主题词：Circadian rhythm and melatonin; Sleep and related disorders; Sleep and Wakefulness Research; Effects of Environmental Stressors on Livestock; Neurobiology and Insect Physiology Research; Dietary Effects on Health; Sleep and Work-Related Fatigue; Reproductive Physiology in Livestock; Spaceflight effects on biology; Photoreceptor and optogenetics research; Genetic and phenotypic traits in livestock; Physiological and biochemical adaptations; Thermoregulation and physiological responses; Heart Rate Variability and Autonomic Control; Animal Behavior and Reproduction; Adipose Tissue and Metabolism; Psychological and Temporal Perspectives Research; Animal Behavior and Welfare Studies; Light effects on plants; Plant and animal studies; Stress Responses and Cortisol; Insect and Arachnid Ecology and Behavior; Sports Performance and Training; Ruminant Nutrition and Digestive Physiology; Animal Nutrition and Physiology