Studies on the Ecology of the New Zealand Freashwater Eels. I. The Design and Use of an Electric Fishing Machine

Abstract

A portable electric fishing machine using pulse-modulated D.C. has been developed. Short-finned eels have been shown to occur in three streams in which they have not been previously found. It has been shown that the river population of long-finned eels is not entirely female. Total population densities have been calculated and a comparison is made with the population densities as measured by the baited trap method.