discovery of fenthion poisoning in two japanese cranes (grus japonensis) found dead in hokkaido, japan. 200415674706
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
changes of mercury contamination in red-crowned cranes, grus japonensis, in east hokkaido, cranes (grus japonensis) are native to eastern hokkaido (island population), in contrast to the mainland, which migrates between the amur river basin and eastern china-korea peninsula. during the 1990s we found that red-crowned cranes in hokkaido were highly contaminated with mercury: however, the source was unknown. we investigated the time trend of mercury contamination in red-crowned cranes. total mercury levels in the livers and kidneys from cranes dead in the 2000s were lower th ...201222193864
large-scale survey of mitochondrial d-loop of the red-crowned crane grus japonensis in hokkaido, japan by convenient genotyping method.the red-crowned crane, grus japonensis, is an endangered species of crane that has two separate breeding populations, one in the amur river basin (continental population) and the other in eastern or northern hokkaido, japan (island population). so far, only two haplotypes (gj1 and gj2) have been identified in the mitochondrial d-loop in island population, whereas seven haplotypes have been found in continental population (gj3-gj9). we developed a rapid and inexpensive method of extensive genotyp ...201322972466
physical body parameters of red-crowned cranes grus japonensis by sex and life stage in eastern hokkaido, (or japanese) cranes grus japonensis are native to eastern hokkaido, japan--the island population, and mainland asia--the continental population that migrates from breeding grounds along the amur river basin to winter in east china and the korean peninsula. the island population was reduced to about 50-60 birds in early part of the 20th century. since 1950s, the population has increased to more than 1,300 as a consequence of human-provided food in winter, resulted in change of their ...201323585489
origin of three red-crowned cranes grus japonensis found in northeast honshu and west hokkaido, japan, from 2008 to 2012.the red-crowned crane grus japonensis is an endangered species that has two separate breeding populations, one in the amur river basin and the other in north and east hokkaido, japan. so far, only two (gj1 and gj2) and seven (gj3-gj9) haplotypes in d-loop of mtdna were identified in japan and in the continent, respectively. we obtained feathers from three cranes found in northeast honshu. the crane in akita in 2008, which also arrived at west hokkaido, had a novel haplotype (gj10). another crane ...201323628973
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
accumulation properties of inorganic mercury and organic mercury in the red-crowned crane grus japonensis in east hokkaido, japan.the red-crowned (japanese) crane grus japonensis is native to east hokkaido, japan, in contrast to the east asia mainland. previously, we reported that red-crowned cranes in hokkaido were highly contaminated with mercury in the 1990s and that the contamination rapidly decreased to a moderate level in the 2000s. in the present study, we determined levels of organic mercury (o-hg) in the liver and kidney of cranes in east hokkaido in comparison with levels of total mercury (t-hg). t-hg levels in t ...201526432029
persistent organic pollutants in red-crowned cranes (grus japonensis) from hokkaido, japan.the red-crowned crane (grus japonensis) from eastern hokkaido is classified as a special natural monument in japan. in this study, we determined the concentrations of persistent organic pollutants (pops) in red-crowned crane muscle tissues (n = 47). polychlorinated biphenyls (pcbs) had the highest median concentration (240ng/g lipid weight), followed by dichlorodiphenyltrichloroethane and its metabolites (ddts) (150ng/g lipid weight), chlordane-related compounds (chls) (36ng/g lipid weight), hex ...201728869886
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
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