Predation by largemouth bass (Micropterus salmoides L.) is modeled as a Poisson renewal process, except for a modification to include diurnal variations in the likelihood of predation. The model simulates the distribution of numbers of prey in largemouth bass stomachs and the 'apparent' distribution of prey intercapture intervals for bass captured in 1980 and is validated against 1982 data. The apparent distribution of prey intercapture times, based on measurements of the length of time decomposing prey had been in largemouth bass stomachs, utilizes bass that have two or more prey in their stomach. Because most bass have zero or one prey in their stomach, this calculation errs seriously in biasing the predicted distribution toward short intercapture times. The simulation model, by allowing sampling regimes that are impractical in the field, estimates the true prey intercapture time distribution.
ASJC Scopus subject areas
- Ecological Modeling