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| 论文摘要： | Light color has increasingly been recognized as significant factor in aquaculture, influencing fish behavior, physiology, and consequently production efficiency. The Chinese longsnout catfish (Leiocassis longirostris), an economically important freshwater species in China, is known for its pronounced sensitivity to environmental stimuli, particularly light. This study systematically investigated the effects of green (516.9 nm, 115 lx), and red (630.9 nm, 115 lx),as well as white (full spectrum, 115 lx) LED light conditions on the feeding behavior and growth performance of L. longirostris over a 21-day period. Eighteen fish (mean weight: 32.3 +/- 5.4 g; mean total length: 15.6 +/- 0.8 cm) were randomly assigned to tanks (n = 6 per treatment), and both feeding behavior (latency, frequency, and motivation) and growth parameters (total food intake, specific growth rate, feed conversion ratio, and condition factor) were quantitatively analyzed. Results showed that red light significantly increased feeding motivation, reducing latency to feed (similar to 12.6 s to similar to 7.8 s) and boosting feeding frequency by 20 % and an 11.5 % reduction feed conversion efficiency. Green light enhanced feeding behavior compared to white light, although to a lesser extent than red light. This suggests that while spectral manipulation enhances feeding behavior and feed intake, other factors are needed for substantial growth. Overall, these findings provide critical insights into species-specific visual and behavioral adaptations, offering practical guidance for aquaculture optimization through tailored LED lighting strategies that enhance feeding efficiency without compromising production outcomes. |
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