ArticleEnvironmental science and pollution research international2021
Urban environment alter the timing of progression of testicular recrudescence in tree sparrow (Passer montanus).
Article in Environmental science and pollution research international, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 19 citations in OpenAlex.
- Exposure to Dim Light at Night Impairs Photoperiodic and Metabolic Gene Expression in Syrian Hamsters (Mesocricetus auratus).Journal of experimental zoology. Part A, Ecological and integrative physiology · 2026Article
- Artificial light at night (ALAN) negatively affects expression of transcripts involved in biosynthesis of molting and juvenile hormones in Bombyx mori.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2026Article
- Adjusting to urban stress: How Eurasian tree sparrows modulate multiple physiological and nutritional markers across sexes.Current zoology · 2025Article
- Dim light at night alters photoperiodic perception in male Syrian hamsters (Mesocricetus auratus).Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2025Article
- Time- and season-dependent changes in the steroidogenic markers in female tree sparrow (Passer montanus).Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2025Article
- Light at night: effect on the daily clock, learning, memory, cognition, and expression of transcripts in different brain regions of rat.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2023Article
- Artificial night illumination disrupts sleep, and attenuates mood and learning in diurnal animals: evidence from behavior and gene expression studies in zebra finches.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2023Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Urbanization is a rapidly growing phenomenon that affects wildlife. Laboratory studies show the effects of night light on the physiology of the organisms. Limited studies have been conducted on birds in their natural habitat. Here, we studied the effects of the urban environment on reproduction-linked phenomenon and molecules involved in the regulation of seasonal breeding. Birds (N=5/time/site) were procured from urban and rural sites at specific times, i.e., in March (stimulatory phase), June (reproductive phase), September (refractory phase), and December (sensitive phase) of 2018. Immediately after procurement, birds were brought to the laboratory. Bodyweight, bill color, molt in body feathers, and testes size were recorded. The next day, all the birds were sacrificed in the middle of the day. Blood was collected and serum was used for ELISA of corticosterone, triiodothyronine (T3), and thyroxine (T4). mRNA levels of thyroid-stimulating hormone-β (Tshβ), type 2 deiodinase (Dio2), type 3 deiodinase (Dio3), gonadotropin-releasing hormone (GnRh), and gonadotropin inhibitory hormone (GnIh) were measured in hypothalamic tissue. Urban birds showed higher levels of corticosterone during the stimulatory phase. There was a delay in the initiation of testicular growth in urban birds and it was supported by reduced levels of T3 in blood plasma and relatively lower transcription of Dio2 and GnRH mRNA in urban birds. Our findings suggest that the urban environment delays the timing of reproduction in birds and could be the consequence of local environmental conditions.
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