Massive Loss of Olfactory Receptors But Not Trace Amine-Associated Receptors in the World's Deepest-Living Fish (Pseudoliparis swirei).

ABSTRACT: Olfactory receptor repertoires show highly dynamic evolution associated with ecological adaptations in different species. The Mariana snailfish (Pseudoliparis swirei) living below a depth of 6000 m in the Mariana Trench evolved degraded vision and occupies a specific feeding habitat in a dark, low-food environment. However, whether such adaptations involve adaptive changes in the chemosensory receptor repertoire is not known. Here, we conducted a comparative analysis of the olfactory receptor (OR) and trace amine-associated receptor (TAAR) gene repertoires in nine teleosts with a focus on the evolutionary divergence between the Mariana snailfish and its shallow-sea relative, Tanaka's snailfish (Liparis tanakae). We found many fewer functional OR genes and a significantly high

SUBMITTER: Jiang H 

PROVIDER: S-EPMC6895882 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature