Hokkaido University, University of Tsukuba, Tokyo University, Kanazawa University, Lanzhou University, Zhejiang Province Cultural Archeology Research Institute, evidence that cancers of migratory birds were bred at the Tasuiyama Tumulus in Zhejiang Province, China, which is located in the lower reaches of the Changjiang River, about 7,000 years ago. , Found several international research groups by the Zhejiang Museum.The goose that domesticated cancers was thought to have originated in Egypt about 3,500 years ago, but it seems to be a new discovery that overturns that dogma.
According to Hokkaido University and others, the lower reaches of the Yangtze River are wintering grounds for cancers, but they are not breeding grounds.However, among the 232 bones of cancers excavated at the Tasuiyama Tumulus, 4 were found to be young birds that are unlikely to have migrated to wintering areas, and XNUMX were found to be adult birds that had not migrated.
Furthermore, it was presumed that they ate rice cultivated in paddy fields because they had different eating habits from the cancers that had migrated by stable isotope analysis of nitrogen and carbon.Morphologically, it also became clear that the individuals were similar in size, suggesting that they had been isolated from the wild species for several generations.The research group concludes that cancers were bred in the lower Yangtze River basin about 7,000 years ago and were in the early stages of domestication.
Currently, the geese that are bred include the Chinese goose, which is a domesticated swan goose, and the European goose, which is a domesticated greylag goose.
Domestication of birds has been thought to be about 4,000 years ago for chickens and about 3,500 years ago for geese.However, this survey has significantly overturned the conventional wisdom and has shown that the oldest poultry in the world is the goose.
