Caligus orientalis のコイに対する寄生例

概要

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An outbreak of Caligus orientalis (parasitic Copepoda) occurred in a fish farm of carp, Cyprinus carpio, at Tottori Prefecture in summer 1978, and many carp over 1 age in addition to the all individuals of 0 age were led to die. The farm has used the water of lake Togo-ike which communicates with the Sea of Japan through a passage of about 2 km long. In the year 1978, chlorinity of the water increased from March to September; it was measured 1380 ppm Cl<SUP>-</SUP> concentration in March, 4060 ppm in July and 7300 ppm in August in 0.5 m layer at the center of the lake. It is evident that the outbreak of the caligid on carp is attributed to a rise of chlorinity of the water as in a case of crucian carp in Lake Shinzi (Suzumoto, 1974).<BR>This is the first record of an outbreak of Caligus orientalis on carp.
日本魚病学会の論文