The rate of infection of the Pacific herring Clupea pallasii Valenciennes, 1847 (Clupeiformes: Clupeidae) with larval Anisakis simplex (Rudolphi, 1809) (Nematoda: Ascaridata)

Abstract

Data on the interannual and seasonal variations in the rate of infection of Pacific herring with larval nematodes Anisakis simplex in some waters of the Far Eastern seas are considered. A total of 5076 fish were examined. An analysis of dynamics in the infection rate showed its reduction from the spawning to feeding seasons. The relative abundance of infected fish that remained after spawning is estimated for various waters. The ways in which parasites are removed from fish and also the level of threat that this infection poses to humans are discussed.