Spectral sensitivity of the dogfish shark (Scyliorhinus canicula)

Abstract

The action spectrum of the electroretinographic (ERG) b-wave and the unmasked late receptor potential (LRP) were measured under a variety of conditions (isolated eyecup, detached retina, b-wave recording in fresh preparations, LRP measurements after low-temperature aging, dark and light adaptation). It was shown that in the dogfish, Scyliorhinus canicula (L.), eyecup spectral sensitivity matched closely the pigment 502 spectral curve like other rhodopsin-possessing marine species. The ERG b-wave is as good an indicator of spectral sensitivity as the unmasked LRP that directly reflects the responsiveness of photoreceptors. Differences in spectral sensitivity were not revealed between dogfish preparations studied under a variety of conditions (isolated eyecup vs. detached retina; b-wave recording in fresh preparations vs. LRP measurements after low-temperature aging; dark vs. light adaptation). We developed a new model for spectral sensitivity data.

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Acknowledgements

Supported by grant #143045 of the Serbian Ministry of Science and Environmental Protection.

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Correspondence to Z. Gačić.

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Gačić, Z., Damjanović, I., Mićković, B. et al. Spectral sensitivity of the dogfish shark (Scyliorhinus canicula). Fish Physiol Biochem 33, 21 (2007). https://doi.org/10.1007/s10695-006-9113-6

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Keywords

  • Dogfish
  • LRP
  • Spectral sensitivity