September 2015 and 2016. By number,
age-0 white bass consumed mostly zooplankton from July to
September. Consumption of fish become an important component
of the diet for 22% of fish starting at 80 mm TL. Calanoida were
the primary zooplankton taxa consumed and selected for by age-0
white bass. In relation to other zooplankton taxa, Calanoida were
one of the most abundant taxa groups available and age-0 white
bass displayed size selective feeding by consuming the larger
Calanoida available in the environment. While Calanoida are not
the largest taxa available, their high density appears to result in
higher consumption by age-0 white bass compared to other available
taxa.
