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. 2014 Feb 19;369(1636):20130038. doi: 10.1098/rstb.2013.0038

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© 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 7. — Visual range of a hypothetical prey/predator pair plotted as visibility bubbles at two different depths (120 and 195 m in coastal water during the day) with visual range at the same scale on both axes. The vertical axis also gives the actual depth in the sea. The predator is assumed to have an 8 mm pupil diameter and is viewing prey animals (which are 1 cm wide) and conspecifics (which are 10 cm wide). The prey is modelled with a pupil diameter of 2 mm viewing 10 cm wide predators, and 1 cm wide conspecifics as well as bioluminescent point sources emitting 10¹¹ quanta s⁻¹.