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

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. Fut...

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Bibliographic Details
Published in:BMC Evolutionary Biology
Main Authors: Schmitz, Lars, Motani, Ryosuke, Oufiero, Christopher E, Martin, Christopher H, McGee, Matthew D, Wainwright, Peter C
Format: Text
Language:English
Published: BioMed Central 2013
Subjects:
Correspondence
Sperm whale
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3852725
http://www.ncbi.nlm.nih.gov/pubmed/24127991
https://doi.org/10.1186/1471-2148-13-226
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Summary: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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