Yadav Anupama, Rani Sangeeta
Center for Biological Timekeeping, Department of Zoology, University of Lucknow, Lucknow, India.
Chronobiol Int. 2024 Dec;41(12):1503-1515. doi: 10.1080/07420528.2024.2429659. Epub 2024 Nov 26.
The present study explores the effect of differential food treatment on the migratory phenology of redheaded bunting (). Birds were divided into four groups ( = 10 each) on the basis of the food provided. Group I was fed with seeds of (kakuni), while group II was provided with protein-rich diet (combination of; 3 parts egg white and 1 part kakuni seeds). Likewise, group III birds received fat-rich food (i.e. 3 parts sesame seeds and 1 part kakuni seeds). Birds in group IV were provided with all three food items mentioned above separately. The experiment continued until the appearance of 7 cycles of . The results reveal a significant impact of food on locomotor activity and food intake behavior of birds, although the physiological response as demonstrated by a gain in body mass, fat score, and gonadal recrudescence was mainly influenced by the LHS. Besides the behavioral and physiological responses, the hypothalamic expression of neuropeptide Y (NPY) in infundibular complex (INc) was significantly high for group IV, highlighting the importance of "variety" in food intake. Thus, the present study suggests a significant role of food in influencing seasonal responses via hypothalamic NPY stimulation.
本研究探讨了不同食物处理对红头鹀迁徙物候的影响。根据提供的食物，将鸟类分为四组（每组n = 10）。第一组喂食黍（黍米）种子，而第二组提供富含蛋白质的饮食（的组合；3份蛋清和1份黍米种子）。同样，第三组鸟类接受富含脂肪的食物（即3份芝麻籽和1份黍米种子）。第四组的鸟类分别提供上述所有三种食物。实验持续到出现7个周期的。结果表明，食物对鸟类的运动活动和食物摄入行为有显著影响，尽管体重增加、脂肪评分和性腺再发育所显示的生理反应主要受左侧因素影响。除了行为和生理反应外，第四组在漏斗复合体（INc）中神经肽Y（NPY）的下丘脑表达显著较高，突出了食物“多样性”在食物摄入中的重要性。因此，本研究表明食物通过下丘脑NPY刺激在影响季节性反应中起重要作用。
