Effect of High Environmental Temperature on Egg Production, Serum Lipoproteins and Follicle Steroid Hormones in Laying Hens
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- Yoshida Nami
- Laboratory of Animal Behavior and Physiology, Graduate School of Biosphere Science, Hiroshima University, Japan
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- Fujita Masanori
- Laboratory of Animal Behavior and Physiology, Graduate School of Biosphere Science, Hiroshima University, Japan
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- Nakahara Munehiro
- Laboratory of Animal Behavior and Physiology, Graduate School of Biosphere Science, Hiroshima University, Japan
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- Kuwahara Teppei
- Laboratory of Animal Behavior and Physiology, Graduate School of Biosphere Science, Hiroshima University, Japan
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- Kawakami Shin-Ichi
- Laboratory of Animal Behavior and Physiology, Graduate School of Biosphere Science, Hiroshima University, Japan
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- Bungo Takashi
- Laboratory of Animal Behavior and Physiology, Graduate School of Biosphere Science, Hiroshima University, Japan Japanese Avian Biosphere Project Research Center, Hiroshima University, Japan
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The aim of this study was to establish which aspect of egg production, plasma lipoproteins and preovulatory follicle steroid hormones in laying hens is altered by thermal environment. In experiment 1, Single Comb White Leghorn hens (80-90wk of age) were exposed to three levels of environmental temperature by rotation (23, 27 and 31°C) for total 3 months, and feed intake, rectal temperature and egg production parameters were measured in each experimental period. In experiment 2, the hens (80wk of age) were exposed to two levels of environmental temperature (23 and 31°C) for 7 days, and concentration of plasma lipoproteins and follicle steroid hormones were determined. Feed intake in hens exposed to 31°C significantly decreased compared with that at 23 and 27°C, and rectal temperature at 31°C was significantly higher than that at 23°C. In the egg production parameter, egg yolk density was significantly smaller at 27 and 31 than at 23°C. Finally, the concentrations of very low density lipoprotein in serum, and of estradiol 17-β and progesterone in follicles were adversely affected by environmental temperature at 31°C. These results suggest that high environmental temperature negatively influences both the lipoprotein and steroid hormones and consequently reduces egg production, but the reduction in feed intake is not the only reason for a decline in egg quality in laying hens.
収録刊行物
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- The Journal of Poultry Science
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The Journal of Poultry Science 48 (3), 207-211, 2011
日本家禽学会
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詳細情報 詳細情報について
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- CRID
- 1390001205207318784
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- NII論文ID
- 130004446341
- 10029282835
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- NII書誌ID
- AA11564513
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- ISSN
- 13490486
- 13467395
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- NDL書誌ID
- 11174124
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可