A5046692910- Avian ecology and behavior
- Animal Behavior and Reproduction
- Radioactive contamination and transfer
- Vector-borne infectious diseases
- Viral Infections and Vectors
- Genetic diversity and population structure
- Radioactivity and Radon Measurements
- Plant and animal studies
- Bird parasitology and diseases
- Animal Ecology and Behavior Studies
- Insect and Pesticide Research
- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Marine and fisheries research
- Vector-Borne Animal Diseases
- Marine and coastal plant biology
- Coastal and Marine Management
- Genetic and phenotypic traits in livestock
- Biofuel production and bioconversion
- Nuclear and radioactivity studies
- Species Distribution and Climate Change
- Radioactive element chemistry and processing
- Food Industry and Aquatic Biology
- Ecology and Vegetation Dynamics Studies
- Lignin and Wood Chemistry
Tokai University
2017-2025
Tokyo University of the Arts
2025
The University of Tokyo
2025
Osaka City University
2006-2022
Rikkyo University
2011-2017
Hokkaido Agricultural Research Center
2016
Institut de Radioprotection et de Sûreté Nucléaire
2015
University of Tsukuba
2015
Kitami Institute of Technology
2015
Institute for Fermentation
1993
ABSTRACT Climate change, land development, and increased outdoor human activity have the prevalence distribution of tick-borne pathogens, causing public health issues. Asia is a pivotal region emerging infectious diseases caused by zoonotic disease. Therefore, this study aimed to construct effective surveillance systems establish preventive strategies against novel diseases. Next-generation sequencing (NGS) was performed detect pathogens from animal blood-fed ticks. Ticks ( n = 261) were...
Several species of birds in Minami Daito Island, an oceanic island located the far south from main islands Japan, were found to be infected with avian Plasmodium. However, no vector malaria this have been revealed yet. To speculate potential vectors, we collected mosquitoes there and investigated using a PCR procedure whether harbor or not. Totally 1,264 including 9 during March 2006 February 2007. The stored every species, sampled date location for DNA extraction. Fifteen out 399 samples...
Estado De Otus Elegans Interpositus En La Isla Minami-daito, Japon elegans esta listada en la Lista Roja de Especies Amenazadas del 2004 UICN como casi amenazada, y subespecie O. e. interpositus peligro el Libro Rojo Datos Okinawa. es endemica las Islas Minami-daito Kita-daito, cuales se localizan a 360 km Okinawa (25°50′N, 131°14′E), Japon. Desde 22 marzo al 12 mayo 2005, contamos numero machos que respondieron llamadas reproducidas Minami-daito. Confirmamos presencia 245 machos, 155 los...
Summary The introduction of exotic rats Rattus spp. is one the most important factors contributing to reduction in avian diversity and extinctions on oceanic islands. However, little known about other than predation, which are associated with loss island biodiversity. We report that introduced Ship Rats rattus constructed arboreal dome-shaped nests secondarily used open-cup Bull-headed Shrike Lanius bucephalus for roosting or rearing young trees within hedgerows along sugarcane fields...
This report describes, for the first time, harmful effects of invasive Yellow Crazy Ants Anoplolepis gracilipes on wild birds in Japan. We observed fledglings Bull-headed Shrike Lanius bucephalus and Daito White-eye Zosterops japonicus daitoensis caused fatal injuries by ants ground Minami-daito Island. compared reproductive behaviors Scops Owl Otus elegans interpositus a cavity with cavities without found that while success did not differ between them, parental females more frequently...
Abstract Sex allocation theory predicts that parents bias the offspring sex ratio strategically. In avian species, can be biased at multiple growth stages, although mechanisms are not well known. It is crucial to reveal a cause and timing of ratio. We investigated (i) from laying fledging; (ii) stage which became biased; (iii) in Eurasian tree sparrows Passer montanus . determination 218 offspring, including hatchlings unhatched eggs 41 clutches, suggested was egg‐laying but significantly...
Haemosporidian parasites infection among wild birds inhabiting Minami-daito Island was studied. Blood films from 183 representing 4 species of families were examined microscopically. Avian haemosporidian detected in 3 with an overall prevalence 59.6%. None the 30 Daito scops owls (Otus interpositus) infected. Either Haemoproteus sp. or Plasmodium found 14 31 (45.2%) Borodino islands white-eyes (Zosterops japonicus daitoensis). spp. 94 102 (92.2%) bull-headed shrikes (Lanius bucephalus) and 1...
Appropriate nest‐site selection is one of the most important ways to minimize loss reproductive investment due predation. We determined environmental characteristics associated with nest predation during incubation and nestling periods arboreal nesting Bull‐headed Shrikes on oceanic Minami‐Daito Island where predator community has low species diversity includes only three introduced mammals: Ship Rat Rattus rattus , Japanese Weasel Mustela itatsi Feral Cat Felis catus . Egg declined...
We investigated whether the badge size of Eurasian Tree Sparrow Passer montanus is correlated with morphological traits and hematocrit during breeding season in order to elucidate function as a potential signal body physiological condition. found positive correlation males between hematocrit, but not females. As individuals larger values can transport more oxygen their tissues or organs, male may be linked ability. suggest that status.
Since the 1970s Bull-headed Shrike Lanius bucephalus has established a breeding population on Daito Islands. The islands represent southwestern limit of species' range. We investigated habitat selection this isolated during 2003 season in agricultural landscape Minami-daito Island. A comparison types around shrike nests and randomly selected points, showed that shrikes largely foraged sugarcane fields utilized fences utility wires as suitable perch sites. Our results suggest it is open,...
The seasonal prevalence and spatial distribution of mosquitoes were examined as part an avian malaria study on the oceanic island Minami-Daito Island, Japan. Because dry ice was not available in this study, yeast-generated CO2 used to attract biting mosquitoes. Adult collected biweekly using battery-operated traps enhanced with a gravid trap from March 2006 February 2007. CO2-baited distributed 4 different habitats: sugar cane field, forest vegetation ring, residential area, swamp area. At 3...
Multi-material components (e.g., bimetallic components) are considered better than their monometallic counterparts in terms of sustainability. To get some insights into the machining characteristics a component, turning experiments have been conducted using specimens made aluminum and titanium alloys, mild stainless steels, cast iron. The nonlinearity exhibited by cutting force signals is analyzed from perspective time, frequency, delay domains. How to estimate power represent forces fuzzy...
福島第一原子力発電所事故から1年後の2012年に東京,長野,茨城,福島を含む地上から1 mの空間線量率が0.11-21.4(μGy/h)の地点で回収したカラ類(シジュウカラParus minorもしくはヤマガラPoecile varius)の主にコケ類を用いて作られた巣材の放射性セシウム[Cs-134+Cs-137]濃度は6.6-6,128.9(Bq/g dry weight, n=14)となり,空間線量率が高い場所で採集した巣材ほど,巣材の放射性セシウム濃度が高くなる傾向があった.これらの結果は,地上1 mの空間線量率は相対的な巣材の汚染レベルの指標になりうることを示唆し,空間線量率の高い地域ほど巣材に含まれる放射性物質から繁殖期に卵,雛,親が近接的に受ける外部被曝線量率が増加すると考えられた.
福島第一原発事故から1年が経過した2012年に福島県内で採集したスズメ目鳥類3種（ヤマガラ，スズメ，カワラヒワ）の成鳥と，シジュウカラの未孵化卵および巣材で測定した放射性セシウム（134Cs...
日本において，スズメPasser montanusは家屋の隙間などの人工物に営巣することが知られているが，都市開発による家屋などの構造の変化により，スズメの営巣場所，巣の分布様式，そして繁殖成績まで，都市部と農村部で異なる可能性がある．本研究では，スズメの営巣場所，営巣場所の再利用回数，繁殖時期，巣の分布様式を地域間比較した．スズメは都市部では主に電柱の隙間に，農村部では主に家屋の隙間に営巣しており，両地域の営巣場所には有意な違いが見られた．都市部では農村部よりも1回多く繁殖ピークが見られた．両地域では再利用された営巣場所が見られ，再利用回数は農村部に比べて都市部の方が多かった．巣の分布様式は，都市部はランダム分布，農村部では集中分布を示した．人工物の量や質，分布といった営巣可能な場所の違いが，都市部と農村部における違いを産み，さらにはスズメの個体間の相互作用や繁殖成績にも影響を与える可能性がある．
<title>Abstract</title> Background Climate change, land development, and increased outdoor human activity have the prevalence distribution of tick-borne pathogens, causing public health issues. Asia is considered a pivotal region emerging infectious diseases caused by zoonotic disease, thus requiring active research in Asian countries. Therefore, this study aimed to conduct effective surveillance systems establish preventive strategies against introducing novel diseases. Methods Blood-fed...