A5050206419- Fish Ecology and Management Studies
- Reproductive biology and impacts on aquatic species
- Physiological and biochemical adaptations
- Aquaculture Nutrition and Growth
- Marine and fisheries research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Genetics, Aging, and Longevity in Model Organisms
- Environmental Toxicology and Ecotoxicology
- Identification and Quantification in Food
- Fish Biology and Ecology Studies
- Spaceflight effects on biology
- Marine Bivalve and Aquaculture Studies
- Heat shock proteins research
- Genetic diversity and population structure
- Ichthyology and Marine Biology
- Isotope Analysis in Ecology
- Aquaculture disease management and microbiota
- Invertebrate Immune Response Mechanisms
- Aquatic Invertebrate Ecology and Behavior
- Geology and Paleoclimatology Research
- Biocrusts and Microbial Ecology
- Fish biology, ecology, and behavior
- Cephalopods and Marine Biology
- Marine and coastal plant biology
- Marine Biology and Ecology Research
Kitasato University
2015-2024
Tokyo University of Marine Science and Technology
2023
Japan Fisheries Research and Education Agency
2021
The University of Tokyo
1999-2012
Nitobe Memorial Nakano General Hospital
2001-2006
The natural reproductive ecology of freshwater eels remained a mystery even after some their offshore spawning areas were discovered approximately 100 years ago. In this study, we investigate the for first time using collections eggs, larvae and spawning-condition adults two species in shared area Pacific. Ovaries female Japanese eel giant mottled polycyclic, suggesting that can spawn more than once during season. collection eggs near West Mariana Ridge where newly hatched also caught shows...
Extensive collections were made of the larvae temperate Japanese eel Anguilla japonica and tropical giant mottled marmorata in an overlapping area North Equatorial Current region western Pacific Ocean. Collections 189 A. > 2500 during nine surveys from 1991 to 2007 showed that these two anguillid eels have similar spawning areas just west southern West Mariana Ridge. In July August 2006 2007, morphologically genetically identified preleptocephali mainly collected between 14·5–15° N...
The Japanese eel, Anguilla japonica, spawns within the North Equatorial Current that bifurcates into both northward and southward flows in its westward region, so spawning location larval transport dynamics seem important for understanding fluctuations recruitment to East Asia. Intensive research efforts determined eels spawn along western side of West Mariana Ridge during new moon periods, where all oceanic life history stages have been collected, including eggs adults. However, how decide...
The metazoan 70-kDa heat shock protein (HSP70) family contains several members localized in different subcellular compartments. cytosolic have been classified into inducible HSP70s and constitutive cognates (HSC70s), but their distinction evolutionary relationship remain unclear because of occasional reports "constitutive HSP70s" the lack cross-phylum comparisons. Here we provide novel insights evolution these important molecular chaperones. Phylogenetic analyses 125 full-length from a broad...
Summary 1 Extension of life span by food shortage, often mimicked calorie restriction (CR) in the laboratory, is one most common life‐history alterations eukaryotes. Although offspring changes response to parental environment, it has remained ambiguous whether or not CR‐induced longevity transmitted next generation. 2 Here, we investigated effects CR on span, oxidative stress resistance and expression levels two antioxidant enzymes, catalase manganese superoxide dismutase (Mn SOD),...
Tropical species of anguillid glass eels have recently been exploited to be a substitute for the commercially important Anguilla japonica or A. anguilla, so information about their life histories is needed facilitate conservation. To understand ecological aspects eel recruitment patterns tropical eels, spp., monthly monitoring compositions at mouth Cagayan River in northern Luzon Philippines was carried out different time periods from May 2008 September 2009 and November 2011 December 2012....
Abstract Fish distributions in river systems are known to be affected by large dams and other artificial cross‐river structures such as weirs that prevent their movements migrations. However, little is about the cumulative effect of low‐height barriers on fish distributions. Although fishes like eels lampreys, which include endangered species, have a unique type ability climb or attach obstacles, strength anguilliform swimming locomotion style generally lower than fishes. To investigate...
The Japanese eel Anguilla japonica spawns in the North Equatorial Current Philippine Sea and their larvae are transported to freshwater growth habitats East Asia. Here we report occurrence biological characteristics of glass eels A. that were collected on northern Luzon Island Philippines, southern limit distribution range this species. Anguillid recruiting Cagayan River estuary January February 2009 identified using morphological genetic characteristics. Among 767 specimens, 52 found be...
A new anguillid eel species, Anguilla luzonensis, was recently discovered on Luzon Island of the northern Philippines, but little is known about its life history. DNA identification used to determine that five leptocephali this species (29.2–51.2 mm) were collected offshore in western North Pacific (13°–17.5° N, 125°–141° E) April, June, and July between 2002 2009. One leptocephalus caught west four close spawning areas japonica marmorata. Otolith microstructure showed up 103–138 days old....