The effect of constant and diurnal cyclic temperatures on performance and blood system of young turkeys |
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| Affiliation: | 1. Dept. of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, China;2. Institute of Pharmacy, Dept. of Pharmaceutics, Biopharmaceutics and NutriCosmetics, Freie Universität Berlin, Berlin, Germany;3. Advance Pharma GmbH and Steiner Deutsche Arzneimittel GmbH, Berlin, Germany;1. Laboratory of Zoology, Department of Zoology, Faculty of Science, School of Biology, University of Thessaloniki, GR-54006 Thessaloniki, Greece;2. Laboratory of Animal Physiology, Department of Zoology, Faculty of Science, School of Biology, University of Thessaloniki, GR-54006 Thessaloniki, Greece |
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| Abstract: | At high ambient temperature (Ta=35°C) weight gain and feed intake declined significantly. At 15°C weight gain was similar to that at 25°C, at the cost of increased feed intake. Under diurnal cyclic temperature, weight gain and feed intake were significantly lower than in the average corresponding temperature.In all treatments the turkeys’ body temperature (Tb) was at the lower level of normothemia known for broiler chickens at a similar age.The blood system compensated for changes in Ta by increasing hematocrit, hemoglobin concentration and heart muscle weight at low Ta, and by plasma expansion and increased panting at high Ta.Plasma (T3) concentration was positively correlated with feed intake and weight gain. |
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