The distribution, biology, and status of the fishes Campostoma anomalum, Clinostomus elongatus, Notropis photogenis (Cyprinidae), and Fundulus notatus (Cyprinodontidae) in Canada

Abstract

Campostoma anomalum, Clinostomus elongatus, Notropis photogenis, and Fundulus notatus in Canada are confined to a few streams in southern Ontario and are considered rare or threatened in this country. The distribution of C. anomalum shows dramatic expansion in the Thames River drainage over the past decade. Clinostomus elongatus has a disjunct distribution and has apparently been extirpated from several watersheds owing to habitat degradation. Information on the stability of N. photogenis and F. notatus populations is lacking. Both C. anomalum and N. photogenis are rheophilic and occur in relatively high gradient streams. Clinostomus elongatus occurs mainly in cool, clear headwaters. Fundulus notatus is confined to turbid and sluggish or stagnant streams. Factors affecting the vulnerability of these species, based on habitat requirements, are described and measures to conserve their habitats are suggested. Observations on growth, reproduction, feeding, predation, and parasitism are also described.