Daylength Effects on Stress and Fear Responses in Broiler Chickens

Zulkifli, I.; Rasedee, Ahmad Fadly Nurullah; Syaadoh, O. Nor; Norma, M. T. Che

doi:10.5713/ajas.1998.751

Cited by 26 publications

(12 citation statements)

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“…Our findings suggested either of the following concepts: (1) the reduction of growth in fish under extended day length was related to metabolic changes follow by light variations or (2) the growth reduction was due to a chronic stress caused by photoperiod manipulation. Studies on a number of species from a variety of taxa including rat (Vanbetteray et al 1991), mice (Van der Meer et al 2004), chicken (Zulkifli et al 1998) and fish (Leonardi and Klempau 2003) indicated that timing of light cycles may be a source of stress. In this study, the measurement of different parameters used as stress indices indicated that photoperiod manipulation caused a chronic stress, as the interrenal stress response of Persian sturgeon had not acclimated after a 56‐d period.…”

Section: Discussionmentioning

confidence: 99%

Effect of Photoperiod Manipulation on Growth Performance, Physiological and Hematological Indices in Juvenile Persian Sturgeon, Acipenser persicus

Falahatkar¹,

Poursaeid²,

Efatpanah³

et al. 2012

J World Aquaculture Soc

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The effect of five different light regimes on growth, stress and hematological indices was studied in Persian sturgeon, Acipenser persicus. Fish with average weight of 645.3 ± 11.2 g were subjected to different photoperiods (24 L, 12 L:12 D, 16 L:8 D, 8 L:16 D and 24 D) for 8 wk. Blood samples were collected at the end of the experiment for measuring cortisol, glucose and hematological features. The whole growth parameters showed no significant difference. Plasma cortisol concentration was significantly higher in 12 L:12 D, while the lowest level was observed in fish exposed to 24 D. No significant changes were observed among the treatments for glucose concentration. Lactate concentration varied significantly among the treatments. Some hematological indices including hematocrit and number of white blood cells were affected by different light regimes, but the others (hemoglobin and number of red blood cells) were not affected significantly. The results showed that photoperiod manipulation can alters some stress-related metabolites and may enhance growth rate in fish exposing to continuous darkness.

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Section: Discussionmentioning

confidence: 99%

Effect of Photoperiod Manipulation on Growth Performance, Physiological and Hematological Indices in Juvenile Persian Sturgeon, Acipenser persicus

Falahatkar¹,

Poursaeid²,

Efatpanah³

et al. 2012

J World Aquaculture Soc

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“…Although it is known that lighting influences behavior, reproductive ability, and, more specifically, growth rates of poultry (Phillips and Piggins, 1992), livestock are still reared under different lighting conditions from that of nature and most livestock experience intense stress due to light intensity, wavelength, and photoperiod which tuned by human (Zulkifli et al, 1998). …”

Section: Introductionmentioning

confidence: 99%

Effects of Light Color on Energy Expenditure and Behavior in Broiler Chickens

Kim

Lee

2014

Asian Australas. J. Anim. Sci

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This study was conducted in order to investigate whether the presence of light or different colors of light would influence the energy expenditure and behavior of broiler chickens. Eight 8-week-old broiler chickens were adapted to a respiration chamber (Length, 28.5 cm; Height, 38.5 cm; Width, 44.0 cm) for one week prior to the initiation of the experiment. In experiment 1, energy expenditure and behavior of the chickens were analyzed in the presence or absence of light for four days. Chickens were exposed to 6 cycles of 2 h light/2 h dark period per day. In experiment 2, the broiler chickens that had been used in experiment 1 were used to evaluate the effect of 4 different wavelength light-emitting diodes (LEDs) on the energy expenditure and behavior of broiler chickens. The LEDs used in this study had the following wavelength bands; white (control), red (618 to 635 nm), green (515 to 530 nm) and blue (450 to 470 nm). The chickens were randomly exposed to a 2-h LED light in a random and sequential order per day for 3 days. Oxygen consumption and carbon dioxide production of the chickens were recorded using an open-circuit calorimeter system, and energy expenditure was calculated based on the collected data. The behavior of the chickens was analyzed based on following categories i.e., resting, standing, and pecking, and closed-circuit television was used to record these behavioral postures. The analysis of data from experiment 1 showed that the energy expenditure was higher (p<0.001) in chickens under light condition compared with those under dark condition. The chickens spent more time with pecking during a light period, but they frequently exhibited resting during a dark period. Experiment 2 showed that there was no significant difference in terms of energy expenditure and behavior based on the color of light (white, red, green, and blue) to which the chickens were exposed. In conclusion, the energy expenditure and behavior of broiler chickens were found to be strongly affected by the presence of light. On the other hand, there was no discernible difference in their energy expenditure and behavior of broiler chickens exposed to the different LED lights.

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“…These results are in good agreement with those findings obtained by Ibrahim (2005) and Soliman et al (2006) who concluded that there were no significant differences in blood constituents ( total protein, albumen and globulin) among birds reared under different light regimes. Also, Zulkifli et al (1998), Moore and Siopes (2000) and Abbas et al (2008) found that broilers reared under continuous light had a higher heterophil:lymphocyte ratio and experienced greater fear response than birds reared under a 12L:12D photoperiod. In the same line, El-Fiky et al (2008) indicated that serum total lipids was significantly higher for continuous light regime than constant (16.2%) and intermittent (14.5%) light, although serum total protein and cholesterol levels were not different among the different light regimes, revealing no physiological stress.The16L:8D program tended to reduce fearfulness and thus psychological stress (Bayram and Özkan, 2010).…”

Section: Blood Parametersmentioning

confidence: 97%

Improvement of Productive and Reproductive Performance of Dandarawi Chicken Through Flash Light Program

Farghly

2014

Egyptian Journal of Animal Production

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An experiment with Dandarawi chickens was designed to see the impact of flash light (FL) stimulation on productive and reproductive performance. Three hundred, four weeks old chicks were divided into 5 equal groups (3 replicates of 20 birds each) and housed in floor pens. The first group, the birds were subjected to 12 and 16 hrs common light (CL)/day during the growing and laying periods, respectively and were considered as the control group (C). While, the second group (T1), birds were subjected to 12 hrs light (9 CL: 3 FL) and16 h light (12 CL:4 FL) during growing and laying periods, respectively. The third group (T2), birds were subjected to 12 hrs light (6 CL:6 FL) and16 hrs light (8 CL:8 FL) during growing and laying periods, respectively. The fourth group (T3), birds were subjected to 12 h light (3 CL : 9 FL) and16 h light (4 CL:12 FL) during growing and laying periods, respectively. The fifth group (T4), birds were subjected to 12 and 16 hrs flash light (FL)/day during the growing and laying periods, respectively. Feed and water were available ad libtum and all the other conditions were the same during the experimental period. Results emanating from this study indicated that exposure of birds to flash light affected many of the studied traits and the effects were significant (P≤0.05) on body weight, weight gain, feed conversion, liver, giblets, abdominal fat, total lipids, blood AST, H/L ratio, egg number, egg shell thickness, egg yolk index, age at sexual maturity, fertility, semen volume & concentration, follicle number, testes and ovary percentages. While, there were no significant (P>0.05) differences in most carcass traits, blood components (protein, cholesterol, ALT), shell strength, Haugh units, egg components, leg problems, plumage conditions, bone lengths, semen pH, oviduct weight & length and hatchability percentages. Finally, the economical efficiency of the birds reared on12 hrs light (6 CL: 6 FL) during the growing period and birds provided with either 16 hrs of light (4 CL:12 FL) for table eggs, as well as (8 CL: 8 FL) or (4 CL:12 FL) for fertile eggs during laying periods were superior to that of birds in other groups. Light flashes program as bio-intermittent light might be economical alternative light to continuous or common light in sight and stimulation of internal organs or initiation of hormones release without negatively affecting the performance and welfare of chickens during growing and laying periods.

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Daylength Effects on Stress and Fear Responses in Broiler Chickens

Cited by 26 publications

References 0 publications

Effect of Photoperiod Manipulation on Growth Performance, Physiological and Hematological Indices in Juvenile Persian Sturgeon, Acipenser persicus

Effect of Photoperiod Manipulation on Growth Performance, Physiological and Hematological Indices in Juvenile Persian Sturgeon, Acipenser persicus

Effects of Light Color on Energy Expenditure and Behavior in Broiler Chickens

Improvement of Productive and Reproductive Performance of Dandarawi Chicken Through Flash Light Program

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