References
- 1. Aengwanich, W., Wandee, J., 2021: The effect of increasing temperature on Hsp60 expression, oxidative stress, antioxidants, electrolyte changes and apoptosis in broiler blood cells in-vitro. Eur. Poult. Sci., 85. DOI: 10.1399/eps.2021.339.
- 2. Altan, Ö. Z. G. E., Pabuçcuoğlu, A., Altan, A., Konyalioğlu, S., Bayraktar, H., 2003: Effect of heat stress on oxidative stress, lipid peroxidation and some stress parameters in broilers. Br. Poult. Sci., 44, 4, 545–550. DOI: 10.1080/00071660310001618334.
- 3. Ayo, J. O., Ogbuagu, N. E., Toluhi, C. A., Abdullahi, U. S., Ramon-Yusuf, S. B., 2022: Diurnal and seasonal fluctuations in cloacal temperature in helmeted guinea-fowl (Numida meleagris) and the effect of ascorbic acid. Biol. Rhythm Res., 53, 10, 1550–1561. DOI: 10.1080/09291016.2021.1972261.
- 4. Balakrishnan, K. N., Ramiah, S. K., Zulkifli, I., 2023: Heat shock protein response to stress in poultry: A review. Animals, 13, 2, 317. DOI: 10.3390/ani13020317.
- 5. Barnett, J. L., Hemsworth, P. H., Hennessy, D. P., McCallum, T. H., Newman, E. A., 1994: The effects of modifying the amount of human contact on behavioral, physiological, and production responses of laying hens. Appl. Anim. Behav. Sci., 41, 1-2, 87–100. DOI: 10.1016/0168-1591(94)90054-X.
- 6. Beckford, R. C., Ellestad, L. E., Proszkowiec-Weglarz, M., Farley, L. S., Brady, K., Angel, R., Liu, H., Porter, T. E., 2020: Effects of heat stress on performance, blood chemistry, and hypothalamic and pituitary mRNA expression in broiler chickens. Poult. Sci., 99, 12, 6317–6325. DOI: 10.1016/j.psj.2020.09.052.
- 7. Campbell, D. L. M., De Haas, E. N., Lee, C., 2019: A review of environmental enrichment for laying hens during rearing in relation to their behavioral and physiological development. Poult. Sci., 98, 1, 9–28. DOI: 10.3382/ps/pey319.
- 8. Cheesbrough, M., 2000: District Laboratory Practice in Tropical Countries. Part 2. Cambridge University Press, UK, 434 pp.
- 9. de Haas, E. N., Kemp, B., Bolhuis, J. E., Groothuis, T. G., Rodenburg, T. B., 2013: Fear, stress, and feather pecking in commercial white and brown laying hen parent-stock flocks and their relationships with production parameters. Poult. Sci., 92, 9, 2259–2269. DOI: 10.3382/ps.2012-02996.
- 10. Dissegna, A., Turatto, M., Chiandetti, C., 2021: Context-specific habituation: A review. Animals, 11, 6, 1767. DOI: 10.3390/ani11061767.
- 11. Egbuniwe, I. C., Ayo, J. O., Kawu, M. U., Mohammed, A., 2018: Ameliorative effects of betaine and ascorbic acid on erythrocyte osmotic fragility and malondialdehyde concentrations in broiler chickens during the hot-dry season. J. Appl. Anim. Res., 46, 1, 380–385. DOI: 10.1080/09712119.2017.1308370.
- 12. Faulkner, W. R., King, J. W., 1970: Manual of Clinical Laboratory Procedures. The Chemical Rubber Company, Cleveland, Ohio, pp. 354.
- 13. Forkman, B., Boissy, A., Meunier-Salaun, M.C., Canali, E., Jones, R.B., 2007: A critical review of fear tests used on cattle, pigs, sheep, poultry and horses. Physiol. Behav., 92, 340–374. DOI: 10.1016/j.physbeh.2007.03.016.
- 14. Gouda, A., Tolba, S., Mahrose, K., Felemban, S. G., Khafaga. A. F., Khalifa N. E., et. al., 2024: Heat shock proteins as a key defense mechanism in poultry production under heat stress conditions. Poult. Sci., 103, 4, 103537. DOI: 10.1016/j. psj.2024.103537.
- 15. Grissom, N., Bhatnagar, S., 2009: Habituation to repeated stress: get used to it. Neurobiol. Learn. Mem., 92, 2, 215–224. DOI: 10.1016/j.nlm.2008.07.001.
- 16. Gross, W. B., Siegel, H. S., 1983: Evaluation of the hetero-phil/lymphocyte ratio as a measure of stress in chickens. Avian Dis., 27, 4, 972–979. DOI: 10.2307/1590198.
- 17. Herman, J.P., 2013: Neural control of chronic stress adaptation. Front. Behav. Neurosci., 7, 61. DOI: 10.3389/fnbeh.2013.00061.
- 18. Hemsworth, P. H., Coleman, G. J., Barnett, J. L., Jones, R. B., 1994: Behavioural responses to humans and the productivity of commercial broiler chickens. Appl. Anim. Behav. Sci., 41, 1-2, 101-114. DOI: 10.1016/0168-1591(94)90055-8.
- 19. Jones, R. B., 1996: Fear and adaptability in poultry: Insights, implications, and imperatives. World’s Poult. Sci. J., 52, 2, 131–174. DOI: 10.1079/WPS19960013.
- 20. Jones, R., 1993: Reduction of the domestic chick’s fear of human beings by regular handling and related treatments. Anim. Behav., 46, 991–998. DOI: 10.1006/anbe.1993.1280.
- 21. Kang, S., Kim, D. H., Lee, S., Lee, T., Lee, K. W., et. al., 2020: An acute, rather than progressive, increase in temperature-humidity index has severe effects on mortality in laying hens. Front. Vet. Sci., 7, 568093. DOI: 10.3389/fvets.2020.568093.
- 22. Kremer, L., Holkenborg, S.K., Reimert, I., Bolhuis, J.E., Webb, L.E., 2020: The nuts and bolts of animal emotion. Neurosci. Biobehav. Rev., 113, 273–286. DOI: 10.1016/j.neubiorev.2020.01.028.
- 23. McEwen, B. S., 2007: Physiology and neurobiology of stress and adaptation: central role of the brain. Physiol. Rev., 87, 3, 873–904. DOI: 10.1152/physrev.00041.2006.
- 24. Nash, R. F., Gallup, G. G., 1976: Habituation and tonic im-mobility in domestic chickens. J. Comp. Physiol. Psychol., 90, 9, 870–876. DOI: 10.1037/h0077265.
- 25. Ogundeji, T., Ayo J. O., 2024: Open field and tonic immobility responses in broiler chickens administered lycopene. Vet. Integr. Sci., 23, 1, e2025023-1-10. DOI: 10.12982/VIS.2025.023
- 26. Patel, S., Johnson, K., Adank, D., Rosas-Vidal, L.E., 2022: Longitudinal monitoring of prefrontal cortical ensemble dynamics reveals new insights into stress habituation. Neurobiol. Stress, 20, 100481. DOI: 10.1016/j.ynstr.2022.100481.
- 27. Sulimova, L. I., Zhuchaev, K. V., Kochneva, M. L., 2020: Poultry behavior reactions and welfare (review). Agricultural Biol., 55, 2, 209–224. DOI: 10.15389/agrobiology.2020.2.209eng.
- 28. Tainika, B., Şekeroğlu, A., Akyol, A., Waithaka Ng’ang’a, Z., 2023: Welfare issues in broiler chickens: Overview. World’s Poult. Sci. J., 79, 285–329. DOI: 10.1080/00439339.2023.2175343.
- 29. Tao, X., Xin, H., 2003: Acute synergistic effects of air temperature, humidity and velocity on homeostasis of market-size boilers. ASABE, 46, 2, 491–497. DOI: 10.13031/2013.12971.
- 30. Tiemann, I., Becker, S., Fournier, J., Damiran, D., Büscher, W., Hillemacher, S., 2023: Differences among domestic chicken breeds in tonic immobility responses as a measure of fearfulness. PeerJ, 11, e14703. DOI: 10.7717/peerj.14703.
- 31. Yahav, S., Goldfeld, S., Plavnik, I., Hurwitz, S., 1995: Physiological responses of chickens and turkeys to relative humidity during exposure to high ambient temperature. J. Therm Biol., 20, 245–253. DOI: 10.1016/0306-4565(94)00046-L
