Nile crocodile (Crocodylus niloticus)

Containing taxa: Animalia » Chordata » Osteichthyes » Sarcopterygii » Tetrapoda » Diapsida » Archosauria » Crocodylomorpha

Photoreceptors:
Receptor Opsin λmax Filter λmax Filter λ50% Recep. λmax
Double cone principal527nm  527nm
Green cone507nm  507nm
Rod507nm  507nm
Blue cone425nm  430nm


Opponent processes:
Description (+) Terminus (-) Terminus Mode
Luminance (photopic)
Double cone principal   Photopic
Luminance (scotopic)
Rod   Scotopic
Double-Single cones
563nm - 523nm - 481nm
 
Double cone principal Green cone Photopic
Green-Indigo
513nm - 468nm - 425nm
 
Green cone Blue cone Photopic

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Notes and References:

No data are available for blue cones (if present) or rods, so these are extrapolated from other Crocodylus species.

Nagloo N, Collin SP, Hemmi JM, Hart NS (2016) Spatial resolving power and spectral sensitivity of the saltwater crocodile, Crocodylus porosus, and the freshwater crocodile, Crocodylus johnstoni. Journal of Experimental Biology 219: 1394-1404; doi:10.1242/jeb.135673

Warrant E.J., Nilsson D.-E. (1998) Absorption of White Light in Photoreceptors. Vision Res., Vol. 38, No. 2, pp. 195-207. PII: S0042-6989(97)00151-X

Stavenga D., Smits R.P., Hoenders B.J. (1993) Simple Exponential Functions Describing the Absorbance Bands of Visual Pigment Spectra. Vision Res. 33(8) pp. 1011-1017. doi:10.1016/0042-6989(93)90237-Q



Note: Many species may have gaps in available data, which may be filled in with extrapolations from closely related species. The AVIAN website is copyright © 2011-2024 J. Gagnon. All rights reserved unless otherwise specified.