Potential enhanced ability of giant squid to detect sperm whales is an exaptation tied to their large body size

Abstract It has been hypothesized that sperm whale predation is the driver of eye size evolution in giant squid. Given that the eyes of giant squid have the size expected for a squid this big, it is likely that any enhanced ability of giant squid to detect whales is an exaptation tied to their body...

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Bibliographic Details
Main Authors: Schmitz, Lars, Motani, Ryosuke, Oufiero, Christopher E, Martin, Christopher H, McGee, Matthew D, Wainwright, Peter C
Format: Other/Unknown Material
Language:English
Published: BioMed Central Ltd. 2013
Subjects:
Giant squid
Sperm whale
Eye size
Optical function
Scaling
Allometry
Adaptation
Exaptation
Online Access:http://www.biomedcentral.com/1471-2148/13/226
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Summary:Abstract It has been hypothesized that sperm whale predation is the driver of eye size evolution in giant squid. Given that the eyes of giant squid have the size expected for a squid this big, it is likely that any enhanced ability of giant squid to detect whales is an exaptation tied to their body size. Future studies should target the mechanism behind the evolution of large body size, not eye size. Reconstructions of the evolutionary history of selective regime, eye size, optical performance, and body size will improve the understanding of the evolution of large eyes in large ocean animals.

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