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Osteological correlates and phylogenetic analysis of deep diving in living and extinct pinnipeds: What good are big eyes?

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dc.contributor.author Debey, Lauren B. en
dc.contributor.author Pyenson, Nicholas D. en
dc.date.accessioned 2014-02-26T20:49:21Z
dc.date.available 2014-02-26T20:49:21Z
dc.date.issued 2013
dc.identifier.citation Debey, Lauren B. and Pyenson, Nicholas D. 2013. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F21912">Osteological correlates and phylogenetic analysis of deep diving in living and extinct pinnipeds: What good are big eyes?</a>." <em>Marine Mammal Science</em>. 29 (1):48&ndash;83. <a href="https://doi.org/10.1111/j.1748-7692.2011.00545.x">https://doi.org/10.1111/j.1748-7692.2011.00545.x</a> en
dc.identifier.issn 1748-7692
dc.identifier.uri http://hdl.handle.net/10088/21912
dc.description.abstract Marine tetrapods have evolved different sensory solutions to meet the ecological challenges of foraging at depth. It has been proposed that pinipeds, like ichthyosaurs, evolved large eyeballs for such demands. Here, we test this hypothesis using morphological and diving data from a comprehensive data set (n= 54 species; 435 individual specimens), including living and extinct pinnipeds and other select carnivorans as outgroup taxa. We used bony orbit size as a proxy for eyeball size, and recorded associated skull measurements to control for relative changes in orbit size; for diving depth, we used the deepest dive depth reported in the literature. Our analyses included both standard regressions and those corrected for phylogeny (i.e., independent contrasts). Standard regression statistics showed orbit size was a significantly good predictor of diving depth for phocids and for pinnipeds overall, although there was no correlation for otariids. In contrast, independent contrasts showed little support for a relationship between orbit size and diving depth for any group broader than family level, although this approach did demonstrate deep diving has evolved multiple times in crown Pinnipedia. Lastly, using select fossil taxa, we highlight the need to test adaptive hypotheses using comparative data in an evolutionary context. en
dc.relation.ispartof Marine Mammal Science en
dc.title Osteological correlates and phylogenetic analysis of deep diving in living and extinct pinnipeds: What good are big eyes? en
dc.type Journal Article en
dc.identifier.srbnumber 111350
dc.identifier.doi 10.1111/j.1748-7692.2011.00545.x
rft.jtitle Marine Mammal Science
rft.volume 29
rft.issue 1
rft.spage 48
rft.epage 83
dc.description.SIUnit NH-Paleobiology en
dc.description.SIUnit NMNH en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 48
dc.citation.epage 83


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