2011
DOI: 10.2744/ccb-0914.1
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Olfactory Receptor Genes in Terrestrial, Freshwater, and Sea Turtles: Evidence for a Reduction in the Number of Functional Genes in Aquatic Species

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Cited by 9 publications
(11 citation statements)
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“…Interestingly, species that returned to aquatic habits tend to lose olfactory functions. This has been reported in aquatic turtles, which show a reduction in functional OR genes as compared with terrestrial species (Vieyra, 2011). Similarly, sea snakes have less OR functional genes than terrestrial snakes; this genetic deterioration is more pronounced in viviparous than oviparous sea snakes, as laying eggs on land might rely more on a keen sense of smell than underwater delivery of alive newborns (Kishida and Hikida, 2010).…”
Section: Evolutionary Perspectives: Phylogenetic Interactions Under Csupporting
confidence: 62%
“…Interestingly, species that returned to aquatic habits tend to lose olfactory functions. This has been reported in aquatic turtles, which show a reduction in functional OR genes as compared with terrestrial species (Vieyra, 2011). Similarly, sea snakes have less OR functional genes than terrestrial snakes; this genetic deterioration is more pronounced in viviparous than oviparous sea snakes, as laying eggs on land might rely more on a keen sense of smell than underwater delivery of alive newborns (Kishida and Hikida, 2010).…”
Section: Evolutionary Perspectives: Phylogenetic Interactions Under Csupporting
confidence: 62%
“…Sea turtles orient to magnetic fields and to a map-like representation of such fields, adjusting their heading in response to simulated ocean locations in the laboratory (66,67). In the field, sea turtles may also use windborne odorants to locate their natal beach by orienting upwind (68), but as secondarily aquatic vertebrates, sea turtles have a smaller relative OB size and fewer OR genes than land turtles (69). Thus, living and extinct reptiles appear to show predictable heterogeneity and plasticity in the components of the OS system, in concordance with the OS hypothesis.…”
Section: Reptilesmentioning
confidence: 99%
“…secretory) and in some cases hyper-developed MGs. Adaptation to terrestrial life coerces changes in the structure and composition of secre- www.nature.com/scientificreports/ tory organs, as well as chemosensory receptors 32,[52][53][54] . A quantitative comparison of MG secretions, as well as olfactory receptor diversity between aquatic and terrestrial turtle species, is warranted.…”
Section: Discussionmentioning
confidence: 99%
“…chelonians) possess a large repertory of olfactory receptor genes that is comparable to, or even higher than, that of mammals 30 . Both olfactory and vomeronasal senses are well developed in turtles 31 and the relative importance of either of these may be determined by the extent of aquatic habitat use 32 . In particular, the proportion of functional olfactory receptor genes was shown to be lower in aquatic turtles than in terrestrial species, suggesting that volatile olfactory cues are less important in water than on land 32 .…”
Section: Introductionmentioning
confidence: 99%
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