A5066493144- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Genetic diversity and population structure
- Wildlife Ecology and Conservation
- Zoonotic diseases and public health
- Species Distribution and Climate Change
- Fish Biology and Ecology Studies
- Animal Ecology and Behavior Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Environmental DNA in Biodiversity Studies
- Freshwater macroinvertebrate diversity and ecology
- Engineering Applied Research
- Radioactive contamination and transfer
- Isotope Analysis in Ecology
- Forest Insect Ecology and Management
- Forensic and Genetic Research
- Identification and Quantification in Food
- Carcinogens and Genotoxicity Assessment
- Insect and Pesticide Research
- DNA Repair Mechanisms
Tokyo University of Agriculture and Technology
2024-2025
Japan Wildlife Research Center
2014-2024
National Institute for Environmental Studies
2016
Nature Conservation Agency
2016
University of Tsukuba
2007-2011
There is an urgent need to develop global observation networks quantify biodiversity trends for evaluating achievements of targets Kunming-Montreal Global Biodiversity Framework. Camera traps are a commonly used tool, with the potential enhance monitoring wildlife population and has capacity constitute by applying unified sampling protocol. The Snapshot protocol simple easy camera trapping which applied in North America Europe. However, there no regional camera-trap network Asia. We present...
Overuse of natural resources by humans is a major threat to biodiversity. often involves species economic or esthetic value, and fish are typical example for group that exploited both reasons (for human consumption) (e.g. aquarists). Pseudorhodeus tanago (Tanaka, 1909) (formerly known as Tanakia tanago) small colorful but legally protected (fishing, keeping transfer banned) bitterling distributed around Tokyo, Japan. Whereas it critically endangered more habitat loss has occurred, at least...
In order to establish methodology for population estimation of Asiatic black bears using the hair-trapping method, devices were located within a study area, and basic data collected determine optimal survey period hair sampling. Bear hairs classified as three types (guard hair; G, underfur; U, intermediate I) depending on hair-bulb thickness. After DNA extraction, six microsatellite loci amelogenin locus amplified in identify individual sex, respectively. The number by decreased dramatically...
霞ヶ浦には，在来種のヤリタナゴ，ゼニタナゴ，タナゴおよびアカヒレタビラの4種が同所的に生息する。近年，これら個体群の減少が著しく，地域絶滅が危惧されるものの，種ごとの個体数変動の要因はよく分かっていない。そこで，本湖におけるタナゴ亜科魚類群集の変遷とその要因を明らかにするため，1999年から2011年まで，タナゴ亜科魚類およびその産卵基質として利用されるイシガイ科二枚貝類の生息状況調査を実施した。調査の結果，在来タナゴ類の内，ゼニタナゴとヤリタナゴは採集されず，アカヒレタビラとタナゴは湖内全域で徐々に減少し，2010年頃にはほとんど採集されなくなった。外来種のオオタナゴは2000年頃に初確認され，その後徐々に増加し，2005年以降は毎年採集された。外来種のタイリクバラタナゴは減少傾向にあり，国内外来種のカネヒラも全調査期間を通して数個体しか採集されなかった。一般化混合加法モデルを用いて種ごとにタナゴ類個体数の時系列変化を解析した結果，在来タナゴ類が激減した要因として，オオタナゴの影響は検出できなかった。在来タナゴ類が利用するイシガイ科二枚貝類は，2006年の調査時点において，湖内...
The aims of this study were to elucidate factors contributing the expansion distributions sika deer and wild boar in Japan predict their by 2025, 2050, 2100. A site occupancy model was constructed using information on species distribution collected Ministry Environment 1978, 2003, 2014, 2018, days snow cover, forested road areas, elevation, human population, distance from occupied grid cells as covariates calculate probability change. Factors elucidated predicted. Distance had strongest...
After the Fukushima Daiichi Nuclear Power Plant accident, we studied chromosomal aberrations (dicentrics and translocations) in splenic lymphocytes of wild mice inhabiting prefecture. Here, report frequencies large Japanese field (Apodemus speciosus) captured from 2012 to 2016 a heavily contaminated area. The were detected using newly developed 4-color FISH (fluorescence situ hybridization) with A. speciosus chromosome 1-, 3-, 4- 5-specific painting probes. July October 2014 significantly...
A new laser interferometric measuring machine for the sphere diameter has been developed. In machine, a 633 nm commercial stabilized He-Ne and variable length vacuum cell made of metal bellows are employed. It became possible to make on beam path, so air turbulences excluded effect refractive index is eliminated. The Abbe's principle alignment workpiece with measurement satisfied. Moreover, control mechanism contact force, which coincided axis beam, developed applied machine. As result...