Metacercariae of Digenetic Trematoda, Neascus spp. in Chiselmouth, Acrocheilus alutaceus from the Willamette River

  • Chun, Kae-Shik (Department of Environmental Health, Yongin University)
  • Published : 2004.11.01

Abstract

During a survey of the helminth parasites of fresh water fishes in Willamette River, metacercariae of Neascus spp. were found on examination of muscle, spinal cord, fin and skin of Chiselmouth, Acrocheilus alutaceus. One hundred percent of 19 Chiselmouth examined were found to be infected with digenetic trematodes. The prevalence of infection was higher in muscle, varying from $95\%\;and\;100\%$. Higher levels were present in muscle, such that the $100\%$ level being found in upper anterior, lower anterior and posterior. Small numbers of metacercariae were found on the fin and skin. The commonest sites of infection were the musculature and spinal cord. Intensities of Neascus spp. metacercariae tended to be and high levels in muscle and spinal cord. Those were low levels occurred in the fin and skin. There was a high degree of Neascus spp. in the occurrence of digenetic trematode from Chiselmouth.

Keywords

References

  1. Bykhovsky, B.E. et al. : Key to parasites of freshwater fishes of the U.S.S.R Publ. House Acad. Sci. U.S.S.R., Moscow-Leningrad, 1962
  2. Carl, G.C. and Clemens, W.A. : The fresh-water fishes of British Columbia. British Columbia Provo Mus., Handbook. 5, 2nd ed., 136pp. 1953
  3. Chandler, A.C. : Studies on metacercariae of Perea flavescens in Lake Itasca, Minnesota. The American Midland Naturalist, 45(2), 711-721, 1951 https://doi.org/10.2307/2422000
  4. Dollfus, R.P.H. : Apercu general sur l'histoire naturelle des parasites animaux de la morne atlantoarctique Gadus callarias (morhua L.). Encycl. Biol. 43
  5. Hoffman, G.L. : Parasites of North American freshwater fishes. Univ. Calif. Press., Berkeley and Los Angeles, 486p, 1967
  6. Morgolis, L., Esch, G.W., Holmes, J.C., Kuris, A.M. and Schad, G.A. : The use of ecological terms in parasitology. J. Parasitol. 68, 131-133, 1982 https://doi.org/10.2307/3281335
  7. Lonton, E. : Trematodes from fishes mainly from the Woods Hole region. Massachusetts. Proc. U.S. Nat. Mus., 88, 1-172, 1940 https://doi.org/10.5479/si.00963801.88-3078.1
  8. Poole, B.C. and Dick, T.A. : Metacercarial distribution of Apophallus brevis (Heterophyidae) in yellow perch (Perea flavescens) from the Heming Lake study area. Can. J. Zool. 61, 2104-2109, 1983 https://doi.org/10.1139/z83-276