Seasonal variation

Japanese: 季節変異 - きせついへん
Seasonal variation

…In northern lakes and ponds, Daphnia and Bosmina are known to undergo certain morphological changes depending on the season. This is called cyclomorphism. It is thought that this phenomenon is an adaptation to the changes in water density caused by seasonal changes in temperature.

*Some of the terms mentioned in "seasonal variations" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…北方の地にある湖沼では,ミジンコDaphnia,ゾウミジンコBosminaなどには,季節によって一定の形態変化が見られることが知られている。これを形態輪廻(季節変異)cyclomorphosisという。この現象は季節による気温の変化で生ずる水の密度変化に対する適応現象と考えられている。…

※「季節変異」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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