On the Biology of Proteocephalus Parallacticus Maclulich (Cestoda) in Algonquin Park, Canada

Abstract

Proteocephalus parallacticusMacLulich is common throughout the year in lake trout (Salvelinus namaycush).

Life cycles of species of Proteocephalus, parasites of fishes in the Palearctic Region: a review

“…Eggs are spontaneously released after the tapeworms are placed in water (Freeman, 1964) and it seems that this release corresponds with the strategy of egg release under natural conditions. It has been observed (unpublished data) that eggs of some species, e.g.…”

“…It is recommended that further investigations are performed in order to confirm the suitability of embryonic hooks for species differentiation, as in oncospheres of pseudophyllidean tapeworms of the genus Diphyllobothrium (Hilliard, 1960). Proteocephalus oncospheres probably have no flame cells (Freeman, 1964), but these are present in oncospheres of some tapeworms, e.g. in Diphyllobothrium (Freeman, 1973).…”

“…In papers dealing with proteocephalideans, however, a somewhat different terminology has been used: (i) 'outer thin pliable membrane' (Freeman, 1964); 'enveloppe la plus externe' (Doby & Jarecka, 1966); 'hyaline swimming envelope' (Priemer, 1987) or 'external membrane' (de Chambrier & Rego, 1995); this membrane apparently corresponds to the 'capsule' after Rybicka (1966) and is thin and transparent; (ii) 'enveloppe médiane' (Doby & Jarecka, 1966); 'outer envelope' (Rybicka, 1966); or 'embryophore' (de Chambrier & Vaucher, 1994;Smyth, 1994); this membrane covers a thick granular layer (fig. 1); (iii) 'membrane interne' (Doby & Jarecka, 1966); 'internal envelope' (Rybicka, 1966;Smyth, 1994); this membrane is transparent, thin and it is closely applied to the inner border of the granular layer; normally it is not seen in intact eggs (Freeman, 1964).…”

Parasites of fishes from Laurel Creek, Ontario

“…Intensive parasitological investigations on fishes have been made in Ontario. Prominent among these are the studies by Bangham (1941), Bangham & Venard (1946), Dechtiar (1966), Freeman (1964), and Mizelle & Donahue (1944) from Algonquin Park, by Bangham (1955) and Mavor (1916) from Lake Huron, by Bangham & Hunter (1939) and Hunter & Bangham (1932, 1933 from Lake Erie, by Hanek & Fernando (1971a,b, 1972a,b, 1973 and Tedla & Fernando (1969a,b,c,d) from Lake Ontario, and by Dechtiar (1972) from the Lake of the Woods. Smaller habitats, particularly the streams, have been neglected.…”

Helminth and arthropod parasites of fishes in the mountain national parks of Canada

“…Specimens of P. parallacticus were recovered from lake trout S. namaycush in Upper Waterton Lake. This parasite occurs extensively in lake trout of eastern Canadian lakes (Hoffman, 1967;Freeman, 1964).…”