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- W2316002197 abstract "Fiddler crabs are intertidal brachyuran crabs that belong to the genus Uca. Approximately 97 different species have been identified, and several of these live sympatrically. Many have species-specific body color patterns that may act as signals for intra- and interspecific communication. To understand the behavioral and ecological role of this coloration we must know whether fiddler crabs have the physiological capacity to perceive color cues. Using a molecular approach, we identified the opsin-encoding genes and determined their expression patterns across the eye of the sand fiddler crab, Uca pugilator. We identified three different opsin-encoding genes (UpRh1, UpRh2 and UpRh3). UpRh1 and UpRh2 are highly related and have similarities in their amino acid sequences to other arthropod long- and medium-wavelength-sensitive opsins, whereas UpRh3 is similar to other arthropod UV-sensitive opsins. All three opsins are expressed in each ommatidium, in an opsin-specific pattern. UpRh3 is present only in the R8 photoreceptor cell, whereas UpRh1 and UpRh2 are present in the R1-7 cells, with UpRh1 expression restricted to five cells and UpRh2 expression present in three cells. Thus, one photoreceptor in every ommatidium expresses both UpRh1 and UpRh2, providing another example of sensory receptor coexpression. These results show that U. pugilator has the basic molecular machinery for color perception, perhaps even trichromatic vision." @default.
- W2316002197 created "2016-06-24" @default.
- W2316002197 creator A5013122328 @default.
- W2316002197 creator A5027632899 @default.
- W2316002197 creator A5033712809 @default.
- W2316002197 creator A5070800925 @default.
- W2316002197 date "2010-12-15" @default.
- W2316002197 modified "2023-10-16" @default.
- W2316002197 title "Molecular evidence for color discrimination in the Atlantic sand fiddler crab, <i>Uca pugilator</i>" @default.
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- W2316002197 doi "https://doi.org/10.1242/jeb.051011" @default.
- W2316002197 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4074279" @default.
- W2316002197 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21113005" @default.
- W2316002197 hasPublicationYear "2010" @default.
- W2316002197 type Work @default.