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Science 12 March 1976:
Vol. 191. no. 4231, pp. 1046 - 1048
DOI: 10.1126/science.1251214
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Articles

Science, Vol 191, Issue 4231, 1046-1048
Copyright © 1976 by American Association for the Advancement of Science

articles

Bioluminescent countershading in midwater animals: evidence from living squid

RE Young and CF Roper

Midwater squid respond to overhead illumination by turning on numerous downward-directed photophores; they turn off the photophores when overhead illumination is eliminated. The squid are invisible when the intensity of the photophores matches the intensity of the overhead illumination. These results strongly support the theory of ventral bioluminescent countershading.


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From Abbott Thayer to the present day: what have we learned about the function of countershading?.
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