{"title":"Phylogeny of the medaka","authors":"M. Sakaizumi","doi":"10.11403/JSET.19.19","DOIUrl":"https://doi.org/10.11403/JSET.19.19","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"24 1","pages":"19-24"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82288194","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}
Y. Shimasaki, M. Tsuyama, Rumana Tasmin, Mst Ruhina Margia Khanam, Xuchun Qiu, Y. Oshima
− 1 − ABSTRACT We investigated the growth and chlorophyll-related parameters of the marine diatom Skeletonema marinoi-dohrnii complex (NIES-324) exposed to tributyltin (TBT) or photosystem (PS) II inhibitor Irgarol as a reference chemical for elucidating the effect of TBT on photosynthetic activity. Fifty percent effective concentrations for growth (EC50) were 2.14 μg/L in TBT and 1.14 μg/L in Irgarol. Chlorophyll a content per one cell (pg/cell) was significantly decreased at the highest Irgarol concentration (1.0 μg/L) but chlorophyll c content was not affected. Following TBT treatment, however, both chlorophyll a and c content per cell increased significantly at the highest concentration (2.0 μg/L). The ratio of chlorophyll a and c content (chl. a/c ratio) decreased significantly and the minimum level of chlorophyll fluorescence (Fo) per μg/ mL of chlorophyll a (Fo/chl. a) increased significantly in all Irgarol treatment groups, but TBT had no effect on either parameter. The present results suggest that TBT has no direct effect on electron flow in the photosystem and that the chl. a/c ratio and Fo/chl. a are sensitive bio-markers for detecting the effect of the PSII inhibitor in diatoms.
{"title":"Comparative study of toxicological responses of chlorophyllrelated parameters in the marine diatom Skeletonema sp. exposed to tributyltin and Irgarol","authors":"Y. Shimasaki, M. Tsuyama, Rumana Tasmin, Mst Ruhina Margia Khanam, Xuchun Qiu, Y. Oshima","doi":"10.11403/JSET.18.1","DOIUrl":"https://doi.org/10.11403/JSET.18.1","url":null,"abstract":"− 1 − ABSTRACT We investigated the growth and chlorophyll-related parameters of the marine diatom Skeletonema marinoi-dohrnii complex (NIES-324) exposed to tributyltin (TBT) or photosystem (PS) II inhibitor Irgarol as a reference chemical for elucidating the effect of TBT on photosynthetic activity. Fifty percent effective concentrations for growth (EC50) were 2.14 μg/L in TBT and 1.14 μg/L in Irgarol. Chlorophyll a content per one cell (pg/cell) was significantly decreased at the highest Irgarol concentration (1.0 μg/L) but chlorophyll c content was not affected. Following TBT treatment, however, both chlorophyll a and c content per cell increased significantly at the highest concentration (2.0 μg/L). The ratio of chlorophyll a and c content (chl. a/c ratio) decreased significantly and the minimum level of chlorophyll fluorescence (Fo) per μg/ mL of chlorophyll a (Fo/chl. a) increased significantly in all Irgarol treatment groups, but TBT had no effect on either parameter. The present results suggest that TBT has no direct effect on electron flow in the photosystem and that the chl. a/c ratio and Fo/chl. a are sensitive bio-markers for detecting the effect of the PSII inhibitor in diatoms.","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"22 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84308613","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}
K. Ito, S. Uno, Hiroyuki Tanaka, S. Miki, E. Kokushi, M. Yamamoto, J. Koyama, Nathaniel C. A ñasco
− 11 − ABSTRACT To compare the distributions of polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs (alkPAHs) in sessile marine organisms, bivalves were collected from 20 sites along the coastal areas of Osaka Bay in Japan. Both PAHs and alkPAHs in bivalve tissues were determined by GC/MS. Total PAHs (∑PAHs) were 87.3-361, 212214 and 70.9-351 ng/g dry weight (dw) in blue mussels, green mussels and oysters, respectively. Meanwhile, total alkPAHs (∑alkPAHs) were 466-3293, 950-1788 and 2862787 ng/g dw in blue mussels, green mussels and oysters, respectively. When compared to their reported concentrations in sediments, ∑PAH were much lower while ∑alkPAH were higher in bivalves. Moreover, ∑alkPAHs in bivalves of each samling site were 1.89.8 times higher than ∑PAHs although ∑alkPAHs in sediment of each sampling site were 1.2-4.5 times lower than ∑PAHs. On the other hand, of the PAHs, naphthalene showed the highest concentration in bivalves for most of the sampling sites. Fortunately, benzo(a)pyrene and PAH4 concentrations in bivalves from Osaka Bay were within the EU criteria. For individual alkPAHs in bivalves, the naphthalene, dibenzothiophene, and phenanthrene/anthracene groups were accumulated at relatively high concentrations. These results suggest that the low molecular weight alkPAHs have higher tendency to pollute water columns.
{"title":"Distribution of Parent and Alkylated PAHs in Bivalves Collected from Osaka Bay, Japan","authors":"K. Ito, S. Uno, Hiroyuki Tanaka, S. Miki, E. Kokushi, M. Yamamoto, J. Koyama, Nathaniel C. A ñasco","doi":"10.11403/JSET.18.11","DOIUrl":"https://doi.org/10.11403/JSET.18.11","url":null,"abstract":"− 11 − ABSTRACT To compare the distributions of polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs (alkPAHs) in sessile marine organisms, bivalves were collected from 20 sites along the coastal areas of Osaka Bay in Japan. Both PAHs and alkPAHs in bivalve tissues were determined by GC/MS. Total PAHs (∑PAHs) were 87.3-361, 212214 and 70.9-351 ng/g dry weight (dw) in blue mussels, green mussels and oysters, respectively. Meanwhile, total alkPAHs (∑alkPAHs) were 466-3293, 950-1788 and 2862787 ng/g dw in blue mussels, green mussels and oysters, respectively. When compared to their reported concentrations in sediments, ∑PAH were much lower while ∑alkPAH were higher in bivalves. Moreover, ∑alkPAHs in bivalves of each samling site were 1.89.8 times higher than ∑PAHs although ∑alkPAHs in sediment of each sampling site were 1.2-4.5 times lower than ∑PAHs. On the other hand, of the PAHs, naphthalene showed the highest concentration in bivalves for most of the sampling sites. Fortunately, benzo(a)pyrene and PAH4 concentrations in bivalves from Osaka Bay were within the EU criteria. For individual alkPAHs in bivalves, the naphthalene, dibenzothiophene, and phenanthrene/anthracene groups were accumulated at relatively high concentrations. These results suggest that the low molecular weight alkPAHs have higher tendency to pollute water columns.","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"38 1","pages":"11-24"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85365195","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}
− 19 − ABSTRACT The toxicological effects of river water on the reproduction of the water f lea Daphnia magna were assessed with the standard 21-d chronic test(OECD TG211)at four river sites(St. 1–4)in rural districts of the Kanto Plain(Ibaraki Prefecture, Japan) at monthly intervals from April 2007 to March 2010. Over the 3 years, we recorded the following average numbers of live D. magna offspring after the 21-d tests: 17–233, 14–223, 29–210, and 84–209 in St. 1, 2, 3, and 4, respectively. The average numbers in August 2007, May and September 2008, and April 2009 at St. 1; August 2007 and May 2008 at St. 2, and June 2007 and April 2009 at St. 3 were significantly lower than those of the control(ANOVA, P < 0.01). The results of the above tests suggest that D. magna may be affected not only by the overall pesticide toxicity in the river water, but also by other factors that were not clarified in the present study. In addition, significant positive correlations were observed at each site between the body length of D. magna and the total number of offspring at 7 d(r = 0.783), 14 d(r = 0.772), and 21 d(r = 0.931)after the test began on 10 May 2008. These findings suggest that the body length of D. magna might be used to evaluate the toxicological effects of river water, even at 7 d, by using the standard chronic toxicity test.
{"title":"Chronic Toxicity Tests with Daphnia magna for the Examination of River Water Quality","authors":"M. Tada, Yutaka Ogamino","doi":"10.11403/JSET.17.19","DOIUrl":"https://doi.org/10.11403/JSET.17.19","url":null,"abstract":"− 19 − ABSTRACT The toxicological effects of river water on the reproduction of the water f lea Daphnia magna were assessed with the standard 21-d chronic test(OECD TG211)at four river sites(St. 1–4)in rural districts of the Kanto Plain(Ibaraki Prefecture, Japan) at monthly intervals from April 2007 to March 2010. Over the 3 years, we recorded the following average numbers of live D. magna offspring after the 21-d tests: 17–233, 14–223, 29–210, and 84–209 in St. 1, 2, 3, and 4, respectively. The average numbers in August 2007, May and September 2008, and April 2009 at St. 1; August 2007 and May 2008 at St. 2, and June 2007 and April 2009 at St. 3 were significantly lower than those of the control(ANOVA, P < 0.01). The results of the above tests suggest that D. magna may be affected not only by the overall pesticide toxicity in the river water, but also by other factors that were not clarified in the present study. In addition, significant positive correlations were observed at each site between the body length of D. magna and the total number of offspring at 7 d(r = 0.783), 14 d(r = 0.772), and 21 d(r = 0.931)after the test began on 10 May 2008. These findings suggest that the body length of D. magna might be used to evaluate the toxicological effects of river water, even at 7 d, by using the standard chronic toxicity test.","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"46 1","pages":"19-31"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89948642","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}
Rumana Tasmin, Y. Shimasaki, Xuchun Qiu, Masato Honda, M. Tsuyama, N. Yamada, S. Fukuda, Y. Oshima
Effects of the widely used herbicide diuron on growth of the freshwater green alga, Pseudokirchneriella subcapitata , were investigated in C medium with different nitrate （ 15, 150 or 1501 µM ） or phosphate （ 1.6, 16.3 or 163 µM ） levels at three water temperatures （ 10, 20 and 30 ℃ ） for 144 h. Growth was inhibited by 16 µg L –1 diuron in all cases. Results from generalized linear model （ GLM ） analysis showed that the growth inhibition rate by diuron treatment was significantly decreased by increased temperature and decreased nutrient levels. Our result indicated that diuron toxicity may decrease under conditions of high temperature and low nutrients. Therefore, nutrient levels at different water temperatures should be considered in risk assessments to learn the actual impact of diuron in real environmental conditions.
在不同硝酸盐(15、150或1501µM)或磷酸盐(1.6、16.3或163µM)水平的C培养基中，在3种水温(10、20和30℃)下，研究了广泛使用的除草剂diuron对淡水绿藻Pseudokirchneriella subcapitata生长144 h的影响。所有情况下，16µg L -1 diuron均能抑制生长。广义线性模型(GLM)分析结果表明，温度升高和营养水平降低显著降低了diuron处理的生长抑制率。结果表明，在高温和低营养条件下，迪乌隆的毒性可能会降低。因此，在风险评估中应考虑不同水温下的营养水平，以了解在实际环境条件下的实际影响。
{"title":"Elevated temperatures and low nutrients decrease the toxicity of diuron for growth of the green alga Pseudokirchneriella subcapitata","authors":"Rumana Tasmin, Y. Shimasaki, Xuchun Qiu, Masato Honda, M. Tsuyama, N. Yamada, S. Fukuda, Y. Oshima","doi":"10.11403/JSET.17.1","DOIUrl":"https://doi.org/10.11403/JSET.17.1","url":null,"abstract":"Effects of the widely used herbicide diuron on growth of the freshwater green alga, Pseudokirchneriella subcapitata , were investigated in C medium with different nitrate （ 15, 150 or 1501 µM ） or phosphate （ 1.6, 16.3 or 163 µM ） levels at three water temperatures （ 10, 20 and 30 ℃ ） for 144 h. Growth was inhibited by 16 µg L –1 diuron in all cases. Results from generalized linear model （ GLM ） analysis showed that the growth inhibition rate by diuron treatment was significantly decreased by increased temperature and decreased nutrient levels. Our result indicated that diuron toxicity may decrease under conditions of high temperature and low nutrients. Therefore, nutrient levels at different water temperatures should be considered in risk assessments to learn the actual impact of diuron in real environmental conditions.","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"84 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75313949","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}
M. Kikuchi, Hiroki Onodera, A. Sato, Ken Goto, Kazue Kato, J. Sawai
{"title":"Toxic effects of several heavy metal ions and their pyrithione complexes on Daphnia magna embryos","authors":"M. Kikuchi, Hiroki Onodera, A. Sato, Ken Goto, Kazue Kato, J. Sawai","doi":"10.11403/JSET.17.33","DOIUrl":"https://doi.org/10.11403/JSET.17.33","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"289 1","pages":"33-40"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72773533","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}
Akinari Shimazaki, Masato Honda, T. Akasaka, Akemi Muta, Yoko Kato-Unoki, N. Okino, Y. Shimasaki, Y. Oshima
{"title":"Identification of Perfluorooctane Sulfonate Binding Protein in Plasma of Rat","authors":"Akinari Shimazaki, Masato Honda, T. Akasaka, Akemi Muta, Yoko Kato-Unoki, N. Okino, Y. Shimasaki, Y. Oshima","doi":"10.11403/JSET.17.11","DOIUrl":"https://doi.org/10.11403/JSET.17.11","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"18 1","pages":"11-17"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83741529","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}
H. Yokota, A. Yamashita, Mai Uenokatsu, K. Tsujimura, E. Nakano, Sayaka Eguchi
{"title":"Effect of butylparaben on the reproduction of medaka （Oryzias latipes）","authors":"H. Yokota, A. Yamashita, Mai Uenokatsu, K. Tsujimura, E. Nakano, Sayaka Eguchi","doi":"10.11403/JSET.16","DOIUrl":"https://doi.org/10.11403/JSET.16","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"89 1","pages":"107-116"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79566666","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. Bacolod, S. Uno, Hiroyuki Tanaka, S. Miki, E. Kokushi, M. Fukunaga, J. Koyama
91 ABSTRACT Studies on the accumulation of waterborne nitrated polycyclic aromatic hydrocarbons (NPAHs), commonly known as nitroarenes, by fish are not well known. In this study, bioconcentration of NPAHs by marbled flounder, Pleuronectes yokohamae exposed to a mixture of six NPAHs was investigated in a continuous flow-through system for a period of seven days exposure followed immediately with seven days elimination. P. yokohamae is one of commercially important fish in Japan and is known to accumulate pollutants. Results show that NPAHs steady-state conditions were established from day 1 to 4 of exposure. Estimated bioconcentration factors(BCFs)ranged from 4 to 422 with 6-nitrochrysene and 2-nitrofluorene having the lowest and highest BCFs, respectively. Half-lives were from 0.96 to 5.59 days with 2-nitroflourene and 6-nitrochrysene being the shortest and the longest, respectively. The present study showed that waterborne NPAHs were accumulated by marbled flounder but the BCFs were lower than reported values of their parent PAHs. Furthermore, the difference in BCFs between NPAHs and PAHs could be attributed to the biotransformation processes and steric hindrance of these compounds.
{"title":"Bioconcentration of Waterborne Nitroarenes in Marbled Flounder Pleuronectes yokohamae","authors":"E. Bacolod, S. Uno, Hiroyuki Tanaka, S. Miki, E. Kokushi, M. Fukunaga, J. Koyama","doi":"10.11403/JSET.16.91","DOIUrl":"https://doi.org/10.11403/JSET.16.91","url":null,"abstract":"91 ABSTRACT Studies on the accumulation of waterborne nitrated polycyclic aromatic hydrocarbons (NPAHs), commonly known as nitroarenes, by fish are not well known. In this study, bioconcentration of NPAHs by marbled flounder, Pleuronectes yokohamae exposed to a mixture of six NPAHs was investigated in a continuous flow-through system for a period of seven days exposure followed immediately with seven days elimination. P. yokohamae is one of commercially important fish in Japan and is known to accumulate pollutants. Results show that NPAHs steady-state conditions were established from day 1 to 4 of exposure. Estimated bioconcentration factors(BCFs)ranged from 4 to 422 with 6-nitrochrysene and 2-nitrofluorene having the lowest and highest BCFs, respectively. Half-lives were from 0.96 to 5.59 days with 2-nitroflourene and 6-nitrochrysene being the shortest and the longest, respectively. The present study showed that waterborne NPAHs were accumulated by marbled flounder but the BCFs were lower than reported values of their parent PAHs. Furthermore, the difference in BCFs between NPAHs and PAHs could be attributed to the biotransformation processes and steric hindrance of these compounds.","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"99 1","pages":"91-105"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85913007","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":"Micronuclei and other nuclear abnormalities induction in erythrocytes of marbled flounder, Pleuronectes yokohamae, exposed to dietary nitrated polycyclic aromatic hydrocarbons","authors":"E. Bacolod, S. Uno, Hiroyuki Tanaka, J. Koyama","doi":"10.11403/JSET.16.79","DOIUrl":"https://doi.org/10.11403/JSET.16.79","url":null,"abstract":"","PeriodicalId":14585,"journal":{"name":"Japanese journal of environmental toxicology","volume":"1 1","pages":"79-89"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89276875","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}
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