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 ...201424587118
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 ...201525768111
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 ...201728097060
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 ...201728127902
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 ...201425297076
detection of parasitizing coccidia and determination of host crane species, sex and genotype by faecal dna 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 ...201121791031
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 ...201424334828
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 ...201122194213
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 ...200717102986
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 ...201121895916
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 ...201425001914
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 ...200919261644
examining landscape dynamics at a watershed scale using landsat tm imagery for detection of wintering hooded crane decline in yashiro, 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 ...200312592452
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.201728327168
Displaying items 1 - 14 of 14