克羅原則（Krogh's principle）是生物學中的一個原則，指對大多數問題，總會有某種動物最適合於這一問題的研究。這一原則在依賴比較方法的領域，如神經行為學、比較生理學、功能基因組學等中，都有廣泛的應用。
克羅原則是以丹麥生理學家、諾貝爾獎得主奧古斯特·克羅的名字命名的。1975年，另一諾貝爾獎得主、生物化學家漢斯·阿道夫·克雷布斯最早使用了這一術語。
參考文獻
- Bennett AF (2003). Experimental evolution and the Krogh Principle: generating biological novelty for functional and genetic analyses. Physiological and Biochemical Zoology 76:1-11. PDF（頁面存檔備份，存於互聯網檔案館）
- Burggren WW (1999/2000). Developmental physiology, animal models, and the August Krogh principle. Zoology 102:148-156.
- Chien A, Edgar DB, Trela JM (1976). "Deoxyribonucleic acid polymerase from the extreme thermophile Thermus aquaticus". J. Bacteriol 174: 1550-1557
- Crawford, DL (2001). "Functional genomics does not have to be limited to a few select organisms". Genome Biology 2(1):interactions1001.1-1001.2.
- Krebs HA (1975). The August Krogh principle: "For many problems there is an animal on which it can be most conveniently studied." Journal of Experimental Zoology 194:221-226.
- Krogh A (1929). The progress of physiology. American Journal of Physiology 90:243-251.
- "Krogh's principle for a new era." (2003) [Editorial] Nature Genetics 34(4) pp. 345-346.
- Miller G. (2004) Behavioral Neuroscience Uncaged. Science 306(5695):432-434.
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