A5001560491- Marine animal studies overview
- Marine and fisheries research
- Greenhouse Technology and Climate Control
- Arctic and Antarctic ice dynamics
- Smart Agriculture and AI
- Isotope Analysis in Ecology
- Leaf Properties and Growth Measurement
- Underwater Acoustics Research
- Cryospheric studies and observations
- Plant Physiology and Cultivation Studies
- Light effects on plants
- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Neural Networks and Applications
- Spectroscopy and Chemometric Analyses
- Marine Bivalve and Aquaculture Studies
- Marine and coastal plant biology
- Plant Disease Management Techniques
- Ocean Acidification Effects and Responses
- Geology and Paleoclimatology Research
- Fish Ecology and Management Studies
- Urban Heat Island Mitigation
- Coral and Marine Ecosystems Studies
- Magnetic and Electromagnetic Effects
- Marine Biology and Ecology Research
Tokyo University of Marine Science and Technology
2011-2025
Japan Fisheries Research and Education Agency
2011-2024
Australian Antarctic Division
2024
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
2024
All-Russian Research Institute Fisheries and Oceanography
2024
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2024
NOAA National Marine Fisheries Service Northeast Fisheries Science Center
2024
Hokkaido University
2011-2022
Technical University of Denmark
2021
Osaka Prefecture University
1999-2013
Abstract Murase, H., Nagashima, Yonezaki, S., Matsukura, R., and Kitakado, T. 2009. Application of a generalized additive model (GAM) to reveal relationships between environmental factors distributions pelagic fish krill: case study in Sendai Bay, Japan. – ICES Journal Marine Science, 66: 1417–1424. A was applied fishery-survey data the influences on distribution patterns Japanese anchovy (Engraulis japonicus), sand lance (Ammodytes personatus), krill (Euphausia pacifica). Echosounder...
Full-depth hydrographic sections of the BROKE experiment in 1996 (across Antarctic margin from 80 to 150°E; Bindoff et al., 2000) were revisited for first time during 2018/2019 austral summer. We describe subsurface physical oceanography 2019 and changes between not documented earlier studies. The survey captured decadal ocean structure southern flank Circumpolar Current (ACC) continental shelves. In five cross-slope meridional sections, where measurements are comparable (112, 120, 128, 140,...
Knowledge on the distribution of zooplankton in many unique habitats Southern Ocean is essential for understanding food web dynamics, assessing impacts environmental change and managing exploitation marine living resources. Variation may occur horizontal as well vertical plane, latter show a diel cycle (diel migration or DVM). Conventional sampling methods, including several types nets acoustics, often undersample ignore top 10 m water column. The surface waters may, however, host specific...
Abstract Ice mass loss in the Wilkes Land sector of East Antarctica and Amundsen Bellingshausen Sea sectors West has contributed to a rise sea levels over several decades. The massive continental ice behind Totten Shelf, equivalent few meters sea-level rise, is grounded well below level therefore, potentially vulnerable oceanic heat. Here, we present analyses comprehensive hydrographic observations at slope shelf break regions off Shelf. We provide robust evidence that relatively warm...
ABSTRACT Using a noninvasive DNA methylation (DNAm)–based age estimation method, we investigate the structure of humpback whales that newly emerged around Hachijojima Island, Tokyo Metropolis, Japan to uncover role this area for species. We measured DNAm frequencies at three age‐related genes ( GRIA2 , CDKN2A, and TET2 ) from 26 biopsy skin samples 21 unique (15 males 6 females) randomly collected in winters 2018–2021 estimated their ages using known model whales. The individuals were...
The East Antarctic krill fisheries are spread across two Divisions of the Commission for Conservation Marine Living Resources (CCAMLR), Division 58.4.1 between 80-150°E and 58.4.2 30-80°E. Each these is further divided into West subregions with separate catch limits. In 2019, CCAMLR agreed to a revised fishery management strategy recommended by Scientific Committee. This consists setting limits Euphausia superba using three combined approaches; 1) an acoustic biomass estimate, 2)...
Abstract The spatial distribution of Antarctic minke whales in the Ross Sea with relation to distributions their prey – krill was investigated this study using generalized additive models ( GAM s). Spatial two species (ice and krill) were estimated by s. Three abiotic factors distance from continental shelf break (800 m isobaths), mean temperature salinity surface 200 MTEM ‐200 MSAL ‐200), latitude longitude used as covariates for krill. Estimated then other model whales. In selected whales,...
Abstract The Antarctic continental margin supplies the densest bottom water to global abyss. From late twentieth century, an acceleration in long-term freshening of Bottom Waters (AABW) has been detected Australian-Antarctic Basin. Our latest hydrographic observations reveal that, 2010s, trend reversed broadly over slope. Near-bottom salinities 2018–2019 were higher than during 2011–2015. Along 170° E, salinity increase between 2011 and 2018 was greater that observed west. layer thickness...
Small pelagic fish (SPF) are important forage species and a target of major fisheries within diverse ecosystems. SPF critical link between plankton higher trophic levels. Understanding the network dependencies among supported by is required for effective resource management assessment risks posed environmental anthropogenic stressors. Food-web models represent synthesis knowledge these platform evaluating consequences change in productivity. From Ecopath food-web archived EcoBase...
Abstract A study of common minke and Bryde's whales was conducted in the western North Pacific 2000 2001 summer seasons to estimate prey selection cetaceans as this is an important parameter ecosystem models. Whale sighting sampling surveys using quantitative echosounder mid‐water trawl were carried out concurrently study. Biomasses Japanese anchovy, walleye pollock krill, which major species whales, estimated echosounder. The results suggested that whale showed for anchovy while they seemed...
The paper presents findings of agriculture research conducted in Japan three areas: 1) artificial intelligence applications and the environments: 2) intelligent environment control for plant production systems; 3) robots agriculture. latest biosystem derived algorithms are discussed. A finite element inverse technique using a photosynthesis algorithm is described, following by comparison neural network (NN) training photosynthetic versus genetic (GA). Leaf cellular automata introduced, their...
Antarctic krill ( Euphausia superba ) is a harvested species that has an important role in the Southern Ocean food web. Knowledge on demography of necessary for better understanding distribution life stages and their relation with predator species. In addition, such information essential fisheries management by CCAMLR (Commission Conservation Marine Living Resources). A large part Indian sector understudied large-scale surveys this region are scarce. Therefore, survey was carried out during...
Abstract The acoustic characteristics of biological backscattering in the western North Pacific were studied to verify expert knowledge on species composition echosigns. survey was conducted Kuroshio‐Oyashio inter‐frontal zone and subarctic waters April 2003. backscatterings identified by using midwater trawl, Isaacs‐Kidd trawl Bongo net. differences mean volume strengths between 120 38 kHz (ΔMVBS 120−38 ) calculated for backscatterings. Six types classified based results net samples ΔMVBS ....