A5100697397- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Marine Invertebrate Physiology and Ecology
- Crustacean biology and ecology
- Marine Toxins and Detection Methods
- Coral and Marine Ecosystems Studies
- Marine and fisheries research
- Water Resources and Management
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Parasite Biology and Host Interactions
- Coastal and Marine Management
- Flood Risk Assessment and Management
- Marine Ecology and Invasive Species
- Aquatic Ecosystems and Phytoplankton Dynamics
- Aquatic and Environmental Studies
- Microbial Community Ecology and Physiology
- Marine and environmental studies
- Environmental Toxicology and Ecotoxicology
- Precipitation Measurement and Analysis
- Groundwater and Isotope Geochemistry
- Flow Measurement and Analysis
- Marine Biology and Environmental Chemistry
- Oceanographic and Atmospheric Processes
- Microplastics and Plastic Pollution
Tokyo University of Marine Science and Technology
2012-2023
University of Kansas Medical Center
2008
Water Research Australia
1995
Lake Biwa Museum
1995
Perfluorooctanoic acid and perfluorodecanoic (PFDA) are commonly used as emulsifiers surfactants in fluoropolymer manufacturing known peroxisome proliferator–activated receptor alpha (PPARα) agonists. PPARα activation induces β- ω-oxidation enzymes such Cyp4a14 acyl-CoA oxidase, which a likely cause of subsequent oxidative stress proliferation. Conversely, NF-E2-related factor-2 (Nrf2) is transcription factor that protects against inflammation by regulating several detoxification xenobiotic...
Abstract. Marine particles of different nature are found throughout the global ocean. The term “marine particles” describes detritus aggregates and fecal pellets as well bacterioplankton, phytoplankton, zooplankton nekton. Here, we present a particle size distribution dataset obtained with several Underwater Vision Profiler 5 (UVP5) camera systems. Overall, within 64 µm to about 50 mm range covered by UVP5, detrital most abundant component all marine particles; thus, measurements UVP5 can...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 259:163-172 (2003) - doi:10.3354/meps259163 Species-specific house productivity of appendicularians Riki Sato1,2,*, Yuji Tanaka1, Takashi Ishimaru1 1Department Ocean Sciences, Tokyo University Fisheries, 4-5-7 Konan, Minato-ku, 108-8477, Japan 2Present address: Louisiana Universities Consortium, 8124 Highway...
Phyllosomas (planktonic larvae) of slipper lobsters cling onto and feed on jellyfish under both natural laboratory conditions. Ibacus novemdentatus are capable feeding various species including venomous stingers; however, the range supporting growth survival phyllosomas is unknown. Seventeen (12 for first five second trials) 18 (13 were fed exclusively Aurelia aurita Chrysaora pacifica, respectively. aurita-fed metamorphosed into nisto stage (postbenthic ∼54 days after hatching, whereas...
To estimate the productivity and grazing impact of a common appendicularian species Oikopleura dioica in Tokyo Bay, monthly observations on its abundance vertical distribution were conducted during 2000. The peaked February October, but was low summer. Seasonal fluctuations similar to those abundance, with maximum values 92, 134 508 mg C m−2 day−1 for somatic, new house discarded October 206 fecal pellet February, respectively. averaged biomass O. only 2.5% that copepods; however, secondary...
Biotic factors that affect phytoplankton physiology and behavior are not well characterized but probably play a crucial role in regulating their population dynamics nature. We document evidence some marine bacteria can decrease the swimming speed of motile through release putative protease(s). Using dinoflagellate Lingulodinium polyedrum (F. Stein) J. D. Dodge as model system, we showed motility‐reducing components bacterial‐algal cocultures were mostly heat labile, high molecular weight...
The phyllosoma, a larva of spiny and slipper lobsters, has an exceptionally flat body long appendages. It is known to associate with several species cnidarian jellyfish, behavior that not rare in crustaceans. Indeed, phyllosomas clinging onto jellyfish have been observed both the laboratory natural environment. Wild found contain tissues their hepatopancreas feces, suggesting larvae utilize as food source; however, how they capture what prefer rarely investigated. few previous studies...
クロマグロの卵発生を観察するとともに,発生速度,孵化所要時間および孵化率に及ぼす水温の影響を調べた。水温24℃における卵発生を観察した結果,卵は平均直径0.973±0.025mm(n=60)の分離浮性卵で,産卵直後から卵割期にいたる形状および各発生段階は一般硬骨魚と大差なく,産卵32時間後から孵化した。次に水温22℃から28℃の範囲に4区の水温区を設け,発生速度に及ぼす水温の影響を調べたところ,各発生段階への到達時間は水温が高いほど速く,高温区と低温区の各発生段階への到達の時間差は水温26.5℃以上で小さく,24℃以下で大きかった。16～33℃にわたる種,々の水温下で孵化所要時間と孵化率を調べた。孵化所要時間を対数として水温との関係を直線回帰して表したところ,25℃付近に直線の傾きの変曲点が認められた。桑実期から実験を開始して正常孵化仔魚が得られた水温範囲は19.9～31.5℃,50%以上の正常孵化率を示した水温範囲は21.2～29.8℃であった。また,最も正常孵化率が高く奇形率が低かった水温は25℃付近であった。これらの結果から,クロマグロの卵発生に最適な水温は25℃付近と考えられた。
To investigate the vertical zonation in copepod community relation to stratified water-masses, multi-layer sampling at 1–2-m intervals using a submersible pump was conducted on 6 August 2009 inner part of Tokyo Bay, central Japan. Acartia sinjiensis showed peak population density surface water, which influenced by river discharge, and Paracalanus parvus s.l. had contrastingly mid layer, intruded coastal water from out bay through estuary circulation. Calanus sinicus occurred layer with other...
Several species of harmful algal blooms (HAB) exert inimical effects on bivalve molluscs, with mass mortalities and pathologies reported worldwide. Information the HAB reproduction however, remains very limited. The Japanese pearl oyster Pinctada fucata martensii is an important economic cultured in Japan. In previous studies, dinoflagellates raphidophytes were shown to affect embryos larvae oyster. present study, quantitative deleterious Alexandrium catenella, affine, Heterosigma akashiwo,...
Jellyfish possess venomous cnidae on their tentacles to capture and consume marine zooplankton. Nevertheless, the planktonic larvae of smooth fan lobster (Ibacus novemdentatus), known as phyllosoma, prey jellyfish successfully ingest both tentacle tissue well constituent cnidae, despite presence venom-filled explosively penetrant or nematocysts. In present study, we hypothesized that phyllosomas have mechanical and/or physiological resistance internal envenomation by ingested To test this...
We present a new method for quantifying the feeding of individual copepods, using planar sheet laser light to stimulate fluorescence phytoplankton ingested by copepod. The is imaged with sensitive CCD camera, giving two‐dimensional images copepod's gut 20 × µm spatial resolution. Using tethered we have obtained > 3 h long time series copepod every 15–20 s. same can be used multiple experiments, obviating problems variability as source error. Initial data reveal two distinct patterns...