Description of two new actinosporean types from a brook of Fuji Mountain, Honshu, and from Chitose River, Hokkaido, Japan

Csaba Székely, Hiroshi Yokoyama, Shigehiko Urawa, Tarmo Timm, Kazuo Ogawa

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Actinospore infection of oligochaetes living in the mud of 3 freshwater biotopes in Japan was studied. Using the cell-well plate method, a new aurantiactinomyxon type was found in 0.77% of the examined Tubifex tubifex oligochaete specimens from a brook near Yamanashi Prefectural Fisheries Experimental Station on Fuji Mountain. In 0.14% of Lumbriculus variagetus collected from Chitose River, near Chitose Salmon Hatchery, a new siedleckiella type was found, while at the same time 8.1% of the Lumbriculus spp. oligochaetes released triactinomyxons of Myxobolus arcticus. Of the examined Rhyacodrilus komarovi oligochaetes collected from the Mena River system, Hokkaido, 0.2, 0.6, 0.5 and 0.8% were infected with echinactinomyxon, neoactinomyxum and 2 types of triactinomyxon spores, respectively, and described in our previous paper. The oligochaetes released actinospores for several weeks. Actinospore infection showed high intensity in positive oligochaetes in the case of all the actinosporean types. Two of the actinospore types (aurantiactinomyxon and siedleckiella) presented here have not been previously described.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalDiseases of Aquatic Organisms
Volume53
Issue number2
DOIs
Publication statusPublished - Feb 13 2003

Keywords

  • Actinospore
  • Aurantiactinomyxon
  • Japan
  • Lumbriculus variegatus
  • Myxospore
  • Oligochaete alternate hosts
  • Siedleckiella
  • Tubifex tubifex

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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