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

Visual spectral sensitivity of dark-adapted rockfish (Sebastes inermis) in LED light source

  • 허민아 (부경대학교 수산물리학과) ;
  • 강경미 (KOICA-PKNU국제수산과학협동과정) ;
  • 신현옥 (부경대학교 해양생산시스템관리학부)
  • Heo, Min-A (Department of Fisheries Physics, Graduate School, Pukyong National University) ;
  • Kang, Gyeong-Mi (KOICA-PKNU International Graduate Program of Fisheries Science) ;
  • Shin, Hyeon-Ok (Division of Marine Production System Management, Pukyong National University)
  • 투고 : 2015.01.29
  • 심사 : 2015.02.24
  • 발행 : 2015.02.28

초록

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 the visual function and habitat, behavior and distribution of fish. Rockfish is an important species in coastal ecology and also one of the main species for culturing in Korea. To make a contribution on the maintenance of the fish resources and understanding the ecology of the rockfish, the visual spectral sensitivities of the dark-adapted rockfishes were measured in the range of visible light (405~660 nm) using a light source of light-emitting diodes (LEDs). In order to assess electrophysiological response of the fish, the ERGs (electroretinograms) of the dark-adapted rockfishes were recorded on a data logger (12 bits) and a laptop computer. Juvenile (n=5; weight: $20.3{\pm}5.2g$; total length: $10.3{\pm}0.7cm$) and adult (n=5; weight: $87.8{\pm}21.8g$; total length: $18.1{\pm}1.3cm$) rockfishes were used in experiment. The visual threshold of juvenile and adult rockfish were 11.66 (log quanta/$cm^2/s$) and 11.81 (log quanta/$cm^2/s$) in 574 nm, respectively. The peak wavelength of the spectral sensitivity in the dark-adapted juvenile and adult rockfish was commonly 551 nm (series of green color). Collectively, these results demonstrate that the rockfish has suitable visual capabilities for inhabiting coastal water in Korea.

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