Abstract
The taxonomy, geographical distribution and external features of the zander Stizostedion lucioperca (L.) are described and details given concerning the diet, feeding behaviour, growth, longevity and reproduction of the species. Interrelationships with other species are considered. Growth data for the zander in Anglian rivers and land drainage channels are found to compare favourably with most examples of published data quoted for the species in Western European waters but maximum sizes reported for Russian waters are not achieved. The rapid development of a zander population in the Great Ouse Relief Channel is described, following introduction of the species in 1963, and the catch-rate statistics of a small group of specialist anglers are used conservatively to obtain minimum estimates for the population in 1966–67 and the likely prey biomass being consumed per annum during that period. Previous accounts concerning the progressive colonization of Anglian watercourses are updated and the implications of the transfer of zander to the Suffolk Stour by the Ely Ouse to Essex Water Transfer Scheme are described. The effects of the zander on the overall ‘quality’ of different types of fishery are discussed and an attempt is made to reconcile conflicting views expressed elsewhere.
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