Results 21 to 30 of about 461,833 (278)
Wildlife Letters, EarlyView.Using radiotelemetry, we found that the movement and home range of the endangered Sacalia bealei varied significantly across reproductive classes and seasons, with males exhibiting greater movement than females during wet and mating seasons. The species exhibits strong aquatic dependence, favoring deep pools interspaced among riffle‐pool sequences ...
Wing Sing Chan +3 more
wiley +1 more source
Methods in Ecology and Evolution, EarlyView.Abstract Elliptic Fourier analysis (EFA) is often employed in geometric morphometrics (GM), but the normalization of elliptic Fourier descriptor (EFD) has persistently posed challenges for obtaining unique and comparable results, especially in the application of outline‐based GM methods, which limits the implementation in automated analysis of numerous,
Hui Wu +6 more
wiley +1 more source
Dianci bileiqi, 2012 配电网保护间隙在提高线路跳闸重合率和防止架空绝缘导线雷击断线上,取得了较为显著的效果。但在实验中发现相对于避雷器动作时间,保护间隙动作时间和绝缘子动作时间相差不多。从保护间隙和避雷器动作时间不同出发,在分析保护间隙保护距离时考虑了保护间隙闪络时间对保护间隙保护距离的影响。先通过实验确定绝缘子和保护间隙的伏秒特性曲线,然后利用相交法计算出不同等级雷电过电压下保护间隙和绝缘子动作时间,最后根据保护间隙和绝缘子的动作时间差和雷电波在线路上传播的速度计算出不同等级雷电过电压下保护间隙的保护距离 ...
张东 +4 more
doaj
When and why to give shorebirds a head start
Conservation Biology, EarlyView.Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson +4 more
wiley +1 more source
野生动物学报, 2005 野生动物保护一般有三种形式:就地保护,迁地保护,离体保存。目前,国内外就地保护的主要形式,就是建立自然保护区。自然保护区就如同一个个保存着物种资源的岛屿,处在人类干扰的汪洋大海中。按照岛屿生物地理学原理,自然保护区的面积当然是越大越好 ...
华彦, 李国忠, 高桂华
doaj
The collective application of shorebird tracking data to conservation
Conservation Biology, EarlyView.Abstract Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence‐based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership
Autumn‐Lynn Harrison +71 more
wiley +1 more source
Guangtongxin yanjiu, 2017 为解决原有基于G.8132协议的Wrapping保护机制下的环网保护标签维护管理复杂的难题,提出了一种改进的基于Wrapping保护机制的环网保护方案,详细论述了环网保护业务通道的建立与倒换机制,介绍了相关功能模块的架构,并且测试验证了保护倒换时间。该环网保护方案的保护倒换时间足以满足50ms的工程应用要求,因此可为PTN（分组传送网）承载业务提供有效的网络级保护。
刘唯, 何岩
doaj
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
野生动物学报, 2008 象头山自然保护区是以保护珍稀濒危野生动植物物种及南亚热带季风常绿阔叶林森林生态系统为主要保护对象的国家级自然保护区。本文从象头山自然保护区的自然资源状况、建立保护区重要性、机构设置及管理现状等方面进行了阐述和分析,提出了保护区存在的问题及今后发展的保护管理对策。
秦清双
doaj
, 2009 本实用新型公开了一种光缆连接保护装置，该光缆连接保护装置包括:保护套管(10)，用于保护光缆连接部位;以及对称安装在所述保护套管(10)两端部的第一酒杯环(20)和第二酒杯环(30)，用于连接保护套管和被连接的光缆。利用本实用新型，由于采用高强度金属材料制作保护套管，并连接光缆的受力部件，从而提高了光缆连接的强度。本实用新型通过现有的酒杯环配件及普通压线钳，实现方便 ...
刘育梁 +3 more
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