Occurrence of <i>Lernaea cyprinacea</i> (Copepoda) in Wild Ayu <i>Plecoglossus altivelis</i> and Several Other Fishes in the Shonai River, Japan

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  • 庄内川の天然アユおよびその他数種の魚類におけるイカリムシ<i>Lernaea cyprinacea</i> の寄生状況
  • 庄内川の天然アユおよびその他数種の魚類におけるイカリムシLernaea cyprinaceaの寄生状況
  • ショウナイガワ ノ テンネン アユ オヨビ ソノタ スウシュ ノ ギョルイ ニ オケル イカリムシ Lernaea cyprinacea ノ キセイ ジョウキョウ

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Abstract

Lernaea cyprinacea, known as an anchor worm, was found on wild ayu Plecoglossus altivelis collected in the Shonai River, Japan, from early June to middle September 2013, with the maximum prevalence of 64.3% in late August. The prevalence was positively correlated with water temperature and standard length of the fish. Most (90%) of parasites were found at the base of the fins. Impact of the parasite on ayu populations might be supported by high prevalence in individuals detained downstream. The parasite also infected four other fishes including Rhinogobius giurinus, Pseudogobius esocinus, Mugil cephalus cephalus, and Carassius auratus langsdorfii; the former three fishes were new hosts for L. cyprinacea in Japan.

Journal

  • Fish Pathology

    Fish Pathology 50 (2), 81-84, 2015

    The Japanese Society of Fish Pathology

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