2023 Volume 13 Pages 57-63
This study aimed to investigate the time-activity budgets of wintering Bean geese Anser fabalis middendorffii in Katano-kamoike, which is a Ramsar site in Kaga City, Ishikawa Prefecture. Resting was the dominant activity, followed by foraging; other activities were uncommon. Generalized linear mixed models were constructed to investigate the effects of season (the number of days since December 1st), time of day, water level in Katano-kamoike, air temperature, amount of precipitation, amount of snowfall, snow depth, and wind speed on the number of foraging Bean geese. The number of foraging Bean geese was negatively affected by the water level, snowfall, and season but positively affected by the time of day and snow depth. When the foraging grounds of wintering Bean geese are covered by snow, the value of Katano-kamoike as a foraging site is more important especially when the snow depth is deep. Therefore, for the conservation of wintering Bean geese, appropriate management of the water level in Katano-kamoike is very important.
