Rumen Ciliate Protozoa of the Blue Duiker (Cephalophus Monticola), With Observations on Morphological Variation Lines Within the Species Entodinium Dubardi

J Eukaryot Microbiol. Mar-Apr 1994;41(2):103-11. doi: 10.1111/j.1550-7408.1994.tb01481.x.


Protozoal concentrations were determined in rumen and cecal contents of 20 blue duikers (Cephalophus monticola). Ten animals of each sex were fed either a high concentrate or high roughage diet. Rumen protozoa were present in 19 of the 20 animals and concentrations ranged from 4.5 to 33.7 x 10(6) per g of rumen contents. At the higher concentrations, protozoal cells equaled between 30-40% of the total rumen contents volume. No protozoa were found in cecal contents. Weight of rumen contents was higher in females than in males (P < 0.01), and rumen protozoa concentrations were higher in males (P < 0.05) and in those animals fed the high concentrate diet (P < 0.05). All the protozoa were identified as belonging to a single species, Entodinium dubardi. However, an average of about 30% of the E. dubardi cells varied from the typical morphology of this species. These cells appeared to be on variation lines leading toward 7-10 other non-caudate species of Entodinium. The present data were used to evaluate and discuss the concept of variation lines within E. dubardi.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antelopes / parasitology*
  • Female
  • Genetic Variation
  • Kinetofragminophorea / cytology
  • Kinetofragminophorea / isolation & purification*
  • Male
  • Rumen / parasitology*
  • Species Specificity