Movement of Coarse Fish in Rivers

Abstract

IT is generally accepted¹ that coarse fish move to shallow water in the spring in order to spawn, and retire to deep water in the winter, but how extensive these movements are is not known. Work on American species has given rise to the concept of a ‘home range’² which may be restricted to as little as a few 100 ft., and it has also been suggested that some species, including carp, are best regarded as having populations composed of mobile and sedentary fractions the relative proportions of which determine the degree of mobility shown by the species³.