Contributions to the Life History of Proteocephalus ambloplitis (Leidy)

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

“…Growth from plerocercoid I to plerocercoid I1 is obligatory whether it occurs in a second intermediate host or in the definitive host. Thus this cycle is similar to that of P. ambloplitis, except that parenteral development of plerocercoid I1 is obligatory in the latter (11,13). Obligatory parenteral growth may be a disadvantage, for if a bass ingests a preplerocercoid I1 of P. ambloplitis, the preplerocercoid I1 must migrate to the tissues in spite of being in the normal definitive host.…”

“…parallacticus could be stimulated to invaginate, since the scolex of P . ambloplitis develops while invaginated, and apparently remains invaginated for the early part of its growth within the second intermediate host (11).…”

“…During the past two decades four new species of Proteocephalus from various trout in North America alone (1,18,22,28) have been described. Life cycles of few proteocephalids have been studied in detail, although copepods are known intermediate hosts of several species, including five from North America (2,11,12,22,29). Most proteocephalids grow in fish which live in relatively warm waters.…”

An Ecological Study of Parasites of Some North Carolina Salamanders

“…Holl ( 1932) also found that the number of parasites increased with the age of a lake. In a study of an artificial lake, Hunter ( 1932) found an unusually low infestation with fish parasites. He concluded, however, that as the lake grows older, with the concomitant increase in snail fauna and macroscopic water plants for snail food and protection, the number of parasites will also increase.…”

Pathology of black bass hepatic tissue infected with larvae of the tapeworm Proteocephalm ambloplitis

“…From an historical perspective, P. ambloplitis has been regarded as a serious pathogen of basses, reducing spawning success in hatchery stocks (Moore, 1925;Bangham, 1927;Hunter, 1928) and in natural populations (Meyer, 1954). Thus, reproductive impairment of P. ambloplitis-infected host females, and perhaps also males, may be a significant factor in the regulation of game fish populations.…”