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北日本におけるサケ科魚類採卵親魚の魚類ウィルス保有状況について ― 昭和51年~昭和61年 ―

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Title: 北日本におけるサケ科魚類採卵親魚の魚類ウィルス保有状況について ― 昭和51年~昭和61年 ―
Other Titles: Incidence of Fish Pathogenic Viruses among Anadromaus Salmonid in Northern Part of Japan (1976 - 1986)
Authors: 吉水, 守1 Browse this author →KAKEN DB
野村, 哲一2 Browse this author
粟倉, 輝彦3 Browse this author
木村, 喬久4 Browse this author →KAKEN DB
Authors(alt): Yoshimizu, Mamoru1
Nomura, Tetsuichi2
Awakura, Teruhiko3
Kimura, Takahisa4
Issue Date: Mar-1988
Publisher: 北海道さけ・ますふ化場
Journal Title: 北海道さけ・ますふ化場研究報告
Journal Title(alt): Scientific reports of the Hokkaido Salmon Hatchery
Volume: 42
Start Page: 1
End Page: 20
Abstract: From September 1976 to November 1986, we collected 5,068 ovarian fluid specimens from 5 species of 10,028 females and 21 seminal specimens from 2 species of 155 males of mature salmonid fish, including to masu (Oncorhynchus masu), chum (O. keta), pink (O. gorbuscha), kokanee salmon (O. nerka) and rainbow trout (Salmo gairdneri) from 26 catching stations located in Hokkaido and 5 places in Honshu (the main island of Japan), 6 hatcheries in Hokkaido and 7 in Honshu and 10 fish farms and 1 lake in Hokkaido. Also, 161 mixed kidney and spleen specimens were taken from 805 of these fish. Furthermore, 139 tumor tissues observed among 4,288 fish were employed for virus inspection. Blood smears prepared from 660 fish were employed in microscopical examination for evidence of VEN, and thin sections of blood of these were observed by electron microscopy. Four viruses have been isolated during the course of this investigation. IHNV was found in ovarian fluid of chum salmon from Abashiri River in 1976. During the period from 1976 through 1986, IHNV has been recovered 9 times from fish at 7 collection sites. OMV was first discovered in 1978 from masu salmon at Otobe Salmon Hatchery. At all sites permitting collection of 60 specimens with the exception of 3 hatchery, OMV has subsequently been isolated from ovary fluid or from epithelial tumor tissue around the mouth of mature masu salmon. It has not been found in the other species of fish. Incidence of OMV has decreased since we suggested iodophore treatment at the eyed egg stage. CSV was isolated from the kidney of healthy chum salmon at Tokushibetsu Hatchery in 1978 but during the period from 1979 through 1986, CSV has not been found from mature fish. IPNV was isolated from tumor tissue of masu salmon at Aomori Prefectural Fisheries Experimental Station in 1981, at this time IHNV and OMV were isolated from the same tumor tissue.
1. IHNVは頻度こそ低いものの広い範囲で時折分離された。本ウィルス検出時には早期に有効な対策を講じる必要のあることが示唆された。2. OMVは1978年の発見以来調査が進むにつれサクラマスあるいはヤマベを中心に広範囲での分布が明らかとなり,サクラマスの増養殖を計るに際し無視し得ないウィルスであることが明らかとなった。3. CSVは従来オルファンウィルスとされてきたが,1986年にサクラマスの全滅被害が発生し,本ウィルスに対しても今後十分注意を払う必要があると考える。4. 道東のシロサケ,カラフトマス中心にVENウィルス感染が明らかとなり,冷後本ウィルスの分布およびサケ科魚類に及ぼす影響についても検討する必要があると考える。
Type: article
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 吉水 守

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