Results 21 to 30 of about 11,432 (115)
This review summarizes the status of musk deer in China, highlighting severe population declines due to illegal hunting and habitat loss, and proposes integrated conservation strategies including habitat protection, captive breeding, and law enforcement to support the recovery and sustainable management of this ecologically and economically important ...
Feng Jiang +8 more
wiley +1 more source
采用解剖镜、扫描电镜技术,对长白山早春类短命植物牡丹草地下芽形态分化进行了观察,并采用游标卡尺测定各阶段芽体大小,研究地下芽的生长发育节律。发现牡丹草地上生活周期结束后,地下贮藏器官需要休眠2 个月左右,于7 月中下旬,地下芽开始出现形态分化和发育。其进程可分为萌芽期、花序原基分化期、花序形成期和花器官分化期4 个时期,历经2 个月左右,最终以发育成熟的花序进行越冬休眠。连续测定和相关分析表明,在整个夏眠期,牡丹草地下芽的茎高、芽长、芽径均随时间指数生长,茎高和芽长 ...
LIUXuelian(刘雪莲) +4 more
doaj +1 more source
Read the free Plain Language Summary for this article on the Journal blog. Abstract The nested subset pattern (nestedness) has been widely used to explain species distributions in island and fragmented systems. Mountain sky islands serve as critical natural laboratories for understanding the evolutionary consequences of geographic isolation and climate
Caiwen Zhang +5 more
wiley +1 more source
掌握麝的生长发育规律,是指导养麝生产,进行定向培育的重要依据。麝在不同时期生长发育速度不同,对各种营养及生活条件的要求也不同。为了培育出体大健壮、早熟高产、耐粗饲料、适应性强等特点的优良个体,我们于1971—1977年在陕西省镇坪县养麝实验场,进行了麝生长发育的研究。现将结果整理成文报告如下。
张保良
doaj
Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley +1 more source
【目的】研究生后营养过剩对SD雌性大鼠生后生长的影响,从而指导临床对儿童的营养干预。【方法】通过孕期限食法建立宫内发育迟缓(IUGR)大鼠模型,选择符合标准的雌性新生仔鼠作为实验组(即I组),I组随机分成对照组(即IC组)和小窝组(IS组);选择宫内未干预的雌性新生仔鼠作为对照组(即宫内发育正常组,C组),随机分成正常喂养组(CC组)和小窝组(CS组)。21d断乳后,IC组及CC组分别随机分成4只一笼,后正常饲料喂养,IS组及CS组高脂饮食喂养。每周测量各大鼠体质量及鼻肛长,并在不同生长发育周期 ...
陈丹纯 +5 more
doaj
We demonstrated that Anguilla japonica eDNA concentration was allometrically scaled with their body size in both the laboratory and riverine environments. Integrating body size allometry has the potential to improve population abundance estimates in the field, whereas further clarification is required for understanding eDNA production mechanisms ...
Toshiaki S. Jo +2 more
wiley +1 more source
在塔克拉玛干沙漠腹地特殊的生态条件下,通过植物固沙试验,对植物固沙中重要环节的植物种选择、配置、造林密度和造林季节以及合理灌溉问题进行了研究,并对不同灌溉条件下沙地盐分积累状况,以及对植物生长发育的影响进行了比较深入的研究。指出用矿化度>7.41g/L的咸水灌溉,对耐盐性较弱的固沙灌木的生长发育有限制作用 ...
赵存玉 陈广庭 王涛
doaj +2 more sources
The Next Jane program from Roots & Shoots was found effective for the conservation leadership improvement even though the participants attended it with different motivations. The development of conservation leadership traits was facilitated by skills development, a supportive environment, and reflective action.
Zhang Zekun, Chen Jin, Gu Siqi, He He
wiley +1 more source
有关毛丝鼠能否在我国正常发育和健康成长方面的研究材料,报导甚少。我们从1981年元月起对参加繁殖的母鼠、公鼠、及本场自己繁殖的仔鼠进行了全面的生长发育测定,借以研究毛丝鼠各个时期生长发育规律,以便为正确饲养和管理提供科学依据。选用本场1981年自繁的100头仔鼠作为对幼鼠个体发育的研究材料。在40日龄之内,每隔5天测量一次,测量的项目有:体重、休长、尾长、耳长、后足长 ...
阚兴国, 梁杰荣, 何祥俊
doaj

