کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1971790 1060229 2017 8 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Physiological effects of hypoxic conditions during the plateau period on the chicken embryo
ترجمه فارسی عنوان
اثرات فیزیولوژیکی شرایط کم اکسیژن در طول دوره فلات بر جنین مرغ
کلمات کلیدی
جوجه کشی؛ هیپوکسی؛ نرخ رشد؛ سرعت سوخت و ساز؛ جوجه های گوشتی. مصرف اکسیژن؛ جوجه؛ مصرف زرده تخم مرغ؛ کاهش اکسیژن بافت؛ انطباق
Incubation; Hypoxia; Growth rate; Metabolic rate; Broiler; Oxygen consumption; Chicks; Yolk consumption; Hypoxic stress; Adaptation
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی

The chick embryo employs several adaptive responses to hypoxic challenges, affecting both metabolism and oxygen (O2) transport. The present study assessed the effects of hypoxic conditions (17% O2) during the plateau phase on embryonic metabolic rate, cardiovascular parameters, and development up to hatching. The study was divided into 2 experiments: (1) Control; 17% O2 for 6 h/d on E16–E18 (6H), and 17% O2 for 12 h/d on E16–E18 (12H), and (2) Control; 12H, and 17% O2 continuously for 72 h on E16–E18, (72H). Hypoxic embryos exhibited a significant increase in heart rate and an upward trend starting on E17 in hematocrit and hemoglobin levels. We observed a decrease in metabolism in 12H and 72H embryos during the plateau period; their oxygen consumption as well as yolk consumption were lower compared to Control and they hatched with a significantly lower body temperature, indicating lower heat production. There was no evidence of adaptation or long-term effects of exposure to 17% O2 for 6 h/d. Exposure to 72 h of hypoxic conditions led to significant physiological changes and had a detrimental influence on embryonic development and growth. In contrast, exposure to 12 h/d produced moderate hypoxic changes, which helped the embryo to cope with the stress without significant influences on its growth and development. The decrease in metabolism may represent a metabolic adaptation through a decrease in resting metabolic rate and lower heat production. Such alterations may affect post-hatch performance and energy allocation between maintenance and growth, especially under stress when there is increased oxygen demand.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 203, January 2017, Pages 32–39
نویسندگان
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