Effects of Lighting Spectrum and Disturbance Level on the Growth and Stress Responses of Yellow Perch Perca flavescens

摘要: .— We evaluated the effects of different lighting spectra and routine disturbances on growth stress responses yellow perch Perca, flavescens. Fish were reared in tanks under one three spectra: blue (405–530 nm), red (600–750 nm). or full spectrum (380–750 For each spectrum, fish two disturbance levels: which exposed to 2–4 daily typify intensive tank culture conditions (e.g., casting shadows over tank, sham siphoning, dissolved oxygen measurement: ‘disturbed’). a second treatment such minimized (‘undisturbed’). The for 87 d temperature, photoperiod. feeding near optimal perch. cortisol response groups was by measuring baseline serum levels days 0, 1,3, 21, 30 min after application an acute handling stressor 1, 3. Treatment measured from 21–86 study. On day 87, various organs parameters compare health condition treatments. Disturbed gained less weight length, had significantly lower factor than undisturbed fish. Additionally, disturbed showed no signs acclimation frequent disturbances. light more length those light. Frequent greater negative effect gain other but not days, higher Undisturbed mesentery fat Our results demonstrate that can be affected level conditions. These factors should taken into consideration when developing strategies maximize