Population dynamics of red-crowned cranes in Hokkaido since the 1950s

  • Published source details Masatomi H. (1991) Population dynamics of red-crowned cranes in Hokkaido since the 1950s. Proceedings of the 1987 International Crane Workshop International Crane Foundation, Baraboo, Wisconsin, USA, 297-299.


This study is summarised as evidence for the following.

Action Category

Provide supplementary food for cranes to increase adult survival

Action Link
Bird Conservation
  1. Provide supplementary food for cranes to increase adult survival

    A before-and-after study of red-crowned cranes Grus japonensis in Hokkaido, Japan, in the mid-20th century (Masatomi 1991) found that a local population increased from 42 individuals in 1952-4 to 161 in 1960-4. This followed the establishment of an artificial feeding station in 1952, and the author attributes the population rise to supplementary food reducing winter mortality, although no data is provided for the use of the feeding station, any reduction in starvation or increase in reproductive productivity. No details are provided about the supplementary food provided.


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