LED 광원에 대한 암소시 볼락 (Sebastes inermis)의 시각 스펙트럼 민감도

Abstract

The characteristics of aquatic light fields are generally reflected in the visual systems of fishes inhabiting them. Therefore, research on light sensitivity of fish is useful to explain the correlation between visual function and habitat, behavior and distribution of fish. Rockfish are important species in coastal ecology and also one of the main species for aquiculture. To maintain resources and understand ecology of rockfish, a spectral sensitivity of scotopic rockfish in the range of visible light (405~660 nm) was investigated using light-emitting diodes (LEDs). In order to assess electrophysiological response of fish, an electroretinogram (ERG) of the dark-adapted eyes of rockfish was recorded. The juvenile (n=5, W: 20.3±5.2 g, TL: 10.3±0.7 cm) and adult (n=5, W: 87.8±21.8 g, TL: 18.1±1.3 cm) rockfish were used in experiment. The visual threshold of juvenile and adult rockfish were each 11.66 (log quanta/cm²/s) and 11.81 (log quanta/cm²/s) in 574 nm, respectively. Peak wavelength of the spectral sensitivity in the dark-adapted juvenile and adult rockfish were 551 nm (green). Collectively, these results demonstrate that the rockfish has suitable visual capabilities for inhabiting coastal water.