Distribution of the Red-crowned Crane in the World

Masatomi, Yoshiyuki; Surmach, Sergei G.

doi:10.1007/978-981-10-7203-1_5

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…Since we were not able to collect feces and intestinal contents in the back regions of a large wetland such as Kushiro Wetland, some cranes in those areas may have different carnivorous diets, although most cranes now live in peripheral areas of a large wetland [ 22 ]. The information we obtained on the dietary status of most red-crowned cranes in eastern Hokkaido is not completely consistent with conventional descriptions highlighting aquatic and terrestrial animals such as fish, crabs and earthworms as their carnivorous diets [ 19 , 24 ]. Our data should be basic data for making an effective conservation plan for red-crowned cranes in the island population in eastern Hokkaido, for which the life style and area are continuing to change.…”

Section: Discussioncontrasting

confidence: 72%

“…They need marshland covered with common reed bush for nesting and cannot live in the forest, although there is a large forest area in eastern Hokkaido [ 20 ]. Because their population as well as density of nests dramatically increased from 50 to about 1,600 by 2018 and marshland for nesting has been decreasing due to industrial and agricultural development, the area of land that is suitable for nesting has been decreasing [ 24 ].…”

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confidence: 99%

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Metabarcoding of feces and intestinal contents to determine carnivorous diets in red-crowned cranes in eastern Hokkaido, Japan

et al. 2022

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The red-crowned crane Grus japonensis in Hokkaido, Japan forms a closed population as a residence that is independent of the mainland population. Based on observations of a limited number of individuals as well as cranes in captivity, red-crowned cranes are omnivores and eat fish, worms, insects and plants in their own territories except in winter, when they are fed with dent corn that is supplied in eastern Hokkaido. DNA metabarcoding based on high throughput sequencing was carried out using universal primer sets for cytochrome oxidase subunit I gene. Feces from 27 chicks collected in June and July in the period from 2016 to 2018 and intestinal contents from 33 adult and subadult cranes that were found dead almost throughout year in 2006-2013 in the field in eastern Hokkaido were used. Although compositions varied considerably in the cranes, both insects and fish were found in adults and subadults to the same extents, while insects were predominant in chicks. Both insects and fish were detected in all seasons for adults and subadults. Horse flies, scarab beetles and weevils accounted for the most of the insects regardless of the life stage. Dace, stickleback, flatfish and sculpin were the major fish species in adults, while chicks ate almost only stickleback. The results provide the first comprehensive data on carnivorous diets in wild red-crowned cranes in eastern Hokkaido as basis for conservation of red-crowned cranes, for which the life style and area continuing to change.

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Section: Discussioncontrasting

confidence: 72%

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confidence: 99%

Metabarcoding of feces and intestinal contents to determine carnivorous diets in red-crowned cranes in eastern Hokkaido, Japan

et al. 2022

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“…The red-crowned (or Japanese) crane Grus japonensis is an endangered species in the world with an estimated total population of about 3,000 [11]. There are two independent populations of red-crowned cranes, a migratory population in the east Eurasian continent (continental population) and a non-migratory population in eastern Hokkaido, Japan (island population), based on the difference of these geographical distributions and historical changes in the number of individuals and distribution area of the island population [8,11]. The island population had become nearly extinct at the end of the 19th century.…”

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confidence: 99%

Origin of a pair of red-crowned cranes (<i>Grus japonensis</i>) found in Sarobetsu Wetland, northwestern Hokkaido, Japan: a possible crossbreeding between the island and the mainland population

Kawasaki

Hasebe²,

Hwang

et al. 2022

The Journal of Veterinary Medical Science

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Red-crowned cranes Grus japonensis, which are an endangered species, have two separate populations, a mainland population in the Eurasian continent and an island population in eastern Hokkaido, Japan. Island cranes showed three haplotypes (Gj1, Gj2 and Gj13), whereas ten haplotypes (Gj3-Gj12) were confirmed in captive cranes and stray cranes. We found Gj5 haplotype in feathers of two cranes as well as four new haplotypes in seven wild crane feathers collected in South Korea. We also found feathers in the nest in Sarobetsu Wetland in northwestern Hokkaido. While the haplotype of female-derived feathers was Gj2, that of male-derived feathers was Gj5. The results suggest that there has been crossbreeding between cranes in the island population and cranes in the mainland population.

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“…This suggests that no or only a weak trend of inbreeding occurred in the island population. Taking into consideration the fact that about 20 or 40 red-crowned cranes remained in a restricted area in Kushiro Wetland for a long time [ 13 ], it is more likely that a bottleneck effect is the cause of scarce genetic diversity in the Hokkaido population [ 9 , 10 , 11 ].…”

Section: Discussionmentioning

confidence: 99%

“…Haplotype analyses clearly suggested that the genetic diversity of red-crowned cranes in the island population is very poor, and only three haplotypes (Gj1, Gj2 and Gj3) were confirmed, whereas 14 haplotypes (Gj4-Gj6/18) were confirmed in the continental population [ 9 , 10 , 11 ]. It is speculated that this scarce diversity of red-crowned cranes in the island population might be caused by bottleneck effects since they were nearly extinct at the end of the 19th century [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Conventional Gel Electrophoresis-Resolvable Insertion/Deletion Markers for Individual Identification and Analysis of Population Genetics in Red-Crowned Cranes in Eastern Hokkaido, Japan

Kawasaki

Dong

Sawada

et al. 2022

Animals

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Red-crowned crane Grus japonensis is an endangered species in two separate populations: the mainland population in the Eurasian continent and the island population in eastern Hokkaido, Japan. We found 11 insertion/deletion (InDel) markers in the genome of the red-crowned crane and designed primer sets across these InDels that can be analyzed with conventional agarose gel electrophoresis. Sixty-six samples of whole blood and skeletal muscle obtained from red-crowned cranes, including 12 families in eastern Hokkaido from 1994 to 2021, showed different patterns in gel images of 11 InDel PCR reactions except for two pairs. The combined non-exclusion probability of the 11 markers indicates that individuals can be determined with a probability of 99.9%. In 39 non-relative chicks, the expected heterozygosity (He) was 0.316, suggesting low genetic diversity. This might not be caused by high levels of inbreeding since the average FIS was not significantly different from zero (0.095, p = 0.075). The results suggest that the 11 InDel primer sets can be used for fairly accurate individual identification as well as genetic population analyses in red-crowned cranes in the island population.

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Distribution of the Red-crowned Crane in the World

Cited by 6 publications

References 4 publications

Metabarcoding of feces and intestinal contents to determine carnivorous diets in red-crowned cranes in eastern Hokkaido, Japan

Metabarcoding of feces and intestinal contents to determine carnivorous diets in red-crowned cranes in eastern Hokkaido, Japan

Origin of a pair of red-crowned cranes (<i>Grus japonensis</i>) found in Sarobetsu Wetland, northwestern Hokkaido, Japan: a possible crossbreeding between the island and the mainland population

Conventional Gel Electrophoresis-Resolvable Insertion/Deletion Markers for Individual Identification and Analysis of Population Genetics in Red-Crowned Cranes in Eastern Hokkaido, Japan

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