Results 21 to 30 of about 99,407 (158)
, 2008 锯缘青蟹(Scylla serrata)是生活在河口海区的一种经济甲壳动物,环境温度对其生化组成具有重要影响,而其环境温度是随季节变化而不断变化.本研究采用生物化学方法对锯缘青蟹鳃、肝胰腺和肌肉等3种器官组织中可溶性蛋白和可溶性糖含量的季节变化进行研究.结果显示锯缘青蟹3种不同器官、组织中可溶性蛋白含量,均是夏季最低,冬季最高,春秋季介于2者之间.3者的变化趋势一致,春季后降低,夏季降至最低,然后秋季和冬季依次升高.3种不同器官、组织中可溶性糖含量均是春季最高,夏季最低,秋冬季介于2者之间 ...
李少菁 +4 more
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Gaoya dianqi, 2003 季节因素将影响接地系统的安全性能。季节系数随冰冻季节形成的地表高阻层的电阻率及其厚度的增加而增加。在我国北方高寒冰冻地区接地系统的接地电阻季节系数可达3.0,接触电压和跨步电压季节系数可能达到10和5.4。在雨季形成的地表低胆层也有可能导致接触电压的升高。采用垂直接地极能减小接地系统的季节系数,起稳定接地系统安全性能的作用。
何金良 +4 more
doaj
Journal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
wiley +1 more source
野生动物学报, 2022 季节性繁殖是哺乳动物在长期的进化过程中,为了应对外界环境的变化,选择合适的季节进行繁殖的行为。雄性哺乳动物在非繁殖季节表现为睾丸退化,精子发生的减数分裂过程受阻,进入繁殖季节性腺恢复,重新启动精原细胞的分裂和分化,这种季节性精原细胞分裂和分化与精子发生受到环境因子和多种体内激素的调节。就光周期信号分子——褪黑激素通过TSH-DIO2/DIO3-T3逆行通路和HPG轴—睾酮—视黄酸信号系统对雄性哺乳动物繁殖季节性调控的研究综述可知:褪黑激素通过调控HPG轴的功能促进精子的发生 ...
杨 笛, 陈婉依, 宫泽儒, 杨 明
doaj
野生动物学报, 2018 为探讨阿拉善黄鼠(Spermophilus alaschanicus)的消化道特征对贺兰山荒漠环境的适应,对野生环境中阿拉善黄鼠消化道各项指标进行了测定。实验分别测定了不同季节胃、小肠、大肠、盲肠的长度、鲜重及净鲜重。结果表明阿拉善黄鼠消化道的总鲜重和总长度有显著季节差异,秋季较高,夏季次之,春季最低; 胃和盲肠鲜重以及盲肠净鲜重有显著季节差异,以秋季最重,春夏较轻; 小肠和盲肠的长度有显著季节差异,两者秋季最长,小肠夏季居中,春季最短,而盲肠春季居中,夏季最短 ...
王志勇 刘 鹏 燕永彬 滕丽微 高 惠孙玉姣 王继飞 刘振生
doaj
Integrative Conservation, Volume 5, Issue 2, Page 225-235, June 2026.This study used camera trap data from 6 years between 2016 and 2021 and generalized linear mixed models to explore the factors that influence the spatial density distribution of lynx and its prey populations in warm and cold seasons in Inner Mongolia Hanma National Nature Reserve, China.
Wentao Zhang +11 more
wiley +1 more source
野生动物学报, 2017 在2015 ～2016年间,分四季调查了乐清湾湿地鸟类资源状况。共调查到鸟类195种,分属16目46科,其中春季11目34科114种9 998只,夏季14目37科98种5 449只,秋季15目42科112种6 569只,冬季11目35科119种7 552只,不同季节鸟类物种数和个体数量差异较大。从丰富度指数看,冬季最高(13.21),夏季最低(8.89)。从多样性指数看,春季最高(4.57),秋季最低(3.95)。从相似度指数看,春季和冬季之间最高(57.82%),春季与夏季之间最低(33.33 ...
孔 强 敖展雄 杨秋花 宫莉霞 鲁庆彬
doaj
Functional Ecology, Volume 40, Issue 6, Page 1878-1891, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
wiley +1 more source
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Prioritization in conservation is crucial for the development of efficient and effective decision‐making policies. For many decades, the importance of some species and their habitats has been assessed and applied in conservation legislation, but bats and their diurnal roosts have ofbeen overlooked.
David López‐Bosch +6 more
wiley +1 more source