Publications

examining landscape dynamics at a watershed scale using landsat tm imagery for detection of wintering hooded crane decline in yashiro, japan.	it is usually inappropriate to define rectangular land areas or administrative units as the extent for quantifying landscapes that possess hierarchical structure. as a functional unit established by geophysical relationships, the watershed is one of many natural scales in the hierarchical landscape. we examined the dynamics of the yashiro watershed of japan at the landscape level using pattern metrics based on landsat thematic mapper (tm) imagery from 1985 to 1998. this watershed provides import ...	2003	12592452
genetical identification of coccidia in red-crowned crane, grus japonensis.	we genetically analyzed eimerian oocysts isolated from the red-crowned crane (grus japonensis) in hokkaido, a northern island of japan. two types of oocysts of which shapes were similar to eimeria gruis and e. reichenowi were found. nearly the total length of the 18s ribosomal rna gene (about 1.7 kbp in length) was amplified from single oocyst of each type and was sequenced. the respective sequences showed high similarity to those of published partial sequences (349 bp) of e. gruis type oocyst a ...	2007	17102986
oligoastrocytoma of the brain in a hooded crane (grus monacha).	a cerebral tumor was identified at necropsy in a mature female hooded crane (grus monacha). on gross examination, the cut surface of the tumor revealed a soft gelatinous mass. on histologic examination, the tumor was mainly composed of 2 discrete components that resembled oligodendroglioma and astrocytoma. both components had anaplastic changes, such as pleomorphism, high proliferative activity, microvascular proliferation, and necrosis. the oligodendrogliomatous component showed a honeycomb app ...	2009	19261644
detection of parasitizing coccidia and determination of host crane species, sex and genotype by faecal dna analysis.	in japan, the three main crane species are the endangered red-crowned crane (grus japonensis) inhabiting hokkaido, the northernmost island of japan; the vulnerable hooded crane (grus monacha); and the vulnerable white-naped crane (grus vipio). both the hooded and white-naped cranes migrate in winter to izumi in kyushu, the southern island of japan. in this study, we investigated the cranes and their coccidian parasites, through a targeted molecular approach using faecal dna to develop a noninvas ...	2011	21791031
accurate analysis of prevalence of coccidiosis in individually identified wild cranes in inhabiting and migrating populations in japan.	eimeria gruis and e. reichenowi cause coccidiosis, a major parasitic disease of cranes. by non-invasive molecular approaches, we investigated the prevalence and genetic characterization of pathogens in two japanese crane habitats; one is hokkaido inhabited by the endangered red-crowned crane, and the other is izumi in kyushu where populations that consist mainly of vulnerable hooded and white-naped cranes migrate in winter. the non-invasively collected faecal samples from each wintering populati ...	2011	21895916
testing the utility of mitochondrial cytochrome oxidase subunit 1 sequences for phylogenetic estimates of relationships between crane (grus) species.	morphology and biogeography are widely used in animal taxonomy. recent study has suggested that a dna-based identification system, using a 648-bp portion of the mitochondrial gene cytochrome oxidase subunit 1 (co1), also known as the barcoding gene, can aid in the resolution of inferences concerning phylogenetic relationships and for identification of species. however, the effectiveness of dna barcoding for identifying crane species is unknown. we amplified and sequenced 894-bp dna fragments of ...	2011	22194213
vertebral formula in red-crowned crane (grus japonensis) and hooded crane (grus monacha).	red-crowned cranes (grus japonensis) are distributed separately in the east eurasian continent (continental population) and in hokkaido, japan (island population). the island population is sedentary in eastern hokkaido and has increased from a very small number of cranes to over 1,300, thus giving rise to the problem of poor genetic diversity. while, hooded cranes (grus monacha), which migrate from the east eurasian continent and winter mainly in izumi, kagoshima prefecture, japan, are about eig ...	2014	24334828
using stochastic gradient boosting to infer stopover habitat selection and distribution of hooded cranes grus monacha during spring migration in lindian, northeast china.	the hooded crane (grus monacha) is a globally vulnerable species, and habitat loss is the primary cause of its decline. to date, little is known regarding the specific habitat needs, and stopover habitat selection in particular, of the hooded crane. in this study we used stochastic gradient boosting (treenet) to develop three specific habitat selection models for roosting, daytime resting, and feeding site selection. in addition, we used a geographic information system (gis) combined with treene ...	2014	24587118
nest-site selection analysis of hooded crane (grus monacha) in northeastern china based on a multivariate ensemble model.	avian nest-site selection is an important research and management subject. the hooded crane (grus monacha) is a vulnerable (vu) species according to the iucn red list. here, we present the first long-term chinese legacy nest data for this species (1993-2010) with publicly available metadata. further, we provide the first study that reports findings on multivariate nest habitat preference using such long-term field data for this species. our work was carried out in northeastern china, where we fo ...	2014	25001914
population sizes and group characteristics of siberian crane (leuco-geranus leucogeranus) and hooded crane (grus monacha) in poyang lake wetland.	both the siberian crane (leucogeranus leucogeranus) and hooded crane (grus monacha) have limited population sizes and are considered endangered by domestic chinese and international agencies. to document the current size of their respective populations and characterize their groups, between october 2012 and april 2013 we undertook fieldwork at four nature reserve areas within the poyang lake wetlands. we divided poyanghu national nature reserve (pyh) into the wucheng (pwc) and hengfeng areas (ph ...	2014	25297076
vigilance and activity time-budget adjustments of wintering hooded cranes, grus monacha, in human-dominated foraging habitats.	due to loss and degradation of natural wetlands, waterbirds increasingly rely on surrounding human-dominated habitats to obtain food. quantifying vigilance patterns, investigating the trade-off among various activities, and examining the underlying mechanisms will help us understand how waterbirds adapt to human-caused disturbances. during two successive winters (november-february of 2012-13 and 2013-14), we studied the hooded crane, grus monacha, in the shengjin lake national nature reserve (nn ...	2015	25768111
why choose random forest to predict rare species distribution with few samples in large undersampled areas? three asian crane species models provide supporting evidence.	species distribution models (sdms) have become an essential tool in ecology, biogeography, evolution and, more recently, in conservation biology. how to generalize species distributions in large undersampled areas, especially with few samples, is a fundamental issue of sdms. in order to explore this issue, we used the best available presence records for the hooded crane (grus monacha, n = 33), white-naped crane (grus vipio, n = 40), and black-necked crane (grus nigricollis, n = 75) in china as t ...	2017	28097060
the gut microbiome of hooded cranes (grus monacha) wintering at shengjin lake, china.	gut microbes of animals play critical roles in processes such as digestion and immunity. therefore, identifying gut microbes will shed light on understanding the annual life of animal species, particularly those that are threatened or endangered. in the present study, we conducted nucleotide sequence analyses of the 16s rrna genes of gut microbiome of the hooded cranes (grus monacha) wintering at shengjin lake, china, by illumina high-throughput sequencing technology. we acquired 503,398 high-qu ...	2017	28127902
identification of two novel reassortant avian influenza a (h5n6) viruses in whooper swans in korea, 2016.	on november 20, 2016 two novel strains of h5n6 highly pathogenic avian influenza virus (hpaivs) were isolated from three whooper swans (cygnus cygnus) at gangjin bay in south jeolla province, south korea. identification of hpaivs in wild birds is significant as there is a potential risk of transmission of these viruses to poultry and humans.	2017	28327168
genetic characterization of low-pathogenic avian influenza viruses isolated on the izumi plain in japan: possible association of dynamic movements of wild birds with aiv evolution.	the izumi plain in kagoshima prefecture, japan, is an overwintering site of endangered cranes (hooded cranes and white-naped cranes) and of many other migratory birds (including wild ducks) that are considered carriers of avian influenza viruses (aivs). to assess the risks of a highly pathogenic avian influenza outbreak in the crane populations, we tested various environmental samples for aivs in this area. in the 2014-2015 winter season, we isolated one aiv of the h6n2 subtype from the cranes' ...	2018	29299682
characterization of gizzards and grits of wild cranes found dead at izumi plain in japan.	we analyzed the gizzards, and grits retained in the gizzards of 41 cranes that migrated to the izumi plain during the winter of 2015/2016 and died there, either due to accident or disease. these included 31 hooded cranes (grus monacha) and 10 white-naped cranes (g. vipio). we determined body weight, gizzard weight, total grit weight and number per gizzard, and size, shape, and surface roundness of the grits. average gizzard weights were 92.4 g for hooded cranes and 97.1 g for white-naped cranes, ...	2018	29503349
contamination status of seven elements in hooded cranes wintering in south-west kyushu, japan: comparison with red-crowned cranes in hokkaido, japan.	the hooded crane is designated as an endangered species. the cranes breed primarily in wetlands in southeast russia and china in summer. most of the hooded crane population winters in the izumi plain in japan. it is difficult to know the contamination status of their habitat because of their vast breeding area. we determined the levels of cd, pb, as, (total) hg, se, zn, and cu in the liver, kidney, and muscle of hooded cranes that were found dead in izumi in the periods 2003-2006 and 2014-2015 c ...	2018	29855680
significant differences in bacterial and potentially pathogenic communities between sympatric hooded crane and greater white-fronted goose.	the gut microbiota of vertebrates play a crucial role in shaping the health of their hosts. however, knowledge of the avian intestinal microbiota has arguably lagged behind that of many other vertebrates. here, we examine the intestinal bacterial communities of the hooded crane and the greater white-fronted goose at the shengjin lake of china, using high-throughput sequencing (illumina mi-seq), and infer the potential pathogens associated with each species. intestinal bacterial alpha-diversity i ...	2019	30804919
variations in gut bacterial communities of hooded crane (grus monacha) over spatial-temporal scales.	microbes have been recognized as important symbionts to regulate host life. the animal gut harbors abundance and diverse bacteria. numerous internal and external factors influence intestinal bacterial communities, including diet, seasonal fluctuations and habitat sites. however, the factors that influence the gut bacterial communities of wild bird is poorly characterized.	2019	31218123
[potential habitat and priority protection area of cranes with climate change in the great xing'an mountains, china].	to clarify the impacts of climate change on the potential distribution of six crane species in the great xing'an mountains region, and promote the effective protection of these species, we selected key environmental variables such as climate, topography, and vegetation type based on pearson correlation and jackknife analysis, and modeled the potential distribution of six crane species in the great xing'an mountains using maxent with the current and the future climate change scenarios (rcp4.5 and ...	2019	31418249
pathogenicity of h5 highly pathogenic avian influenza virus in rooks (corvus frugilegus).	rooks (corvus frugilegus) are considered migratory crows in japan. some rooks share a wintering site in the izumi plain in kagoshima prefecture with hooded cranes (grus monacha) and white-necked cranes (grus vipio), which are designated as "endangered" in the international union for conservation of nature (iucn) red list of threatened species. highly pathogenic avian influenza (hpai), caused by h5 subtype viruses, has recently been reported in these crane species in japan, in conjunction with a ...	2020	32013539
flexible foraging response of wintering hooded cranes (grus monacha) to food availability in the lakes of the yangtze river floodplain, china.	wetlands are disappearing or degrading at an unprecedented rate due to the increase in human encroachment and disturbance, eventually leading to habitat loss for waterbirds, which is the primary cause of the decline in the hooded crane (grus monacha) population. the hooded cranes have to constantly adjust their foraging strategies to survive to cope with this situation. in order to study how cranes respond to food resources in mosaic habitat, we surveyed a total of 420 food quadrats and 736 beha ...	2020	32230979
significant differences in the gut bacterial communities of hooded crane (grus monacha) in different seasons at a stopover site on the flyway.	intestinal bacterial communities form an integral component of the organism. many factors influence gut bacterial community composition and diversity, including diet, environment and seasonality. during seasonal migration, birds use many habitats and food resources, which may influence their intestinal bacterial community structure. hooded crane (grus monacha) is a migrant waterbird that traverses long distances and occupies varied habitats. in this study, we investigated the diversity and diffe ...	2020	32316467
fracture status of wild cranes (grus monacha and g. vipio) found dead or in a weak condition at izumi plain in japan.	the izumi plain in kagoshima prefecture, japan, is a major wintering ground for wild cranes. between october 2009 and march 2016, a total of 204 hooded cranes grus monacha and white-naped cranes g. vipio were found dead or in a weak condition in the plane. of these, 56 cranes had bone fractures. the rate of incidence of fracture was considered to be higher in white-naped than in hooded cranes. tibia fractures were the most common. the leg and wing fracture numbers were almost equal. forty six pe ...	2020	32418942
study on landscape ecological risk assessment of hooded crane breeding and overwintering habitat.	xinqing wetland and shengjin lake wetland are the main habitats of hooded crane in china. however, in recent years, the irrational land use situation of occupied wetlands has occurred frequently, resulting in the destruction of the breeding of the hooded crane population and the destruction of the wintering habitat. the paper takes xinqing wetland and shengjin lake wetland as the research area, and uses landscape ecology and geostatistics as the theoretical basis to reveal the changes of land la ...	2020	32442790
chondrosarcoma with undifferentiated neoplastic cell proliferation around the distal tibiotarsus bone in a wild hooded crane (grus monacha).	an adult male hooded crane was found dead on the izumi plane. at autopsy, subcutaneous nodules were found around the medial and lateral sides of the left distal tibiotarsus bone. the largest cross-section of the masses revealed a multilobular pattern, with small amounts of viscous mucus. histopathologically, the nodules were composed of three types of neoplastic cells: chondrocytic cells with abundant lightly basophilic cartilaginous matrices, mesenchymal cells and a small portion of the neoplas ...	2020	32507786
corrigendum to "study on landscape ecological risk assessment of hooded crane breeding and overwintering habitat" [volume 187 (august 2020) 109649].		2020	32755555
corrigendum to 'study on landscape ecological risk assessment of hooded crane breeding and overwintering habitat' [volume 187, august 2020, 109649].		2020	32836097