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Effect of early fasting with or without fed supplemental organic selenium on thermoregulation and oxidative status in Pekin ducks during summer season
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Abstract: This study was conducted to determine whether maximum fasting period improves heat tolerance in White Pekin ducks with or without dietary supplementation with organic selenium and does not cause oxidative stress. Two hundred and forty of White Pekin ducklings at one-day old were divided into two groups of 120 birds each: The first group was fed standard diet and the second group was fed standard diet supplemented with 0.3 ppm organic selenium (Se). Each group was divided into four treatments (A, B, C and D) equal in number (30 ducklings). Treat A served as control and was fed ad libitum. Whereas, treat B, C and D were kept off feed 1Tom 9:00 a.m. to 1:00 p.m., 9:00 a.m. to 3:00 p.m. and 9:00 a.m. to 5:00 p.m., respectively, each treat included three replicates of 10 birds each. The experiment was lasted when ducks were 42 days old. Growth performances, Carcass characteristics, some organs as a percentage of body weight, thyroid hormone, some blood components and oxidative status parameters were measured. At 21 days of age, ducks in fasted treats B and C with organic selenium supplementation had superior improvement in body weight (BW), body weight gain (BWG) and feed conversion ratio (FCR) as compared with the other treats. Also, Fasted treat with selenium supplementation reduced plasma triglycerides, cholesterol, uric acid, activity of plasma glutathione peroxidase (GSH-Px) in blood and malondialdehyde (MDA) concentrations compared with control treat. On the other hand, re-feeding from 22 to 42 days with selenium supplementation in fasted treats B and C had improvement in body weight (BW), body weight gain (BWG) and feed conversion ratio (FCR) as compared with the other treats. In addition, re-feeding from 22 to 42 days with selenium supplementation had little effect on some physiological traits; however, there were no significant differences concerning plasma cholesterol, glucose, uric acid concentrations and malondialdehyde content between treatments while, activity of plasma GSHPx was improved in fasted treats with selenium supplementation at 42 days of age. Moreover, increase in the fasting period with selenium supplementation also resulted in comparatively lower rectal temperature of the ducks under study at 21 or 42 days of age is concluded from the present results that fasting for 8 hours ducks were suffere4 severe physiological and oxidative stress but addition of organic selenium supplementation can alleviate the stress of the birds, while fasting for 4 hours or 6 hours with selenium supplementation during hot environmental temperatures could improve the productivity and oxidative status of White Pekin ducks.
Keywords: Pekin ducks, selenium, fasting, some physiological responses and productive performance.
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| Publication year |
2013
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| Pages |
317-333
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| Availability location |
معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
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| serial title |
The 4th Scientific Conference of Animal Production Research Institute (APRI)
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Nutrition
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AGROVOC
TERMS |
Heat tolerance.
Oxidation.
Selenium.
Stress.
Underfeeding.
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| Proposed Agrovoc |
productive performance;some physiological responses;Pekin ducks;fasting period;
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| Publication Type |
Conference/Workshop
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