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Text
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URL Address
<a href="http://doi.org/10.1007/s00114-012-0918-0" target="_blank" rel="noreferrer noopener">http://doi.org/10.1007/s00114-012-0918-0</a>
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Pages
443-448
Issue
6
Volume
99
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Title
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Adaptations for marine habitat and the effect of Triassic and Jurassic predator pressure on development of decompression syndrome in ichthyosaurs
Publisher
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Naturwissenschaften
Date
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2012
2012-06
Subject
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body; Caisson disease; deep; endothermy; evolution; Ichthyosaurs; oxygen; red muscle; reptiles; Science & Technology - Other Topics; swimming speed; thunnus-thynnus; Triassic; tuna katsuwonus-pelamis
Creator
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Rothschild B M; Xiaoting Z; Martin L D
Description
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Decompression syndrome (caisson disease or the "the bends") resulting in avascular necrosis has been documented in mosasaurs, sauropterygians, ichthyosaurs, and turtles from the Middle Jurassic to Late Cretaceous, but it was unclear that this disease occurred as far back as the Triassic. We have examined a large Triassic sample of ichthyosaurs and compared it with an equally large post-Triassic sample. Avascular necrosis was observed in over 15 % of Late Middle Jurassic to Cretaceous ichthyosaurs with the highest occurrence (18 %) in the Early Cretaceous, but was rare or absent in geologically older specimens. Triassic reptiles that dive were either physiologically protected, or rapid changes of their position in the water column rare and insignificant enough to prevent being recorded in the skeleton. Emergency surfacing due to a threat from an underwater predator may be the most important cause of avascular necrosis for air-breathing divers, with relative frequency of such events documented in the skeleton. Diving in the Triassic appears to have been a "leisurely" behavior until the evolution of large predators in the Late Jurassic that forced sudden depth alterations contributed to a higher occurrence of bends.
Identifier
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<a href="http://doi.org/10.1007/s00114-012-0918-0" target="_blank" rel="noreferrer noopener">10.1007/s00114-012-0918-0</a>
Format
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Journal Article
2012
body
Caisson disease
deep
endothermy
Evolution
Ichthyosaurs
Journal Article
Martin L D
Naturwissenschaften
Oxygen
red muscle
Reptiles
Rothschild B M
Science & Technology - Other Topics
swimming speed
thunnus-thynnus
Triassic
tuna katsuwonus-pelamis
Xiaoting Z