H. Peltonen et al., DIET AND PREY SELECTION OF PIKEPERCH (STIZOSTEDION-LUCIOPERCA (L)) INLAKE VESIJARVI ANALYZED WITH A LOGIT MODEL, Annales zoologici Fennici, 33(3-4), 1996, pp. 481-487
Diet and prey selection of piscivorous pikeperch (Stizostedion luciope
rca (L.)) was studied with a multicategory legit model. Statistically
significant (log-likelihood statistics, p < 0.05) differences were fou
nd in the proportions of pikeperch feeding on different fish species a
t different seasons and at various weights. The differences among the
two sampling years were found non-significant. The proportion of pikep
erch feeding on perch (Perca fluviatilis L.) increased as the abundanc
e of perch increased in the sampling area. It can be concluded that pi
keperch are positively selective for perch. The logistic approach was
found useful in order to analyse the feeding pattern of pikeperch.