Shortwave light filtration effect on spectral sensitivity of two shrimp populations of M. relicta (Mysida)

Increasing the illumination slowly over several weeks protects against light damage in the eyes of the crustacean Mysis relicta

“…Faster cycling might be linked to changes in the amount or composition of proximal screening pigments or intrinsic properties of the membrane. Some screening pigments have photoprotective activity (Abu Khamidakh et al, 2010;Insausti et al, 2013) and membrane properties are universally regulated by changing lipid composition (see below). It may further be noted that polyunsaturated fatty acids formed as part of the phototransduction reactions have been shown to enhance excitation in Drosophila (Chyb et al, 1999).…”

“…However, Feldman et al (2008) found that the total antioxidant activity was similar in the eyes of both populations. The concentrations as well as composition of screening pigments vary between L p and S p (Abu Khamidakh et al, 2010), but optical screening preventing light from reaching photoreceptors cannot, per se, be a useful protective strategy in dark-adapted eyes of animals that need to maximize sensitivity. A later study by Feldman et al (2010) shifted interest to differences in factors that may sensitize eyes to light damage.…”

Molecular physiology of visual pigment rhodopsin

“…As we showed, the absorption maximums of these shrimps' rhodopsins are different: 530 nm in rhodopsin of the marine shrimp living at relatively high light intensity and 560 nm in the one of the lake shrimp living at high depth. This difference is caused not by amino acid OSTROVSKY substitution but very possible by substitution of retinal 1 with retinal 2 [16][17][18][19].…”