Effects of the Gill Parasite Zeuxapta seriolae (Monogenea: Heteraxinidae) on the Sea Cage-cultured Amberjack Seriola dumerili (Risso, 1810) at Penghu Island (Pescadores), Taiwan

鰓吸蟲對澎湖海上箱網養殖紅魽鰺的影響

陸知慧(Chih-Hui Lu) ； 古鎮鈞(Chen-Chun Ku) ； 溫秋明(Chiu-Ming Wen) ； 陳秀男(Shiu-Nan Chen)

《臺灣水產學會刊》 39卷2期 (2012/06) Pp. 107-114

https://doi.org/10.29822/JFST.201206.0004

摘要

本研究報告鰓吸蟲（Zeuxapta seriolae）對澎湖海上箱網養殖紅魽魚參（Seriola dumerili）的影響。自發病箱網中隨意捕撈30尾紅魽魚參，發現盛行率為100％，而每尾魚受感染強度少則32隻，多則達到408隻。這些被鰓吸蟲感染地魚隻其外觀上表現正常但其鰓絲非常蒼白且分泌大量黏液。組織病理觀察發現這些鰓吸蟲藉由其固著器上的吸鋏在鰓薄板上爬行，導致上皮細胞增生進而使得整個鰓薄板受到破壞。經由光學顯微鏡及掃描式電子顯微鏡對鰓吸蟲進行顯微觀察後確認這些鰓吸蟲為Z. seriolae。本文為第一篇報導Zeuxaptosis影響澎湖海上箱網養殖紅魽的報告。

關鍵字

鰓吸蟲(Zeuxapta seriolae) ； 紅魽鰺(Seriola dumerili ； 澎湖 ； 箱網養殖

並列摘要

This paper reports an infestation of the cultured amberjack Seriola dumerili (Risso, 1810) with the gill fluke Zeuxapta seriola (Meserve 1938), which is thought to be the primary cause of significant mortality in the production sea cages at Penghu, Taiwan. The gross sign of the amberjack was normal. However, hypersecretion of mucus on pale gills, accompanied by large quantities of parasites, was observed in all examined fish. The flukes were morphologically identified as Z. seriolae using light and scanning electron microscopy. The parasitological analysis of 30 live amberjack collected from the infested cages showed that all the fish harboured Z. seriolae with intensities ranging between 32 and 408 parasites per fish. Histopathological examinations revealed that the parasites attached to the host by grasping one or two gill lamellae with each clamp of the haptor, which led to a hyperplastic epithelium and destruction of the lamellae. This is the first description of zeuxaptosis affecting sea cage-cultured amberjack at Penghu, Taiwan.

並列關鍵字

Seriola dumerili ； Zeuxapta seriolae ； Penghu ； Cage aquaculture