The influence of long-term light deprivation (1 and 4 months) on the latency of leaving a start chamber (t1), feeding latency (t2), and food intake (or ration, R) was studied in carp Cyprinus carpio juveniles injected with serotonin (5-HT), as observed during 96 h post injection. It was found that 5-HT has no significant effect on t1 regardless of the illuminance regime (constant dark in experiment vs. alternating light/dark in control) while exerting a maximum effect on t2. One hour after 5-HT injection, t2 increases 5 times in fish deprived of light for 1 month and 11.6 times in those deprived of light for 4 months as compared to the control group. A significant 5-HT-induced decrease in R was observed after 1 month both in experimental and control groups and after 4 months in the experimental (light-deprived) group only. Possible mechanisms underlying the effect of 5-HT on the above parameters of fish feeding behavior under conditions of long-term light deprivation are discussed.

中文翻译：

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鱼类的摄食行为：长期光照剥夺对鲤鱼 Cyprinus carpio L 血清素效应的影响。

研究了长期光照剥夺（1 个月和 4 个月）对离开起始室的潜伏期（t1）、摄食潜伏期（t2）和摄食量（或日粮，R）的影响。在注射后 96 小时期间观察到的血清素 (5-HT)。发现 5-HT 对 t1 没有显着影响，而不管照度制度（实验中的恒定暗与对照中的交替亮/暗），同时对 t2 施加最大影响。注射5-HT后1小时，与对照组相比，禁光1个月的鱼的t2增加了5倍，而禁光4个月的鱼的t2增加了11.6倍。在实验组和对照组中均在 1 个月后以及仅在实验（光剥夺）组中 4 个月后观察到 5-HT 诱导的 R 显着降低。