Results 51 to 60 of about 1,266 (124)
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Spatial segregation in at‐sea distribution is frequently observed in seabirds and can have important implications for conservation and management. Globally, many albatross and petrel populations are declining due to bycatch in fisheries. In South Georgia, the decrease in wandering albatrosses (Diomedea exulans) differs among breeding sites ...
V. Warwick‐Evans +3 more
wiley +1 more source
野生动物学报, 2017 根据1971～2013年北京动物园圈养平原斑马的数据,应用种群管理软件SPARKS v1.6和PMx v1.0对北京动物园斑马圈养种群进行数据整理、统计学和遗传学分析。结果显示该种群数量呈现稳定缓慢增长的状态。目前,北京动物园斑马种群面临的问题主要为性别比例偏离了斑马固有的一雄多雌的种群结构,雄性个体较多; 基因多样性丢失较快。奠基者的后代数明显不均衡,导致现今基因多样性下降至83%,并存在大量半同胞间的近亲繁殖,且现有可配对个体严重不足。1岁前是幼龄斑马的死亡高峰期,流产、死胎为死亡主要原因 ...
由玉岩 周军英 杜 洋 李 莹 曹长雷
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基于粒子群算法的海洋温差能朗肯循环系统多目标优化 [PDF]
, 2019 为提高海洋温差能发电系统的综合性能,以单位换热面积发电量和单位海水流量发电量为基础建立综合目标函数,选取蒸发温度、冷凝温度、蒸发器和冷凝器的海水出口温度为优化变量,利用粒子群算法对海洋温差能朗肯循环系统进行多目标参数优化。研究结果表明,在28℃温海水和5℃冷海水条件下,循环工质为R717时,蒸发器内的最佳蒸发温度为23.10℃,温海水出口温度为23.42℃;冷凝器内的最佳冷凝温度为12.31℃,冷海水出口温度为10.80℃;在换热器的海水进出口温差超过4℃时,换热器的海水出口温度对系统性能的影响较小 ...
张浩然, 王兵振, 王锰, 赵英汝
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Contribution of microcosm experiments to conservation science
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Microcosms, or miniature experimental systems, have been used to develop models and theories in ecology. However, their contribution to conservation science is unclear. We explored the application, design, and impact of microcosms in conservation science from 469 systematically identified articles published from 1986 to 2023.
Eleanor R. Stern +3 more
wiley +1 more source
野生动物学报, 2016 2013～2014年,在艾比湖自然保护区进行鹅喉羚资源调查时,运用粪堆计数法,对该保护区的马鹿种群资源也进行了的调查,此次调查共设置3 600个样方,发现马鹿粪便123堆。经分析显示,在艾比湖湿地国家级自然保护区内马鹿种群数量约有3到28只个体。马鹿艾比湖种群数量显示夏季少,冬季多。所以保护区要加以对马鹿艾比湖种群的保护。
先木西努·莫合德 夏米西丁·阿不都热依木 塔吉古丽·吐热甫宁礼群 马合木提·哈力克
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Zhejiang Daxue xuebao. Lixue ban, 2001 以浙江天台山特有种华顶杜鹃为研究对象，分析了它所在群落的结构Q物种组成及数量特征.在该群落中，华顶杜鹃不占优势，优势种群为阔叶箬竹、黄山松、山□和金钱松等，它们的年龄结构都属于稳定型或增长型.群落垂直结构完整，可分为乔木层、灌木层、草本层，亦有一定数量的层间植物.乔木层的物种多样性偏低，灌木层和草本层的物种多样性较高.各样地间的植物种类相似性较高.华顶杜鹃处于濒危状态，必须采取措施加以保护.
ZENGHan-yuan(曾汉元) +2 more
doaj +1 more source
Population Genetics Research of Chiloscyllium plagiosum and Scoliodon laticaudus in China's Southern Coast [PDF]
, 2008 以鲨、鳐类为代表的软骨鱼类主要生活在海洋中，大约有1100种。作为食物链的顶级捕食者和海洋生态系统的重要组成部分，软骨鱼类会对许多其他海洋生物的种群结构产生影响。因此，当软骨鱼类遭到过渡捕捞后将严重影响海洋生态系统中生物群落组成及生态环境。 研究发现，相对于硬骨鱼类，大部分鲨、鳐类具有生长缓慢、成熟期长、生殖力低的特点。这些特点导致其具有较低的内禀增长率以及在捕捞压力下较低的种群恢复能力。因此，大部分软骨鱼类种群只能承受中等捕捞强度的渔业开发，否则将导致种群数量急剧减少甚至种群崩溃 ...
陈骁
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Detecting mass mortality events in wildlife populations
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Reports in the literature of mass mortality events (MMEs) involving diverse animal taxa are increasing. Yet, many likely go unobserved due to imperfect detection and infrequent sampling. MMEs involving small, cryptic species, for instance, can be difficult to detect even during the event, and degradation and scavenging of carcasses can make ...
Jesse L. Brunner, Justin M. Calabrese
wiley +1 more source
野生动物学报, 2011 应用种群管理软件SPARKS 1.5及PM 2000 v1.214对东方白鹳的国内圈养种群进行统计分析。在有记录的36 a人工圈养的历史中,野外捕获个体在1975～1999年间是构成圈养种群的主要部分,自1984年首个圈养个体出生后,圈养出生个体数量以年平均增长率15.10%速度增长,至2000年取代野外捕获个体数量,成为目前种群发展的主要力量。截至2009年12月31日,我国共有61家动物园或机构圈养了375只东方白鹳个体。种群周期增长率λ=1.0311,性别比例为雄性:雌性=0.927 8 ...
马珺
doaj
Evolution of research on global amphibian declines
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract In the late 1980s, the scientific community became aware of severe, enigmatic amphibian population declines. These declines triggered a wave of research focused on quantifying their extent and identifying key drivers. We used text‐analysis techniques, including topic modeling and geoparsing, to examine the evolution of research focused on ...
Jordann Crawford‐Ash +6 more
wiley +1 more source