Electrophysiological evidence for linear polarization sensitivity in the compound eyes of the stomatopod crustacean Gonodactylus chiragra
Contribuinte(s) |
H. Hoppeler |
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Data(s) |
01/01/2006
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Resumo |
Gonodactyloid stomatopod crustaceans possess polarization vision, which enables them to discriminate light of different e-vector angle. Their unusual apposition compound eyes are divided by an equatorial band of six rows of enlarged, structurally modified ommatidia, the mid-band (MB). The rhabdoms of the two most ventral MB rows 5 and 6 are structurally designed for polarization vision. Here we show, with electrophysiological recordings, that the photoreceptors R1-R7 within these two MB rows in Gonodactylus chiragra are highly sensitive to linear polarized light of two orthogonal directions (PS=6.1). They possess a narrow spectral sensitivity peaking at 565 nm. Unexpectedly, photoreceptors within the distal rhabdomal tier of MB row 2 also possess highly sensitive linear polarization receptors, which are in their spectral and polarization characteristics similar to the receptors of MB rows 5 and 6. Photoreceptors R1-R7 within the remainder of the MB exhibit low polarization sensitivity (PS=2.3). Outside the MB, in the two hemispheres, R1-R7 possess medium linear polarization sensitivity (PS=3.8) and a broad spectral sensitivity peaking at around 500 nm, typical for most crustaceans. Throughout the retina the most distally situated UV-sensitive R8 cells are not sensitive to linear polarized light. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Company Of Biologists Ltd |
Palavras-Chave | #Underwater Polarization Vision #Photoreceptor #Compound Eye #Retina #E-vector #Communication #Biology #Mantis Shrimps Crustacea #Retinula Cells #Fish Cyprinidae #S-potentials #Color-vision #Light #Photoreceptors #Lamina #Hoplocarida #C1 #270502 Neurobiology #780105 Biological sciences |
Tipo |
Journal Article |