Factors affecting mandarin ducks (Aix galericulata) wintering at dam lakes in the Chugoku district, western Japan.
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- MAHAULPATHA Dharshani
- Graduate School of Biosphere Sciences, Hiroshima University
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- MAHAULPATHA Tharaka
- Graduate School of Biosphere Sciences, Hiroshima University
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- NAKANE Kaneyuki
- Graduate School of Biosphere Sciences, Hiroshima University
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- FUJII Tadashi
- Institute of Biotic Community
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Wintering mandarin duck (Aix galericulata) populations and their behavioural adaptations were analyzed in relation to habitat conditions at six dam lakes in the Chugoku district of western Japan, from September 1999 to March 2000. Mandarin duck densities in the dam lakes were significantly correlated with the shoreline bordered by trees. Mandarin duck densities in the dam lakes were also affected by the decrease in the water level. Overhanging branches and dense vegetation along the shoreline provided mandarin ducks with suitable resting cover and shelter. Receding water levels made resting cover unavailable by exposing these sites. The most notable response to a decline in water level was to move into sites with abundant cover such as those found in pools of the inflow rivers. Since it is practically impossible to maintain constant water levels in dam lakes, we suggest that small adjacent impoundments with sufficient cover should be built to attract mandarin ducks to artificial reservoirs.
収録刊行物
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- 応用生態工学
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応用生態工学 4 (2), 147-152, 2001
応用生態工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679448075264
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- NII論文ID
- 130003642659
- 10013953776
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- NII書誌ID
- AA11528360
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- ISSN
- 18825974
- 13443755
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- NDL書誌ID
- 6029883
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可