Japanese Journal of Limnology最新文献_第8页

A new record of host fish Gymnogobius sp. for glochidia of Pronodularia japanensis , and the availability of host species for the mussel at three paddy field ditches in the Kanto area of Central Japan 日本中部关东地区3个水田沟渠中日本原螺旋藻glochidia寄主鱼Gymnogobius sp.的新记录及贻贝寄主种类的可得性

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.77.281

T. Itoh, Y. Saitoh, Y. Satoh, Kazuo Ito

{"title":"A new record of host fish Gymnogobius sp. for glochidia of Pronodularia japanensis , and the availability of host species for the mussel at three paddy field ditches in the Kanto area of Central Japan","authors":"T. Itoh, Y. Saitoh, Y. Satoh, Kazuo Ito","doi":"10.3739/RIKUSUI.77.281","DOIUrl":"https://doi.org/10.3739/RIKUSUI.77.281","url":null,"abstract":"A new record of host fish Gymnogobius sp. for glochidia of Pronodularia japanensis , and the availability of host species for the mussel at three paddy field ditches in the Kanto area of Central Japan Abstract This study investigates the availability of host species for glochidia of the unionid mussel Pronodularia japanensis at three paddy ﬁeld ditches of Kyu-Sasagawa River ( Fujioka City, Gunma Prefecture ) , Okanogouyousui ditch ( Fujioka City, Gunma Prefecture ) , and Nagarakuyousui ditch ( Kawajima Town, Saitama Prefecture ) in the Kanto area in Central Japan. The number of glochidia that infected the ﬁshes, the sites infected, and the glochidial encystment rate were determined using formalin-fixed specimens collected from each ditch. Chestnut gobies, Gymnogobius sp., that were infected with glochidia collected from the Okanogouyousui ditch were cultured in a tank ( 6 L, 24–27 ℃ ) for 10 days to study the appearance of the juvenile detached from the ﬁsh body. The major host species of glochidia was different in each study area. At Kyu-Sasagawa River and Okanogouyousui ditch, the glochidia were parasitic on only a few species such as Misgurnus anguillicaudatus and Opsariichthys platypus . At Nagarakuyousui ditch, the glochidia were parasitic on several ﬁsh species, such as Op. platypus, Oryzias sp., Rhinogobius sp., and Cyprinus carpio . Of three juveniles detached from the gobies, one survived in a test tube ( 30 mL ) for over 62 days at 21 ℃ . Gymnogobius sp. was identiﬁed as a suitable new host for the glochidia of P. japanensis .","PeriodicalId":35602,"journal":{"name":"Japanese Journal of Limnology","volume":"77 1","pages":"281-291"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69925897","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}

引用次数: 2

Morphospecies does not match DNA barcoding results in a some common Japanese chironomid species 形态种与DNA条形码结果不匹配

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.78.27

R. Ueno, K. Takamura, N. Kondo, S. Okuda, Kako Ohbayashi

引用次数: 0

Assessment of error in sediment core sampling in lakes using radiocesium derived from the Fukushima Nuclear Accident 利用福岛核事故放射性元素对湖泊沉积物岩心取样误差的评估

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.78.67

Arai Hiroyuki, Fukushima Takehiko, O. Yuichi

引用次数: 3

Genetic relationships of 33 genera of the subfamily Orthocladiinae in Japan 标题日本正枝亚科33属的亲缘关系

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.78.45

K. Kawai, H. Saito, Takuma Anno

引用次数: 0

Salinity tolerance of six adults ( Inversiunio jokohamensis , Hyriopsis schlegeli , Pronodularia japanensis , Cristaria plicata , Cristaria tenuis , and Sinanodonta sp.) and two glochidia ( Cristaria plicata and Cristaria tenuis ) of unionid mussels 6种成年贻贝(jokohamenis、schlegeli、Pronodularia japanensis、Cristaria plicata、Cristaria tenuis和Sinanodonta sp.)和2种舌化贻贝(Cristaria plicata和Cristaria tenuis)的耐盐性

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.78.87

T. Itoh, W. Kakino, Tadashi Kitano, H. Kohno

{"title":"Salinity tolerance of six adults ( Inversiunio jokohamensis , Hyriopsis schlegeli , Pronodularia japanensis , Cristaria plicata , Cristaria tenuis , and Sinanodonta sp.) and two glochidia ( Cristaria plicata and Cristaria tenuis ) of unionid mussels","authors":"T. Itoh, W. Kakino, Tadashi Kitano, H. Kohno","doi":"10.3739/RIKUSUI.78.87","DOIUrl":"https://doi.org/10.3739/RIKUSUI.78.87","url":null,"abstract":"The salinity tolerance of freshwater unionid mussels species Inversiunio jokohamensis, Hyriopsis schlegeli, Pronodularia japanensis, Cristaria plicata, C. tenuis , and Sinanodonta sp. reared in tanks was investigated. For adult mussels, the water in the tanks was adjusted to various brackish water salinity levels ( 3, 6, 10, and 12 psu ) . All adult individuals of I. jokohamensis died at salinities above 6 psu. When the salinity was gradually raised from 3-6 to 6-8 psu, almost all adult individuals of I. jokohamensis, H. schlegeli, C. tenuis , and Sinanodonta sp. died, but those of P. japanensis and C. plicata survived. When the salinity was raised from 8 to 10 psu, all adult individuals died. On the other hand, when the salinity levels in tanks were raised from 0-3 to 11-33 psu and lowered from 11-33 to 0 psu until the juveniles fell off from the host ( 186-236 h ) , several glochidia of C. plicata and C. tenuis on the host ﬁsh survived and metamorphosed. Thus, the results of the present study show that adult mussels cannot survive in brackish water above salinity levels of 6-8 psu; however, glochidia on a host can survive at high salinities. We also considered the possibility of migration of mussels to other geographical areas via brackish water or the sea.","PeriodicalId":35602,"journal":{"name":"Japanese Journal of Limnology","volume":"78 1","pages":"87-96"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69927073","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}

引用次数: 1

The importance of TOC as an indicator of organic compounds in public waters TOC作为公共水域有机化合物指标的重要性

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.78.59

S. Sato, Y. Saga, Toshiaki Esumi, Y. Nojiri, Y. Saki, Kenji Kato, Shogo Sugahara, H. Kamiya

{"title":"The importance of TOC as an indicator of organic compounds in public waters","authors":"S. Sato, Y. Saga, Toshiaki Esumi, Y. Nojiri, Y. Saki, Kenji Kato, Shogo Sugahara, H. Kamiya","doi":"10.3739/RIKUSUI.78.59","DOIUrl":"https://doi.org/10.3739/RIKUSUI.78.59","url":null,"abstract":"COD ( Mn ) is used as an indicator of organic compounds in public waters. Analytical methods for evaluating COD ( Mn ) are simple but entail several problems, such as oxidation rate, and are therefore doubted as appropriate indicators of organic compounds in public waters. In this research, we prepared various aqueous solutions of saccharides and/or amino acids and measured COD and TOC simultaneously. The measured values of TOC were close to the theoretical value for both compounds, and almost all organic carbons in each solution were detectable by TOC equipment. On the other hand, the COD oxidation rate in both the saccharide and amino acid solutions decreased according to the increase in the solutions ’ concentration, and there were also signiﬁcant differences in the decomposition rate in each compound. The relationship between ﬁeld data on COD and TOC in Shinji and Nakaumi lakes may be approximated by a quadratic expression, but the approximated curve did not pass the original point. This result indicates that there are some organic compounds that can be decomposed by TOC equipment but not by COD analytical methods, and the decomposition of COD was insufﬁcient in high concentrations in environmental water. Therefore, we consider COD not to be an appropriate indicator of the organic compounds in public waters; instead, TOC should be used.","PeriodicalId":35602,"journal":{"name":"Japanese Journal of Limnology","volume":"78 1","pages":"59-65"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3739/RIKUSUI.78.59","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69927255","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}

引用次数: 1

Reduction of nutrient loads to Lake Shinji by flood control channel 通过防洪通道减少真嗣湖的养分负荷

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.77.315

Shogo Sugahara, H. Kamiya, Toshiaki Esumi, Y. Tabayashi, Y. Seike

引用次数: 0

Comparison of DNA extraction methods for DNA barcoding of non-biting midges 非蠓类DNA条形码提取方法的比较

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.78.13

N. Kondo, S. Okuda, Kako Ohbayashi, R. Ueno, K. Takamura

{"title":"Comparison of DNA extraction methods for DNA barcoding of non-biting midges","authors":"N. Kondo, S. Okuda, Kako Ohbayashi, R. Ueno, K. Takamura","doi":"10.3739/RIKUSUI.78.13","DOIUrl":"https://doi.org/10.3739/RIKUSUI.78.13","url":null,"abstract":"The insect group Chironomidae is used as an environmental indicator for freshwater ecosystems because of its wide distribution and species richness. The morphological identification of chironomids requires expert skill; to this end, the application of DNA barcoding for species identification is a powerful tool. We applied DNA barcoding to chironomid specimens using different preservative conditions and several protocols for extraction and sequencing of DNA and found that the success of sequencing was affected by the condition of specimens and protocols applied. Purification using a silica-membrane filter yielded significantly high DNA quality and was deemed suitable for both old and valuable specimens. On the other hand, rough extraction without any purification and extraction without membrane filters both achieved sufficient DNA quality and sequencing success rates to be applied to wellpreserved and large specimens. For old or air-dried samples, however, rough extraction requires great care because it significantly reduces the efficiency of sequencing. DNA extracted from old or poorly preserved specimens tended to be fragmented and was not successfully sequenced, but using alternative PCR primers targeting a shorter region can improve the success rate. Dried wing specimens on prepared slides and pupal exuviae collected from the water surface were also subjected to DNA extraction and subsequent sequencing, which achieved 18.0% and 41.7% success rates, respectively. Such success rates may be insufficient for some purposes of DNA barcoding, but match particular objectives, for example, a field study with less work by collecting exuviae.","PeriodicalId":35602,"journal":{"name":"Japanese Journal of Limnology","volume":"78 1","pages":"13-26"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69926672","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}

引用次数: 0

DNA-sequence-based species delimitation for larval chironomid samples collected from Japanese farm ponds 日本农场池塘蠓幼虫的dna序列分类

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.78.35

K. Takamura, R. Ueno, N. Kondo, Kako Ohbayashi

引用次数: 1

Inland water fishes in the Ryukyu Islands: intriguing questions 琉球群岛的内河鱼类:有趣的问题

Japanese Journal of Limnology Pub Date : 2016-01-01 DOI: 10.3739/RIKUSUI.77.211

M. Nishida

引用次数: 0