title: 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 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.
authors.affiliation: W,M, Keck Science Department, Claremont McKenna College, Pitzer College, and Scripps College, Claremont, CA 91711, USA. lschmitz@kecksci.claremont.edu.
authors.forename: Lars
authors.initials: L
authors.lastname: Schmitz
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Motani
authors.forename: Christopher E
authors.initials: CE
authors.lastname: Oufiero
authors.forename: Christopher H
authors.initials: CH
authors.lastname: Martin
authors.forename: Matthew D
authors.initials: MD
authors.lastname: McGee
authors.forename: Peter C
authors.initials: PC
authors.lastname: Wainwright
mesh_terms: D000818:Animals; D005075:Biological Evolution; D049628:Body Size; D049832:Decapodiformes / Q000033:anatomy & histology* / Q000235:genetics* / Q000502:physiology; D005123:Eye; D009929:Organ Size; D011235:Predatory Behavior; D050661:Sperm Whale; D014785:Vision, Ocular; D014907:Whales