{"title":"A species-specific qPCR method to detect the giant jellyfish <i>Nemopilema nomurai</i> from environmental DNA","authors":"Misato Nakae, Junya Hirai, Toru Hasegawa, Akane Iida, Naoki Iguchi, Kay Sakuma","doi":"10.3800/pbr.20.226","DOIUrl":"https://doi.org/10.3800/pbr.20.226","url":null,"abstract":"The massive outbreaks of the giant jellyfish Nemopilema nomurai have caused serious problems in fisheries, and monitoring its distribution is necessary to predict its occurrence around Japan. In this study, we designed a primer/probe set of mitochondrial 16S for species-specific qPCR to detect N. nomurai. The utility of qPCR using environmental DNA (eDNA) was compared with conventional approaches (sight survey and net collection) in the Sea of Japan and the East China Sea in 2021–2023. The newly developed qPCR method showed an average 98.9% PCR efficiency (r2=0.9992). In the East China Sea, the highest copy numbers of the species were observed at stations using conventional methods to detect the maximum number of N. nomurai. The qPCR method also detected N. nomurai at stations that reported no observations using conventional methods in both sampling areas. Possible DNA degradation was observed in eDNA samples from the Sea of Japan in 2021, and the qPCR method detected N. nomurai at only a subset of the stations that reported the species using conventional methods. These results indicate that qPCR using eDNA can be an effective monitoring tool for N. nomurai; however, eDNA should be properly preserved and analyzed immediately to prevent its underestimation.","PeriodicalId":515348,"journal":{"name":"Plankton and Benthos Research","volume":"20 3","pages":"226-230"},"PeriodicalIF":0.0,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.jstage.jst.go.jp/article/pbr/20/3/20_P200301/_pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147898724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kohei Hamamoto, Akira Iguchi, Kodai Gibu, Hiroyuki Ozawa, Y. Fujita
{"title":"A discovery of the northernmost population of the giant mangrove whelk Terebralia palustris (Mollusca: Gastropoda: Potamididae) on Zamami Island and its genetic variability","authors":"Kohei Hamamoto, Akira Iguchi, Kodai Gibu, Hiroyuki Ozawa, Y. Fujita","doi":"10.3800/pbr.19.60","DOIUrl":"https://doi.org/10.3800/pbr.19.60","url":null,"abstract":"","PeriodicalId":515348,"journal":{"name":"Plankton and Benthos Research","volume":"64 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140418247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Koichi Yano, Yoshiki Takayama, Shinji Shimode, M. Toratani, Hiroshi Murakami, Victor S. Kuwahara
{"title":"Observation of a coccolithophore Gephyrocapsa oceanica bloom in the temperate coastal waters of Sagami Bay, Japan","authors":"Koichi Yano, Yoshiki Takayama, Shinji Shimode, M. Toratani, Hiroshi Murakami, Victor S. Kuwahara","doi":"10.3800/pbr.19.37","DOIUrl":"https://doi.org/10.3800/pbr.19.37","url":null,"abstract":"","PeriodicalId":515348,"journal":{"name":"Plankton and Benthos Research","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140422943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Nishi, Shinri Tomioka, Naoto Jimi, Yoshihiro Fujiwara, Elena K. Kupriyanova
{"title":"A new species of Amphictene (Annelida, Polychaeta, Pectinariidae) from off Kushiro, Hokkaido, Japan","authors":"E. Nishi, Shinri Tomioka, Naoto Jimi, Yoshihiro Fujiwara, Elena K. Kupriyanova","doi":"10.3800/pbr.19.51","DOIUrl":"https://doi.org/10.3800/pbr.19.51","url":null,"abstract":"","PeriodicalId":515348,"journal":{"name":"Plankton and Benthos Research","volume":"60 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140419717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takeshi Sonoda, Susumu Chiba, Tomoyasu Yamazaki, Takahiro Nobetsu, Hideaki Fujiya, Tomoyuki Komai, Noboru Nunomura, Michitaka Shimomura, Ko Tomikawa, K. Kakui, Takashi Hosono, Atsushi Ito, Toshihiko Fujita, Itaru Kobayashi, S. Goshima
{"title":"Marine macroinvertebrate fauna of the shallow coastal waters of the Shiretoko Peninsula, a World Natural Heritage at Hokkaido, Japan","authors":"Takeshi Sonoda, Susumu Chiba, Tomoyasu Yamazaki, Takahiro Nobetsu, Hideaki Fujiya, Tomoyuki Komai, Noboru Nunomura, Michitaka Shimomura, Ko Tomikawa, K. Kakui, Takashi Hosono, Atsushi Ito, Toshihiko Fujita, Itaru Kobayashi, S. Goshima","doi":"10.3800/pbr.19.1","DOIUrl":"https://doi.org/10.3800/pbr.19.1","url":null,"abstract":"","PeriodicalId":515348,"journal":{"name":"Plankton and Benthos Research","volume":"43 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140419240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mass recruitment of the lancelet Branchiostoma japonicum at a sandbank in the western Seto Inland Sea in 2002 and subsequent age structure of the population","authors":"Hiroshi Ueda, Kanako Sakaki, Hideyuki Kamakura","doi":"10.3800/pbr.19.17","DOIUrl":"https://doi.org/10.3800/pbr.19.17","url":null,"abstract":"","PeriodicalId":515348,"journal":{"name":"Plankton and Benthos Research","volume":"113 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140422409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Spatial and temporal variations in community structure, standing stock and productivity of mesozooplankton in the southwestern Japan Sea","authors":"Toru Kobari, Taiga Honma, Masafumi Kodama, Akinobu Kodama, Toshiteru Watanabe, Tetsutaro Takikawa","doi":"10.3800/pbr.19.26","DOIUrl":"https://doi.org/10.3800/pbr.19.26","url":null,"abstract":"","PeriodicalId":515348,"journal":{"name":"Plankton and Benthos Research","volume":"100 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140423734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}