Microsporidia of the genera Thelohania (Thelohaniidae) and Ameson (Pereziidae) in two species of lithodid crabs from the Sea of Okhotsk

Author： Ryazanova T.   Eliseikina M.  

Publisher： MAIK Nauka/Interperiodica

ISSN： 1063-0740

Source： Russian Journal of Marine Biology, Vol.36, Iss.6, 2010-11, pp. : 435-442

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Abstract

Diseases caused by microsporidia were found in the red king crab Paralithodes camtschaticus and the blue king crab P. platypus that inhabit the Sea of Okhotsk. Based on the histological features of the invasion and data on the morphological structure of the parasites, the microsporidia were assigned to the genera Thelohania and Ameson. Infected crabs exhibited severe destructive changes of their internal organs along with sharply pronounced external signs of disease. During the observation period, the microsporidian invasion was only found in females and young (unmarketable size) males from August to mid-October. Later, until mid-December, no diseased crabs were found.

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