ArticleJournal of animal science and biotechnology2022
Constant light in early life induces fear-related behavior in chickens with suppressed melatonin secretion and disrupted hippocampal expression of clock- and BDNF-associated genes.
Article in Journal of animal science and biotechnology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 21 citations in OpenAlex.
- Stage-Specific Effects of Maternal Circadian Rhythm Disruption during Pre-Pregnancy, Pregnancy, and Lactation on Behavioral and Neurobiological Outcomes in Male Rat Offspring.Molecular neurobiology · 2026Article
- Integrated Transcriptomic and Proteomic Analyses Reveal the Effects and Mechanisms of Glycyrrhiza Polysaccharides in Alleviating Immune Stress in Broilers.Animals : an open access journal from MDPI · 2026Article
- Effects of resveratrol in a chronic stress model of layer chicks: insights from transcriptomics, metabolomics, and network pharmacology.Poultry science · 2026Article
- Brain insulin resistance: a key pathological hub linking metabolic and neuropsychiatric comorbidities.Frontiers in aging neuroscience · 2026Review
- The Influence of Different Light Spectra on Broiler Chicken Endocrine Systems and Productivity.Animals : an open access journal from MDPI · 2025Review
- Physiological Responses Vary with Molecular Damage Outcomes after Recovery from Constant Light.Integrative and comparative biology · 2025Article
- Effects of different photoperiods on melatonin level, cecal microbiota and breast muscle morphology of broiler chickens.Frontiers in microbiology · 2025Article
- Characterisation of runs of homozygosity and inbreeding coefficients in the red-brown Korean native chickens.Animal bioscience · 2024Article
- Circadian Corticosterone Profile in Laying Hens (Animals : an open access journal from MDPI · 2024Article
- Effect of Short Photoperiod on Behavior and Brain Plasticity in Mice Differing in Predisposition to Catalepsy: The Role of BDNF and Serotonin System.International journal of molecular sciences · 2024Article
- Measuring Chronic Stress in Broiler Chickens: Effects of Environmental Complexity and Stocking Density on Immunoglobulin-A Levels.Animals : an open access journal from MDPI · 2023Article
- LED Light Applied to the Feeder: Impact on Growth Performances of Chickens under Productive Conditions.Veterinary sciences · 2023Article
- Constant light exposure in early life induces m6A-mediated inhibition of IGF gene family in the chicken.Journal of animal science · 2022Article
Corrections and comments
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
Abstract
backgroundLight management plays an important role in the growth and behavior of broiler chickens. Constant light in early post hatch stage has been a common practice in broiler industry for improving growth performance, while whether and how constant light in early life affects the behavior of broiler chickens is rarely reported.
resultsIn this study, newly hatched chicks were kept in either constant (24 L:0 D, LL) or (12 L:12 D, LD) photoperiod for 7 d and then maintained in 12 L:12 D thereafter until 21 days of age. Constant light increased the average daily feed intake but not the body weight, which led to higher feed conversion ratio. Chickens in LL group exhibited fear-related behaviors, which was associated with higher corticosterone, lower melatonin and 5-HT levels. Concurrently, constant light exposure increased the mRNA expression of clock-related genes and suppressed the expression of antioxidative genes in the hippocampus. Moreover, brain derived neurotrophic factor/extracellular signal-regulated kinase (BDNF/ERK) pathway was suppressed in the hippocampus of chickens exposed to constant light in the first week post hatching.
conclusionsThese findings indicate that constant light exposure in early life suppress melatonin secretion and disrupts hippocampal expression of genes involved in circadian clock and BDNF/ERK pathway, thereby contributing to fear-related behaviors in the chicken.
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