Synergetic Effects of Light Spectrum and Temperature on Oxygen Consumption Rate of Juvenile Percocypris pingi
Light and temperature have a profound impact on the growth,metabolism and locomotion of fish.In order to study the synergistic effect of light spectrum and temperature on fish metabolism,the routine oxygen consumption rate(RMR)of juvenile perch carp(Percocypris pingi)was measured at the temperature of 15℃and 20℃under red(R),yellow(Y),green(G)and white(W)LED spectrum(as well as covering and natural light)(light intensity≤100 lx),respec-tively.The results showed that the RMRs of fish in different spectrum groups were significantly different(P<0.05).At 15 oC and 20 oC,the sequence of RMR was R>Y>G>W>natural light>covering,and R>G>natural light>Y>W>covering,respectively.The RMR of R group was significantly higher than that of other groups(P<0.05),and the RMR of covering group was significantly lower than that of other groups(P<0.05).The RMRs under R,G,Y,and W LED spectrum,cov-ering,and natural light groups,increased by 27.94%,34.88%,17.33%,33.39%,40.63%and 62.06%with the tem-perature increasing from 15℃to 20℃,respectively.The temperature sensitivity coefficient(Q10)of RMR decreased un-der covering and different LED spectrum groups,and the sequence of Q10 was control>covering>G>W>R>Y.The tem-perature sensitivity of the juveniles decreased at different light spectrum exposures(specially,the yellow light).The study provides basic data for the metabolic characteristics of P.pingi under different light spectrum and temperatures,and the ref-erence for the control of artificial breeding light environment.
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