Factors affecting swan migration in Miyagi Prefecture
2019 Volume 13 Pages 37-43
Details
2019 Volume 13 Pages 37-43
Timing of migration in relation to environmental factors (weather conditions: temperature and snowfall, and artificial feeding) were investigated for swans wintering in Miyagi prefecture, northern Japan, during 15 years (2000/01–2014/15). The average numbers of swans were 3,870 in November, 13,057 in January and 3,230 in March, respectively. Results of GLMM (generalized linear mixed model) analysis indicated that increasing snowfall in December increased the number of swans in autumn migration (November to January). Decreasing snowfall in February, however, resulted in a decrease in the number in swans from January to March.
