比威克天鹅觅食稻田残茬的特征

Q4 Agricultural and Biological Sciences

Journal of the Yamashina Institute for Ornithology Pub Date : 2018-02-28 DOI:10.3312/JYIO.49.53

Tomokazu Watanabe, Hironobu Tajiri

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引用次数: 0

摘要

在新泻县越后平原坂田湖附近西关原地区的一处水稻田区，研究了比威克天鹅(Bewick’s Swans)利用残茬觅食的条件。比威克天鹅(Cygnus columbianus)是比威克天鹅(Bewick’s Swans)大量过冬的地方。2003年11月23日和12月21日以及2004年1月12日和2月15日进行了实地观测。在植被覆盖度低、散落稻草覆盖度高的未耕土地上，天鹅似乎会选择残茬。

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Features of Stubble of Rice Fields Used for Foraging by Bewick's Swans

We investigated conditions of stubble used by Bewickʼs Swans Cygnus columbianus for foraging at a rice Oryza sativa field zone of Nishikanbara area near Lake Sakata in Echigo Plain in Niigata Prefecture, where many Bewickʼs Swans winter. Field observations were conducted on 23th November and 21th December 2003, and 12th January and 15th February 2004. Swans seemed to select stubble on unplowed land where the degree of vegetation cover was low and the cover degree of scattered rice straw was high.

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来源期刊

Journal of the Yamashina Institute for Ornithology Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

0.20

自引率

0.00%

发文量