Description of two new actinosporean types froma brook of Fuji Mountain, Honshu, and fromChitose River, Hokkaido, Japan

Diseases of Aquatic Organisms

Hiroshi Yokoyama¹  Kazuo Ogawa¹  Shigehiko Urawa¹  Tarmo Timm¹  Csaba Székely¹ 

关键词: Aurantiactinomyxon;    Siedleckiella;    Actinospore;    Myxospore;    Tubifex tubifex;    Lumbriculus variegatus;    Oligochaete alternate hosts;    Japan;   

DOI  :  10.3354/dao053127

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

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 oligochaetespecimens 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 sametime 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% wereinfected 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 positiveoligochaetes in the case of all the actinosporean types. Two of the actinospore types (aurantiactinomyxon and siedleckiella) presented here have not been previously described.

【 授权许可】

Unknown