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. 2014 Oct 17;3(11):1063–1070. doi: 10.1242/bio.20149894

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© 2014. Published by The Company of Biologists Ltd

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.

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Fig. 4. — Proportion of squid that (a) produced ink as a defensive mechanism, (b) chose a defensive “anchor” posture or jet response, (c) displayed various body patterns in response to a visual startle stimulus from three CO₂ treatment levels: control (447 µatm), moderate (626 µatm), or high (956 µatm). Sample sizes are displayed above the bars.