水生态学杂志Issue(3)：66-71,6.DOI:10.15928/j.1674-3075.2015.03.011
鳙对光色和光强的选择性试验
Effect of Light Color and Intensity for Attracting Aristichthys nobilis
摘要
Abstract
Ship locks, connecting the channel segments upstream and downstream of a dam , have the best potential for fish passage .Some researchers have suggested that the passage efficiency of the ship lock could be improved by using a behavior guidance system designed according to the phototaxis or phonotaxis of the target fish species .In this study , we explored the effect of light color and intensity for attracting Aristichthys nobilis in a test device mod-eled on the Gezhouba Ship lock and based on phototaxis .The aim of the study is to improve the fish passage tech-nology of ship locks .Five light colors ( red, blue, green, yellow and white ) and five different light intensities ( Zone 1:dark zone;Zone 2-4:light zones;Zone 5:strong light zone ) were used in the investigation .Two hun-dred test fish with an average body length of (12.8 ±1.6) cm and body mass of (34.25 ±2.75) g were main-tained in a tank at temperature 20℃, pH 7.5 and DO 7.8 mg/L.30 A.nobilis were selected for each experiment and the distribution of A.nobilis was recorded using a high definition camera at 3 min intervals.The experiment was conducted from 22 ∶00-06 ∶00;each test lasted for 2 hr and tests repeated three times .Results indicate that A. nobilis displays an obvious preference for red light .The percentage of fish found in areas of red , blue, green, yellow and white lighting were, respectively, (68.01 ±7.09)%, (3.24 ±2.04)%, (5.7 ±4.28)%, (7.76 ± 2.19)%and (15.30 ±2.83)%.In the red light area, the occurrence percentage of A.nobilis decreased initially and then increased , with the minimum value (46.17%) at 60min.The occurrence percentage under red lighting varied significantly with time (28.16%between the maximum and minimum ).Fish occurrence in the white light area also increased initially and then decreased , with a maximum percentage of 28.83% and range of 16.83%. The percentage occurrences of fish observed in the yellow and green light areas displayed little variation over time , with a range of 4.66%.The fish number in the blue light area fluctuated smoothly up and down , with a range of 11.35%.A.nobilis showed obvious negative phototaxis to green and yellow light and an obvious positive phototaxis to the red light .As to the effect of green light intensity , there was little difference in the occurrence percentage of A.nobilis between the light zone and strong light zone , but the percentage ( 75 .58%) was significantly higher in the dark zone (P<0.05).The number of fish in the dark zone displayed a decreasing trend over time but it was not significant .Under red light, the occurrence percentage of A.nobilis increased from light intensity Zone 1 to Zone 5 but the number in the strong light zone declined over time while it increased in the dark zone .Under yellow light, the occurrence percentage of A.nobilis decreased with increasing light intensity and the percentage in Zone 1 (36.97%) was significantly higher than that of in Zone 5 (4.90%).Over time, the number of fish in the dark zone initially increased and then decreased , while in the light and strong light zones , the number initially decreased and then increased .Under white light , the occurrence percentage of A.nobilis was higher in Zone 1 and Zone 5 ( with no difference between Zone 1 and Zone 5 ) and the percentage in Zones 2-4 were approximately the same . The fish number in the dark zone decreased initially and then increased over time , while in the strong light zone there was an initial increase followed by a decrease and no significant change in the light zone .Under blue light , the occurrence percentage of A.nobilis displayed no obvious difference among the five zones and the fish occurring in each zone varied little over time .关键词
光色/光强/鳙/船闸/过鱼效果Key words
light color/light intensity/bighead carp/ship lock/fish passage efficiency分类
生物科学引用本文复制引用
秦孝辉,王从锋,莫伟均,汪玲珑,陈明明,熊锋,刘德富,龚万阳..鳙对光色和光强的选择性试验[J].水生态学杂志,2015,(3):66-71,6.基金项目
水利部公益性行业科研专项（201201030）；贵州北盘江电力股份有限公司合作项（ SDHZ2012136）；三峡大学硕士学位论文培优基金（2015PY001）。 （）
