北海道サロマ湖におけるヒメエゾボラのインポセックスと寄生虫感染の発生頻度とそれらの関連性

DOI 日本農学文献記事索引 Web Site 被引用文献1件 参考文献27件
  • MIRANDA Richard M.
    Laboratory of Marine Biodiversity, Graduate School of Fisheries Sciences, Hokkaido University
  • 藤永 克昭
    Faculty of Social Welfare, Dohto University
  • ILANO Anthony S.
    Faculty of Marine Biology, San Carlos University
  • 中尾 繁
    Laboratory of Marine Biodiversity, Graduate School of Fisheries Sciences, Hokkaido University

書誌事項

タイトル別名
  • Incidence of Imposex and Parasite Infection in Neptunea arthritica at Saroma Lagoon and Their Relationship

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抄録

The incidence of imposex and parasite infection, and their relationship with Neptunea arthritica in Saroma Lagoon was evaluated. Imposex occurred in 30.9% of the females examined, and 25.1% of the males and females were infested by parasites. No difference in infection ratio was detected between the sexes, or between mature and immature individuals. The parasite infection index also showed no difference between sexes (male, 0.079 and female 0.074) . Parasite infection also showed no temporal pattern, but in general tended to be higher in large individuals than smaller ones in both sexes. A total of 19.3% of the females showed imposex and were infested by parasites. The number of infected whelks with signs of imposex showed a sharp decrease with the increase in imposex degree. This was clearly indicated by the proportion of infected whelks in imposex stage 1 (28.6%), 2 and 3 (7.4 and 10.3%, respectively) . The results suggests that the popu-lation of N. arthritica in the lagoon continue with the recovering trend based on the decrease of Imposex frequency, as refereed in previous works, and parasitism appears to be the most serious disruptive phenomenon to a complete restoration of this population, based on it's proportion.

収録刊行物

  • 水産増殖

    水産増殖 55 (1), 9-15, 2007

    日本水産増殖学会

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