A5084918851- Marine and fisheries research
- Fish Ecology and Management Studies
- Food Industry and Aquatic Biology
- Ichthyology and Marine Biology
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Identification and Quantification in Food
- Aquaculture Nutrition and Growth
- Cephalopods and Marine Biology
- Genetic diversity and population structure
- Fish Biology and Ecology Studies
- Oceanographic and Atmospheric Processes
- Aquatic life and conservation
- Marine Biology and Ecology Research
- Coral and Marine Ecosystems Studies
- Water Quality Monitoring Technologies
- Reproductive biology and impacts on aquatic species
- Physiological and biochemical adaptations
- Underwater Vehicles and Communication Systems
- Robotics and Sensor-Based Localization
- Advanced Image and Video Retrieval Techniques
- Marine and coastal plant biology
- Marine animal studies overview
- Crustacean biology and ecology
- Marine and coastal ecosystems
Japan Fisheries Research and Education Agency
2012-2024
National Fisheries Institute
2002-2015
Nation University
2005
A new species of softnose skate (Arhynchobatidae), Bathyraja sexoculata Misawa, Orlov, Orlova, Gordeev and Ishihara is described on the basis five specimens collected from off east coast Simushir Island, Kuril Islands, located in western North Pacific. The conformed to genus by having anteriormost pectoral-fin skeleton almost reaching snout tip, a slender unsegmented rostral cartilage. Within Bathyraja, belongs subgenus Arctoraja (currently with four valid species) due relatively short tail...
MEPS Marine Ecology Progress Series Contact the journal Facebook (Twitter) RSS Mailing List Receive regular lists of newly published articles via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 238:187-198 (2002) - doi:10.3354/meps238187 Diets walleye pollock Theragra chalcogramma in Doto area, northern Japan: ontogenetic and seasonal variations Orio Yamamura1,*, Satoshi Honda1, Osamu Shida2, Tomonori Hamatsu1 1Hokkaido National Fisheries Research Institute, 116 Katsurakoi,...
ABSTRACT Juvenile walleye pollock of the Japanese Pacific population were collected from Funka Bay [spawning ground; 16–64 mm fork length (FL)] in spring and Doto area (nursery 70–146 FL) summer. Hatch dates estimated by subtracting number otolith daily increments sampling dates, their early growth was back‐calculated using radius–somatic relationships. Interannual change hatching period observed during 2000–02, peaks ranged mid‐February 2000 to early‐April 2002. In 2000, when a strong year...
An annotated checklist of benthic fishes on the western part Kitami-Yamato Bank off northeastern Hokkaido, Japan in southern Sea Okhotsk, is presented based voucher specimens with accompanying color photographs.All material was collected late April, 2013 and 2014 by bottom trawl net, a total 450 being classified into 92 species representing 21 families.These include Bathyraja trachouros, first record from Careproctus segaliensis, only second confirmed species.
Recent studies have revealed the impact of drastic climate change during last glacial period on coastal marine and anadromous species in marginal seas northwestern Pacific Ocean; however, its influence deep-sea remains poorly understood. To compare effects populations from Sea Japan Okhotsk, we examined mitochondrial control region cytochrome b gene sequences Lycodes matsubarai, a deepsea demersal fish that inhabits these two seas. Our results showed clear genetic differentiation between The...
Abstract Abiotic and biotic factors affecting the recruitment variability of Japanese Pacific stock ( JPS ) walleye pollock T heragra chalcogramma were examined using a bivariate regression multivariate combined model. Of abiotic variables around F unka B ay (spawning ground), February sea surface temperature SST wind direction index showed significant relationships with recruitment. was positively related to recruitment, suggesting that warmer water in ebruary favors On other hand,...
Abstract We examined stock fecundity, abundance of eggs and larvae, catch per haul age 0 walleye pollock, Theragra chalcogramma , considered the relationship between reproduction, recruitment ocean environment off Pacific coast northern Japan for period 1985 1996. To calculate we estimated at maturity expanded estimates to expected composition population as by Virtual Population Analysis. Eggs larvae were collected research cruises in main spawning ground around Funka Bay. Catch number...
Expensive kichiji rockfish is important catch for fishers and decreas significantly by over fishing. Common investigation method the trawl fish difficult to survey on rough terrain need big support of ship. This paper proposes resource using autonomous underwater vehicle (AUV) Tuna-Sand, image processing precise measurement length. The AUV Tuna-Sand was developed material energy resources in deep-sea such, can observe natural seafloor automatically only mounted sensors devices. Our makes a...
Abstract Trace elements and stable isotope ratios in otoliths have been used as proxies for the migration history of teleosts; however, their application oceanic fishes remains limited. This study reports first use radiocarbons to evaluate horizontal histories an fish species, walleye pollock Gadus chalcogrammus . We conducted radiocarbon analyses three stocks sourced from Hokkaido, Japan. The concentrations outermost portion Japanese Pacific, Northern Japan Sea (JS), Southern Okhotsk (OS)...
Potential fecundity models of walleye or Alaska pollock Gadus chalcogrammus in the Pacific waters off Hokkaido, Japan, were developed. They compared using a generalized linear model with either standard body length ( L S ) total mass M T as main covariate along Fulton's condition factor K and mean diameter oocytes D O additional potential covariates to account for maternal conditions maturity stage. The results selection showed that was better single predictor F P than . biological...
We surveyed the biomass of valuable kichiji rockfish using hovering type AUV Tuna-Sand which developed for observation seafloor, in Kitami-Yamato bank northern ocean Japan at June 2013. The took about 5,300 photography seafloor over 24 hours. photograph had 37 rockfishes 90 mm to 340 long. Kichiji were taken several times by stayed on same attitude. TS_076 dive point 652 m depth most number and many brittle stars. TS_077 305 two fishes although observed broadest range all points. In TS_079...