Availability of caecal habitat as a density-dependent limit on survivorship ofLeptorhynchoides thecatusin green sunfish,Lepomis cyanellus

Author:

Ewald Julie A.,Nickol B. B.

Abstract

SUMMARYDistribution ofLeptorhynchoides thecatus(Acanthocephala: Rhadinorhynchidae) among the pyloric caeca and the relationship between site and rate of maturation were studied in laboratory infectons of 10, 25 and 40 cystacanths fed to green sunfish,Lepomis cyanellus. After 1 week fish fed at each intensity had significantly different numbers of worms. By the 3rd week post-infection, parasites disappeared from the anterior portion of the intestine. At this time the mean numbers of worms recovered from 25 and 40-cystacanth infections were not significantly different. At the end of the 1st week, the area where caeca join the alimentary tract (between caecal area) and caeca numbered 6 and 7 contained significantly more worms than the other sites. By the 3rd week post-infection only caecum 7 contained significantly more worms, and at 5 weeks there was no significant difference between the number of worms present in any caecum or the between caecal area. Initially worms in the more intense infections matured more slowly, but by the 3rd week post-infection there was no significant difference in the states of maturity. The rate of maturation was not related to the site occupied.

Publisher

Cambridge University Press (CUP)

Subject

Infectious Diseases,Animal Science and Zoology,Parasitology

Reference9 articles.

1. The activation of cystacanths of Polymorphus minutus (Acanthocephala) in vitro;Lackie;Parasitology,1974

2. Histological structure of the intestine and pyloric ceca of the green sunfish Lepomis cyanellus Rafinesque;Williams;Journal of Fish Biology,1989

3. Biology of gyrocotylideans with emphasis on reproduction, population ecology and phylogeny

4. The sites occupied by the acanthocephalan Pomphorhynchus laevis in the alimentary canal of fish

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