- Samuelian, Dale.
- A population of three-spined sticklebacks Gasterosteus
aculeatus L. from the San Joaquin River below Friant Dam
near Fresno, California, was found to be infected with the
plerocercoid larval stage of a pseudophyllidean cestode,
Schistocephalus solldus (Muller, 1776).
Schistocephalus solidus belongs to the class Cestoidea,
subclass Cestoda, order Pseudophyilidea, family Dibothrio-
cephalidae. During the plerocercoid larval stage it is a
coelomic tapeworm of the three-spined stickleback Gasterosteus
aculeatus. Members of this genus are widely distributed in
many parts of the world, with the majority of infections
being reported in Great Britain and Ireland (Smyth, 19-4-6;
Hopkins and McCaig, 1963; Arme and Owen, 1967; Chappell, 1969a,b;
and Pennycuick, 1971a, b, c, d. In California, S. solidus
has been studied by Markley (19^-0) and Haderlie (1953).
The present study will: (1) demonstrate the seasonal
incidence and variation of the parasite infection, (2) indicate
the differences in the sizes of the infection in stickle-
backs of different sexes and sizes, and (3) show the frequency
distributions of the parasite within the host population.
- Resource Type:
- Masters Thesis
- Campus Tesim: