Distribution of helminths in the digestive tracts of New Zealand freshwater eels 1. Distribution of digeneans

摘要: The distributions of Stegodexamene anguillae and Telogaster opisthorchis in Anguilla dieffenbachii A. australis studied over two years are described. Peak occurrence S. was the anterior intestine, declining posteriorly, except for mature flukes under crowded conditions which predominated mid anteriorly posteriorly. T. rectum posterior intestine dieffenbachii; declined anteriorly. Distributions appeared to be maintained by selective site segregation. Flukes moved down tract, with or without subsequent loss, both host species held live examined after death. were lost before anguillae, larger parasite less mobile immature flukes. Fluke loss from electric‐fished more rapid than netted australis. Chilling freezing retarded movement in, ev...