Range-finding in squid using retinal deformation and image blur

Chung, Wen-Sung and Marshall, Justin (2014) Range-finding in squid using retinal deformation and image blur. Current Biology, 24 2: R64-R65. doi:10.1016/j.cub.2013.11.058


Author Chung, Wen-Sung
Marshall, Justin
Title Range-finding in squid using retinal deformation and image blur
Journal name Current Biology   Check publisher's open access policy
ISSN 0960-9822
1879-0445
Publication date 2014-01-20
Sub-type Article (original research)
DOI 10.1016/j.cub.2013.11.058
Open Access Status
Volume 24
Issue 2
Start page R64
End page R65
Total pages 2
Place of publication Cambridge, MA, United States
Publisher Cell Press
Collection year 2015
Language eng
Formatted abstract
Squid and other cephalopods catch prey with remarkable speed and precision. Before the strike occurs, they encounter the difficult task of judging an object’s distance and size in the contrast-poor world of the mid-water environment. Here we describe a solution to this common problem underwater, where a large portion of a squid’s dorso-temporal retina is intentionally blurred. This apparently counter-adaptive ‘retinal bump’ is combined with a vertical bobbing behavior that scans objects of interest from focused to defocused retinal regions. The image focus differential changes sharply at precisely the distance equivalent to tentacle length and enables the squid, Sepioteuthis lessoniana, to capture prey. This unique range-finding mechanism is an adaptation to hunting, defense, and object size identification in an environment where the depth cues found on land are less reliable.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 4 times in Scopus Article | Citations
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Created: Mon, 31 Mar 2014, 09:10:46 EST by Debra McMurtrie on behalf of Queensland Brain Institute