Hysterothylacium aduncum (Nematoda: Anisakidae) Infecting a Herbivorous Fish, Siganus fuscescens, off the Taiwanese Coast of the Northwest Pacific

太平洋西北臺灣沿岸之象魚發生有鉤宮脂線蟲感染

施秀惠(Hsiu-Hui Shih)；鄭明修(Ming-Shiou Jeng)

宮脂線蟲 ； 褐籃子魚 ； 象魚 ； 箭蟲屬 ； 箭蟲 ； Hysterothylacium aduncum ； Siganus fuscescens ； Rabbitfish ； Sagitta sp. ； Chaetognath

Zoological Studies

41卷2期（2002 / 04 / 01）

208 - 215

英文

本研究中報告位於太平洋西北海域臺灣沿岸之水族發生有鉤宮脂線蟲感染，受感染者為膳食藻類的褐籃子魚（象魚）和浮游動物中的箭蟲。由箭蟲體腔內分離出此線蟲之第三期幼蟲，而在象魚腸道及胃中分離出第四期幼蟲和成蟲。本文中詳細描述第三、第四期及成蟲立特徵，測量並圖示其各種構造。因臺灣兩處海岸收集象魚標本，分別統計此線蟲之盛行率、平均密度和豐富度。最後根據調查所知可能之寄主，推測此線蟲在臺灣海域可能的生活史。

Hysterothylacium aduncum (Nematoda: Anisakidae) infecting a herbivorous fish, Siganus fuscescens, off the Taiwanese coast of the Northwest Pacific. Zoological Studies 41(2): 207-214. Hysterothylacium aduncum (Rudolphi, 1802) infecting a herbivorous fish, Siganus fuscescens, and 1 invertebrate zooplankton, a chaetognath, is reported off the Taiwanese coast of the Northwest Pacific. Third-stage larvae were found in the body coelom of the chaetognath, Sagitta sp. Fourth-stage larvae and adults were recovered from the stomach and intestines of S. fuscescens. Nematodes are described, measured, and illustrated. The prevalence of parasitic infection, mean intensity, and abundance were calculated from samples collected from 2 different Taiwanese coastal locations. The life cycle of H. aduncum, involving the host species considered, is also postulated.