Protozoan and metazoan parasites of fishes from the headwaters of the Parsnip and McGregor Rivers, British Columbia: a study of possible parasite transfaunations

canada catostomus macrocheilus cestode cestodes cestodos digenea fishes freshwater fishes helminthe helminths helmintos monogenea nematode nematodes nematodos north america peces peces de agua dulce poisson (animal) poisson d'eau douce protozoa protozoaire trematode trematodes trematodos