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大中型兽类是生态系统中具有标识性和重要生态功能的动物类群，了解三北地区大中型兽类物种的组成与分布现状是三北地区生物多样性保护的基础。本研究基于全面的文献检索，以中国三北地区体质量≥1 kg的陆生兽类物种为目标类群，汇总整理了2011—2020年中国三北地区目标兽类的分布数据，以红外相机实地调查的观测记录为主体，共收集到文献与数据集376份，汇总物种记录2 158条。结果显示：在三北地区2011—2020年共记录到分属6目15科的目标兽类68种，占全国目标兽类物种总数的48.23%。其中，被列为国家一级和二级重点保护野生动物的兽类分别有29种和27种，被中国红色名录评估为受威胁（CR、EN、VU）的物种有40种。三北地区中，西北地区是记录目标类群兽类物种数最多（63种）的区域，甘肃则是记录物种数最多（49种）的省级行政区。在不同动物地理分区中，青藏区是记录物种数（41种）最多的区域，内蒙古高原区的记录物种数最少（22种）。新疆是记录目标类群兽类平均体质量（81.11 kg）最大的省级行政区。三北地区目前共记录到6种大型顶级食肉动物，而北京、天津、辽宁三省市无大型顶级食肉动物记录。本研究的结果可以加深我们对近10年三北地区兽类资源现状的了解，为后续三北地区兽类物种的多样性编目更新，以及受威胁物种的研究与保护管理工作提供重要的基础资料。

Q958.1; 大中型兽类是生态系统中具有标识性和重要生态功能的动物类群,了解三北地区大中型兽类物种的组成与分布现状是三北地区生物多样性保护的基础.本研究基于全面的文献检索,以中国三北地区体质量≥1 kg的陆生兽类物种为目标类群,汇总整理了2011-2020年中国三北地区目标兽类的分布数据,以红外相机实地调查的观测记录为主体,共收集到文献与数据集375份,汇总物种记录2 158条.结果显示:2011-2020年在三北地区共记录到分属6目15科的目标兽类68种,占全国目标兽类物种总数的48.23%.其中,被列为国家一级和二级重点保护野生动物的兽类分别有29种和27种,被中国红色名录评估为受威胁(CR、EN、VU)的物种有40种.在三北地区中,西北地区是记录目标类群兽类物种数最多(63种)的区域,甘肃则是记录物种数最多(49种)的省级行政区.在不同动物地理分区中,青藏区是记录物种数最多(41种)的区域,内蒙古高原区记录物种数最少(22种).新疆是记录目标类群兽类平均体质量最大(81.11 kg)的省级行政区.三北地区目前共记录到6种大型顶级食肉动物,而北京、天津和辽宁三省市无大型顶级食肉动物记录.本研究结果有助于增进对近10年来三北地区兽类资源现状的认识,为后续三北地区兽类物种的多样性编目更新,以及受威胁物种的研究与保护管理工作提供重要的基础资料.

Although omega-3 fatty acids including docosahexaenoic acid (DHA) contain various health-promoting effects, their poor aqueous solubility and stability make them difficult to be induced in dairy foods. The aims of this research were to manufacture casein derivative-based delivery system using acid-induced gelation method with glucono-σ-lactone and to investigate the effects of production variables, such as pH and charged amount of linoleic acid, on the physicochemical properties of delivery systems and oxidative stability of DHA during storage in model milk. Covalent modification with linoleic acid resulted in the production of casein derivatives with varying degrees of modification. As pH was reduced from 5.0 to 4.8 and the charged amount of linoleic acid was increased from 0% to 30%, an increase in particle size of casein derivative-based delivery systems was observed. The encapsulation efficiency of DHA was increased with decreased pH and increased charged amount of linoleic acid. The use of delivery system for DHA resulted in a decrease in the development of primary and secondary oxidation products. An increase in the degree of modification of casein derivatives with linoleic acid resulted in a decrease in the formation of primary and secondary oxidation products than of free DHA indicating that delivery systems could enhance the oxidative stability of DHA during storage in model milk. In conclusions, casein derivatives can be an effective delivery system for DHA and charged amount of linoleic acid played a key role determining the physicochemical characteristics of delivery system and oxidative stability of DHA.