A5077604388- Marine and coastal ecosystems
- Marine Toxins and Detection Methods
- Marine Bivalve and Aquaculture Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Protist diversity and phylogeny
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Environmental Toxicology and Ecotoxicology
- Algal biology and biofuel production
- Marine and fisheries research
- Marine Invertebrate Physiology and Ecology
- Aquatic Invertebrate Ecology and Behavior
- Aquaculture disease management and microbiota
- Hemoglobin structure and function
- Marine and coastal plant biology
- Oceanographic and Atmospheric Processes
- Diatoms and Algae Research
- Aquaculture Nutrition and Growth
- Animal Ecology and Behavior Studies
- Water Quality Monitoring Technologies
- Fish Ecology and Management Studies
- Physiological and biochemical adaptations
- Marine Ecology and Invasive Species
- Environmental DNA in Biodiversity Studies
- Coastal and Marine Management
Japan Fisheries Research and Education Agency
2010-2021
National Agriculture and Food Research Organization
1999-2005
National Institute of Oceanography and Fisheries
2000
National Fisheries Institute
1998
Kyushu University
1997
Kyoto University
1997
The effects of temperature, salinity and irradiance on the growth harmful red tide dinoflagellate Cochlodinium polykrikoides were examined in laboratory. From 60 different combinations temperature (10–30°C) (10–40) under saturated irradiance, C. exhibited its maximum specific rate 0.41 day−1 at a combination 25°C 34. Optimum rates >0.3 observed temperatures ranging from 21 to 26°C salinities 30 36. organism did not grow ≤10°C only grew >30 if was >15°C. It able 15 30°C 20 These values...
This is the first report to explore fine‐scale diversity, population genetic structure, and biogeography of a typical planktonic microbe in Japanese Korean coastal waters also try detect impact natural human‐assisted dispersals on structure gene flow toxic dinoflagellate species. Here we present analysis Alexandrium tamarense (Lebour) Balech populations from 10 sites along coasts. We used nine microsatellite loci, which varied widely number alleles diversity across populations. The revealed...
Growth responses of the red tide flagellates, Heterocapsa circularisquama (Dinophyceae) and Chattonella verruculosa (Raphidophyceae), were examined with 36 different combinations temperature (5–30°C) salinity (10–35 PSU). did not grow at or below a 10°C. The maximum growth rate H.circularisquama (1.3 divisions day−1) was obtained combination 30°C 30 PSU. In contrast, C. 10 PSU temperatures 25°C more. (1.74 15°C 25 A significant temperature-salinity interaction on found by factorial analysis....
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 146:73-80 (1997) - doi:10.3354/meps146073 Toxic effects of dinoflagellate Heterocapsa circularisquama on clearance rate blue mussel Mytilus galloprovincialis Matsuyama Y, Uchida T, Honjo T The (Peridiniales, Dinophyceae) were studied in laboratory clarify mechanism involved toxic dinoflagellates bivalve...
Raphidophycean flagellates, Chattonella marina and C. ovata, are harmful red tide phytoplankters; blooms of these phytoplankters often cause severe damage to fish farming. Previous studies have demonstrated that ovata continuously produce reactive oxygen species (ROS) such as superoxide anion (O2−) hydrogen peroxide (H2O2) under normal growth conditions, an ROS-mediated toxic mechanism against other marine organisms has been proposed. Although the exact ROS generation in still remains be...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 118:301-303 (1995) - doi:10.3354/meps118301 The red-tide dinoflagellate Heterocapsa sp. kills Gyrodinium instriatum by cell contact Uchida, T., Yamaguchi, M., Matsuyama, Y., Honjo, T. effects of on were studied using laboratory cultures. Growth G. was strongly suppressed when cultured together with...
Abstract The outbreak of paralytic shellfish poisoning caused by the toxic dinoflagellate Alexandrium catenella (Dinophyceae) is a worldwide concern from economic and food hygiene point view. To assess dispersal mechanism, population genetic study using highly polymorphic markers one crucial approaches. We isolated 12 microsatellites this species. These loci provide class variable marker as number alleles ranged three to estimate gene diversity was 0.248 0.897 across microsatellites; we...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 17:91-98 (1999) - doi:10.3354/ame017091 Grazing impacts of heterotrophic dinoflagellate Polykrikos kofoidii on a bloom Gymnodinium catenatum Yukihiko Matsuyama1,*, Masahide Miyamoto2, Yuichi Kotani1 1National Research Institute Fisheries and Environment Inland Sea, Maruishi, Ohno, Saeki, Hiroshima 739-0452, Japan...
Abstract Outbreaks of paralytic shellfish poisoning caused by the toxic dinoflagellate Alexandrium tamarense (Dinophyceae) are currently a serious problem from an economic and food hygiene point view throughout world. We isolated 13 polymorphic microsatellite loci this species. These provided markers with high polymorphism ranging four to 15 alleles per locus gene diversity between 0.632 0.974. The available for more detailed investigations genetic structure flow A. populations.
The identification and quantification of okadaic acid (OA)/dinophysistoxin (DTX) analogues pectenotoxins (PTXs) in Dinophysis samples collected from coastal locations around Japan were evaluated by liquid chromatography mass spectrometry. species identified analyzed included fortii, D. acuminata, mitra (Phalacroma mitra), norvegica, infundibulus, tripos, caudata, rotundata rotundatum), rudgei. dominant toxin found acuminata was PTX2 although some contained DTX1 as a minor toxin. specimens...
Heterocapsa circularisquama Horiguchi is lethal to shellfish, particularly bivalves such as pearl oysters ( Pinctada fucata Gould). No detrimental effects of this flagellate on fish have been observed thus far. In study, we found that H. causes mammalian erythrocytes lyse. Among the tested, rabbit showed highest susceptibility, whereas from cattle, sheep, and human were relatively insensitive. triquetra Stein, which morphologically similar but not toxic bivalves, no hemolytic activity toward...