Visual perception and camouflage response to 3D backgrounds and cast shadows in the European cuttlefish, Sepia officinalis.

The Journal of Experimental Biology
Aliya El NagarSteven M Sait

Abstract

To conceal themselves on the seafloor, European cuttlefish, Sepia officinalis, express a large repertoire of body patterns. Scenes with 3D relief are especially challenging because it is not possible either to directly recover visual depth from the 2D retinal image or for the cuttlefish to alter its body shape to resemble nearby objects. Here, we characterised cuttlefish camouflage responses to 3D relief, and to cast shadows, which are complementary depth cues. Animals were recorded in the presence of cylindrical objects of fixed (15 mm) diameter, but varying in height, greyscale and strength of cast shadows, and to corresponding 2D pictorial images. With the cylinders, the cuttlefish expressed a '3D' body pattern, which is distinct from previously described Uniform, Mottle and Disruptive camouflage patterns. This pattern was insensitive to variation in object height, contrast and cast shadow, except when shadows were most pronounced, in which case the body patterns resembled those used on the 2D backgrounds. This suggests that stationary cast shadows are not used as visual depth cues by cuttlefish, and that rather than directly matching the 2D retinal image, the camouflage response is a two-stage process whereby the animal fir...Continue Reading

References

Oct 19, 1976·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·D Marr
Apr 1, 1968·Animal Behaviour·J B Messenger
Nov 12, 2003·Animal Cognition·Tomoko Imura, Masaki Tomonaga
Apr 19, 2006·Perception & Psychophysics·Albert Yonas, Carl E Granrud
Apr 20, 2006·Perception·Ulrike Aust, Ludwig Huber
Mar 21, 2007·The Journal of Experimental Biology·Alexandra BarbosaRoger T Hanlon
Apr 12, 2007·The American Naturalist·Roger T HanlonJoy McKechnie
May 21, 2008·The Journal of Experimental Biology·Emma J KelmanRoland J Baddeley
Nov 8, 2008·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·S ZylinskiA J Shohet
Jan 9, 2010·Journal of Vision·Sarah ZylinskiAdam J Shohet
Jan 19, 2012·Journal of Experimental Psychology. Animal Behavior Processes·Robert G CookAaron P Blaisdell
Jan 15, 2020·Science Advances·R C FeordTrevor J Wardill

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