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首页> 外文期刊>Ecological research >Seasonal changes in parotid and rumen papillary development in Mongolian gazelle (Procapra gutturosa Pallas)
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Seasonal changes in parotid and rumen papillary development in Mongolian gazelle (Procapra gutturosa Pallas)

机译：蒙古瞪羚（Procapra gutturosa Pallas）腮腺和瘤胃乳头发育的季节性变化

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摘要

The Mongolian gazelle (Procapra gutturosa Pallas) lives in the Mongolian Plateau, where conditions are dry and cold from late autumn to early spring. The climate results in apparent seasonal changes in the nutrition of forage plants on the plateau. The morphology of the gazelle's rumen papillae and the weight of their salivary glands also reflect these changes. The relative weight of the parotids to body mass (0.8―1.3 g kg~(-1) and 1.8―2.7 g kg~(-0.75)) and the surface enlargement factor (SEF) of the internal rumen wall (8.5―12.0) fell within the range of mixed (intermediate) feeders. Although previous studies in a great number of ruminants have shown that parotid mass and SEF are positively related to feed quality, we found that relative parotid mass to body mass increased in winter, the dry and cold season, during the poorest dietary conditions. The surface enlargement factor increased from autumn to winter and spring, during the poorest and best seasons in feed quality, respectively. It is possible that an increase in parotid mass is related to water shortage from both feed and habitat in winter. An increase in parotid mass, suggesting an increase in saliva production, could meet the liquid needs of the gazelles during feeding and rumination in poor and dry forage seasons. The development of rumen papilla and the consequent increase in SEF in poor food seasons should result in the effective absorption of nutrients by Mongolian gazelles.
机译：蒙古瞪羚（Procapra gutturosa Pallas）居住在蒙古高原，那里的天气从秋末到初春干燥而寒冷。气候导致高原饲草植物营养的明显季节性变化。瞪羚瘤胃乳头的形态和唾液腺的重量也反映了这些变化。腮腺相对体重的相对重量（0.8〜1.3 g kg〜（-1）和1.8〜2.7 g kg〜（-0.75））和瘤胃内壁的表面膨大因子（SEF）（8.5〜12.0）属于混合（中级）喂料器范围。尽管先前对大量反刍动物的研究表明，腮腺质量和SEF与饲料质量成正相关，但我们发现，在最恶劣的饮食条件下的冬季，干燥和寒冷季节，腮腺相对于体重的相对质量增加。在饲料质量最差和最好的季节，从秋季到冬季和春季，表面膨大因子分别增加。腮腺质量的增加可能与冬季饲料和栖息地缺水有关。腮腺质量的增加表明唾液产量的增加，可以满足瞪羚在贫瘠和干燥草料季节的进食和反刍过程中的液体需求。在恶劣的食物季节，瘤胃乳头的形成和SEF的增加应导致蒙古瞪羚有效吸收营养。

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