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[Study on the cestodes in Theragra chalcrogamma]

Jong Phil Chu1

  • 1Department of Parasitology, School of Medicine, Kyung-Hee University, Korea.

Kisaengch'Unghak Chapchi. the Korean Journal of Parasitology
|June 1, 1984
PubMed
Summary

This study identified five new cestode species in Korean walleye pollock guts: Khawia sinensis, Eulacistorhynchus chiloscyllius, Tentacularia coryphaena, Pseudonybelinia odontacantha, and Nybelinia lingualis. These findings expand the known parasite diversity in this fish species.

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Area of Science:

  • Marine Biology
  • Parasitology
  • Ichthyology

Background:

  • Intestinal parasites, particularly cestodes, can impact fish health and aquaculture.
  • Theragra chalcogramma (walleye pollock) is an important commercial fish species in Korea.
  • Understanding the parasite fauna of fish is crucial for ecological and economic reasons.

Purpose of the Study:

  • To investigate and identify cestode parasites in the intestines of Theragra chalcogramma from Korean waters.
  • To document new species records of cestodes for Korea.
  • To provide detailed morphological descriptions of the identified cestode larvae.

Main Methods:

  • Collection and morphological examination of cestode larvae from walleye pollock guts.
  • Microscopic analysis of section slides of cestode larvae.

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  • Identification based on established taxonomic descriptions (Schmidt and Yamaguti).

    • Main Results:

    • Five cestode species were identified: Khawia sinensis, Eulacistorhynchus chiloscyllius, Tentacularia coryphaena, Pseudonybelinia odontacantha, and Nybelinia lingualis.
    • All identified species represent new records for Korea.
    • Detailed morphological characteristics of each species' scolex, bothridia, tentacles, and bulbs were documented.

    Conclusions:

    • The study successfully identified and described five novel cestode species in Theragra chalcogramma in Korea.
    • This research contributes significantly to the knowledge of fish parasites in Korean marine ecosystems.
    • The findings highlight the importance of continued parasite surveys in commercially important fish stocks.