Proportion of Individuals as Insectivorous Cyprinids
Like many streams found in North America, cyprinids are the dominant insectivorous fish in
New Jersey (excluding Pineland streams). A shift from specialized invertebrate feeders to
generalists with flexible foraging behaviors often indicates poor conditions associated with
water quality and/or physical habitat degradation (Karr et al. 1986). Similar to the benthic
insectivore metric, insectivorous cyprinids in some instances, may indirectly measure the
effects of toxicity.