Changes of Poultry Meat Chemical Composition, in Relationship with Lighting Schedule
Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32870
Changes of Poultry Meat Chemical Composition, in Relationship with Lighting Schedule

Authors: P. C. Boisteanu, M. G. Usturoi, Roxana Lazar, B. V. Avarvarei


The paper is included within the framework of a complex research program, which was initiated from the hypothesis arguing on the existence of a correlation between pineal indolic and peptide hormones and the somatic development rhythm, including thus the epithalamium-epiphysis complex involvement. At birds, pineal gland contains a circadian oscillator, playing a main role in the temporal organization of the cerebral functions. The secretion of pineal indolic hormones is characterized by a high endogenous rhythmic alternation, modulated by the light/darkness (L/D) succession and by temperature as well. The research has been carried out using 100 chicken broilers - “Ross" commercial hybrid, randomly allocated in two experimental batches: Lc batch, reared under a 12L/12D lighting schedule and Lexp batch, which was photic pinealectomised through continuous exposition to light (150 lux, 24 hours, 56 days). Chemical and physical features of the meat issued from breast fillet and thighs muscles have been studied, determining the dry matter, proteins, fat, collagen, salt content and pH value, as well. Besides the variations of meat chemical composition in relation with lighting schedule, other parameters have been studied: live weight dynamics, feed intake and somatic development degree. The achieved results became significant since chickens have 7 days of age, some variations of the studied parameters being registered, revealing that the pineal gland physiologic activity, in relation with the lighting schedule, could be interpreted through the monitoring of the somatic development technological parameters, usually studied within the chicken broilers rearing aviculture practice.

Keywords: lighting schedule, physic-chemical characteristics ofmeat, pineal gland at birds.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1555


[1] D. N. Andr├ís, J. C. Valér, Cry1 expression in the chicken pineal gland: Effects of changes in the light/dark conditions, General and Comparative Endocrinology, Vol 152, Issue 2-3, 2007, pp. 144-147.
[2] M. J. Bailey, P. D. Beremand, D. R. Hammer, T. L. Bell-Pedersen,V. M. Thomas Cassone, Transcriptional profiling of the chick pineal gland a photoreceptive circadian oscillator and pacemaker, Mol Endocrinol, 17(10), 2003, pp 2084-95.
[3] P. C. Boisteanu, Glanda pineala si rolul ei in crestere si dezvoltare la pasari, Editura Corson, Iasi, 2000.
[4] V. Csernus, Mess Béla, Biorhythms and pineal gland, Neuroendocrinology Letters nr. 6, vol. 24, 2003 pp. 404-411.
[5] V. Csernus, N. Faluhelyi, A. D. Nagy, Features of the circadian clock in the avian pineal gland, Ann. N.Y. Acad. Sci. 1040, 2005, pp. 281-287.
[6] V. Csernus, The Avian Pineal Gland, Chronobiology International, Volume 23, Numbers 1-2, 2006, pp. 329-339.
[7] A. Natesan, L. Geetha, M. Zatz, () - Rhythm and soul in the avian pineal, Cell. Tissue Res. 309, 2002, pp. 35-45.