环境因素对稀有鮈鲫个性行为的影响OA北大核心CSTPCD

Personality traits in fish refer to the stable differences in behavior among individual fish.These traits reflect life history strategies and are closely related to population dynamics,genetic variation,and environmental factors.Studying the influence of environmental factors on fish behavior can provide theoretical evidence and data for better understanding the adaptability of fish species,and for optimizing the rearing environment.Two behavioral tests were conducted,barrier crossing and shelter exiting,and personality traits of rare minnows during the two tests were observed under three sets of alternative conditions:with and without food deprivation(24 h),under four illumination intensities(500,1000,1500,2000 lx),and in the presence and absence of conspecifics.In the barrier crossing test,the pres-ence of conspecifics did not result in a significant difference in the latency period before moving(P＞0.05).However,with food deprivation,there was a significant reduction in the latency period.Under different illumination intensities(P＜0.05),the period significantly increased with illumination intensity.The total number of partitions crossed by rare minnows differed significantly under different illumination intensities(P＜0.01),and the number decreased as the illumination intensity increased.However,there was no significant difference in the total number of crossed partitions between the groups with or without conspecifics and between the food deprivation and well-fed groups(P＞0.05).In terms of the shelter exit-ing behavior test,the time for rare minnows to swim out of the shelter did not significantly change after 24 hours of food deprivation(P＞0.05).However,significant differences were observed in groups with the presence of conspecifics(P＜0.05)and under different illumination intensities(P＜0.01),and the time de-creased first and then increased as the illumination intensity increased.Overall,the results indicate that fasting-induced hunger and the presence of conspecifics enhances the exploratory behavior of rare min-nows.However,illumination intensity appears to be a key factor on the behavior of rare minnows.