{"title":"Hygiene Practices for Aquaculture and Hatchery Management","authors":"H. Kasai, Jun Nagata","doi":"10.3147/JSFP.55.111","DOIUrl":"https://doi.org/10.3147/JSFP.55.111","url":null,"abstract":"","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"128 1","pages":"111-116"},"PeriodicalIF":0.6,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85718359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
― Clear peaks of trematode Clinostomum complanatum cercariae detection rate in snails Radix auricularia japonica were observed around July in a goldfish Carassius auratus farm in Aichi Prefecture. Effects of Trichlorfon and praziquantel were examined against C. complanatum in artificially infected goldfish. Both were effective in the early phase of infection in goldfish cohabitating with infected snails. Trichlorfon was effective in a 300 mg/t bath treatment for 13 d and praziquantel was effective with 3 d of oral administration at 138 mg/kg body weight. Tratements with trichlorfon or praziquantel around July may reduce infection of C. complanatum without serious damage to fish caused by the excystation induced by the drug treatment in ornamental fish farms.
{"title":"Seasonality of Clinostomum complanatum Cercariae in the Snail Host Radix auricularia japonica and Drug Treatment of the Parasite in Goldfish Carassius auratus","authors":"Jumpei Arakawa, Ko Suzuki, R. Ishii","doi":"10.3147/JSFP.55.162","DOIUrl":"https://doi.org/10.3147/JSFP.55.162","url":null,"abstract":"― Clear peaks of trematode Clinostomum complanatum cercariae detection rate in snails Radix auricularia japonica were observed around July in a goldfish Carassius auratus farm in Aichi Prefecture. Effects of Trichlorfon and praziquantel were examined against C. complanatum in artificially infected goldfish. Both were effective in the early phase of infection in goldfish cohabitating with infected snails. Trichlorfon was effective in a 300 mg/t bath treatment for 13 d and praziquantel was effective with 3 d of oral administration at 138 mg/kg body weight. Tratements with trichlorfon or praziquantel around July may reduce infection of C. complanatum without serious damage to fish caused by the excystation induced by the drug treatment in ornamental fish farms.","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"10 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84572714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Larval Cucullanid Nematode Infection in the Liver of Ayu","authors":"Mitsuru Okamoto, A. Okino, M. Freeman, K. Ogawa","doi":"10.3147/JSFP.55.142","DOIUrl":"https://doi.org/10.3147/JSFP.55.142","url":null,"abstract":"","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"10 1","pages":"142-150"},"PeriodicalIF":0.6,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88577853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Ogawa, Hirotaka Mizuochi, Tomofumi Yamaguchi, S. Shirakashi, Nanami Asai, Y. Agawa
― The grow-out stage of leopard coral grouper Plectropomus leopardus reared in land-based tanks in Okinawa Prefecture, Japan, were often heavily infected with capsalid monogeneans, up to a few millimeters in size, on the fins and skin. Morphological investigation revealed that the parasite belongs to Benedenia (Monogenea: Capsalidae). Benedenia akajin n. sp. is proposed here and described morphologically, based on the unique structures in the vaginal duct with a thick-walled distal one-third, the penis with a teat-shaped tip and the testes smaller than the germarium. A positive relationship between the lengths of three haptoral sclerites (anterior sclerites and anterior and posterior hamuli) and body length indicates that these taxonomically important structures keep growing as the parasite ages. Molecular analyses showed that the present species is most closely related to B. epinepheli and B. sargocentron , with the highest 28S rDNA identity of 98.1%, but no identical sequences were found in the database. Both morphological and molecular evidences suggest Benedenia akajin n. sp. as an undescribed species, and this new skin fluke deserves further investigations for the stable aquaculture of P. leopardus .
-在日本冲绳县陆基水池中饲养的豹珊瑚石斑鱼plectroomus leopardus的生长阶段，其鳍和皮肤上经常严重感染单系胡椒菌，其大小可达几毫米。形态调查表明该寄生虫属于贝尼德尼亚(单目:辣椒科)。根据阴道导管的独特结构(远端有三分之一厚壁)、阴茎尖呈乳头状、睾丸比胚乳小，本文提出并从形态学上描述了Benedenia akajin n. .。三个上肢硬膜(前硬膜和前后系带)的长度与体长呈正相关，表明这些在分类学上重要的结构随着寄生虫年龄的增长而不断增长。分子分析表明，该种与B. epinepheli和B. sargocentron亲缘关系最近，28S rDNA同源性最高，达98.1%，但数据库中未发现相同序列。形态学和分子生物学证据均表明，该皮肤吸虫是一种未被描述的新物种，值得进一步研究，为豹皮吸虫的稳定养殖奠定基础。
{"title":"Benedenia akajin n. sp. (Monogenea: Capsalidae) from Leopard Coral Grouper Plectropomus leopardus Reared in Okinawa Prefecture, Japan","authors":"K. Ogawa, Hirotaka Mizuochi, Tomofumi Yamaguchi, S. Shirakashi, Nanami Asai, Y. Agawa","doi":"10.3147/JSFP.55.117","DOIUrl":"https://doi.org/10.3147/JSFP.55.117","url":null,"abstract":"― The grow-out stage of leopard coral grouper Plectropomus leopardus reared in land-based tanks in Okinawa Prefecture, Japan, were often heavily infected with capsalid monogeneans, up to a few millimeters in size, on the fins and skin. Morphological investigation revealed that the parasite belongs to Benedenia (Monogenea: Capsalidae). Benedenia akajin n. sp. is proposed here and described morphologically, based on the unique structures in the vaginal duct with a thick-walled distal one-third, the penis with a teat-shaped tip and the testes smaller than the germarium. A positive relationship between the lengths of three haptoral sclerites (anterior sclerites and anterior and posterior hamuli) and body length indicates that these taxonomically important structures keep growing as the parasite ages. Molecular analyses showed that the present species is most closely related to B. epinepheli and B. sargocentron , with the highest 28S rDNA identity of 98.1%, but no identical sequences were found in the database. Both morphological and molecular evidences suggest Benedenia akajin n. sp. as an undescribed species, and this new skin fluke deserves further investigations for the stable aquaculture of P. leopardus .","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"8 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88231600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Kurata, S. Miyashita, Shusei Toda, S. Wada, T. Sakai
{"title":"Immunohistochemistry for Detection of MHC Class II-Expressing Cells in Japanese Flounder Paralichthys olivaceus","authors":"O. Kurata, S. Miyashita, Shusei Toda, S. Wada, T. Sakai","doi":"10.3147/JSFP.55.151","DOIUrl":"https://doi.org/10.3147/JSFP.55.151","url":null,"abstract":"","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"39 1","pages":"151-161"},"PeriodicalIF":0.6,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79182008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Hydrogen Peroxide on Egg Laying and Hatching of the Skin Monogenean Neobenedenia girellae","authors":"N. Hirazawa, N. Umeda, Kousuke Akiyama","doi":"10.3147/jsfp.55.80","DOIUrl":"https://doi.org/10.3147/jsfp.55.80","url":null,"abstract":"","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"95 1","pages":"80-83"},"PeriodicalIF":0.6,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76857550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Heavy Metacercarial Infection in the Abdominal Cavity of Hatchery-reared Japanese Dace Tribolodon hakonensis","authors":"Norihiko Komatsu, N. Itoh, K. Ogawa","doi":"10.3147/jsfp.55.53","DOIUrl":"https://doi.org/10.3147/jsfp.55.53","url":null,"abstract":"","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"32 1","pages":"53-60"},"PeriodicalIF":0.6,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84684775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Koyama, Daiki Komatsu, Tsubasa Uchino, Yuki Midorikawa, G. Kato, T. Ishikawa, T. Nishimura, Korenori Takeda, H. Fukuda, S. Wada, M. Sano
{"title":"Development of New PCR and Quantitative PCR Protocols for the Detection of Plecoglossus altivelis Poxvirus-like Virus in Atypical Cellular Gill Disease of Ayu","authors":"T. Koyama, Daiki Komatsu, Tsubasa Uchino, Yuki Midorikawa, G. Kato, T. Ishikawa, T. Nishimura, Korenori Takeda, H. Fukuda, S. Wada, M. Sano","doi":"10.3147/jsfp.55.84","DOIUrl":"https://doi.org/10.3147/jsfp.55.84","url":null,"abstract":"","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"50 1","pages":"84-87"},"PeriodicalIF":0.6,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87075493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Mizuno, S. Urawa, Yoshitomo Katsumata, T. Morishita, Yui Minowa, M. Ban
{"title":"Quantitative Analysis of Diplomonad Flagellate Spironucleus salmonis Infection in Intestines of Hatchery and Wild Salmonid Fishes in Hokkaido","authors":"S. Mizuno, S. Urawa, Yoshitomo Katsumata, T. Morishita, Yui Minowa, M. Ban","doi":"10.3147/jsfp.55.61","DOIUrl":"https://doi.org/10.3147/jsfp.55.61","url":null,"abstract":"","PeriodicalId":51052,"journal":{"name":"Fish Pathology","volume":"23 1","pages":"61-70"},"PeriodicalIF":0.6,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88981051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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