Influence of photic environment on the form of the fish electroretinographic off-response.
Scotopic electroretinogram of dogfish shark (Scylliorhinus canicula) and eel (Anguilla anguilla) is characterized by a negative off-response, changing in sign under photopic condition. It increased under the effect of increased background illumination, but its amplitude never exceeded that of the b-wave. On the other hand, dark-adapted electroretinograms of two perch-like species, perch (Perca fluviatilis) and painted comber (Serranus scriba), exhibited a positive off-wave, exceeding the b-wave amplitude under bright photopic conditions.
Gacić
Zoran
Z
Center for Multidisciplinary Studies, University of Belgrade, Serbia and Montenegro. zorga@ibiss.bg.ac.yu
Damjanović
Ilija
I
Konjević
Djordje
D
Bajić
Aleksandar
A
Milosević
Milena
M
Andjus
Pavle R
PR
Micković
Branislav
B
Andjus
Radoslav K
RK
D000221:Adaptation, Ocular / Q000502:physiology*; D000818:Animals; D003623:Dark Adaptation / Q000502:physiology; D004284:Dogfish / Q000502:physiology*; D004524:Eels / Q000502:physiology*; D004596:Electroretinography; D005399:Fishes; D008029:Lighting; D010775:Photic Stimulation; D012684:Sensory Thresholds / Q000502:physiology