Results 31 to 40 of about 224,514 (158)

Hurricane Impacts on the Population Genetics of an Endangered Ecosystem Engineer 飓风对一种濒危生态系统工程师的种群遗传学影响

open access: yesIntegrative Conservation, Volume 4, Issue 4, Page 641-651, December 2025.
Key Largo woodrats are a small and endangered island species, whose individuals tend to occur in family groups. Isolation from mainland populations, predation, and habitat fragmentation have caused genetic drift, leading to low overall diversity. Here, we found that a major category 4 hurricane promoted genetic diversity in the Key Largo woodrat ...
Taylor Ackley   +5 more
wiley   +1 more source

基于粪便DNA分析技术的东北马鹿种群遗传学研究

open access: yes野生动物学报, 2007
目前,栖息地的破坏是野生动物处于濒危状态的主要因素之一。东北马鹿是国家重点保护动物,近年来,人类活动的干扰使其生境明显减少并呈斑块状分布,这将使东北马鹿的种群遗传结构发生变化。然而,在野生动物遗传结构研究中,传统的取样方法直接或间接地对动物造成了伤害。因此,本文以粪便为研究材料,对来自完达山地区的9个东北马鹿样品进行mtDNA序列分析,共发现29个变异位点,定义了7个单倍型,其单倍型多样性(h)平均值为0.917、核苷酸多样性(π)平均值为2.803,种群总体遗传多样性较高 ...
刘艳华, 张明海
doaj  

Genetic Confirmations of Dwarf Lemurs Across Madagascar Highlights Complex Biogeographic Patterns 马达加斯加全境鼠狐猴的遗传确认揭示了复杂的生物地理模式

open access: yesIntegrative Conservation, Volume 4, Issue 4, Page 665-674, December 2025.
Using a diagnostic mitochondrial marker gene, we document the presence of furry‐eared dwarf lemurs, a species known from Madagascar's eastern montane rainforests, in several forest fragments across the island's central highlands. These findings raise new questions about when this species colonized these sites, how they tolerate these changing and ...
Marina B. Blanco   +27 more
wiley   +1 more source

基于人工智能方法的无源光网络优化规划

open access: yesGuangtongxin yanjiu, 2001
使用人工智能方法对 PON网络拓扑结构进行优化 ,以富士通 FPX- 1 0 0 0无源光网络系统为例进行了仿真实验 ,并对遗传算法、增添算法和 Hopfield网络方法进行比较 ,仿真结果表明遗传算法明显优于增添算法和 Hopfield网络方法 .遗传算法可使网络建设代价最小化 ,它非常好地解决了 ...
陈亚华   +3 more
doaj  

Integrating Plant Tissue Culture and DNA Barcoding: Cutting‐Edge Technologies for Plant Conservation in Sri Lanka 整合植物组织培养与dna条形码技术:斯里兰卡植物保护的前沿技术

open access: yesIntegrative Conservation, Volume 4, Issue 4, Page 555-568, December 2025.
Sri Lanka's biodiversity is threatened by habitat loss, climate change, and ineffective traditional conservation methods. Integrating plant tissue culture and DNA barcoding offers scalable, precise tools for conserving rare and endemic species. This review emphasizes the potential of biotechnological approaches to enhance conservation accuracy and ...
Mylange Dona Kasundi Mekhala Gunasena   +2 more
wiley   +1 more source

Institutional Legacies and Governance Models: A Comparative Study of Broadband State Aid in Europe

open access: yesPolitics &Policy, Volume 53, Issue 5, October 2025.
ABSTRACT This article explores how historical legacies and institutional configurations impact the governance models used in implementing State aid policies for broadband in France, Portugal, Spain, and the United Kingdom. The analysis is based on historical institutionalism, focusing on path dependence, critical junctures, and gradual institutional ...
Luís Manica   +2 more
wiley   +1 more source

基于油色谱数据的变压器状态智能诊断方法

open access: yesGaoya dianqi, 2004
利用变压器的油色谱试验数据对神经网络进行训练,将训练后的神经网络用于变压器的状态诊断。同时利用遗传算法优化神经网络的结构。算例结果表明,利用遗传算法和神经网络相结合的人工智能方法可以有效地诊断变压器的状态。
戴仁昶, 赵寿生
doaj  

A Piece of the Puzzle: Evaluating the Effectiveness of the Newly Designated Qilianshan National Park (China) and Its Contribution to Snow Leopard (Panthera Uncia) Habitat Connectivity 拼图之一:评估新建祁连山国家公园 (中国) 的有效性及其对雪豹 (Panthera Uncia) 栖息地连通性的贡献

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 287-301, September 2025.
Qilianshan National Park covers approximately 40% of core snow leopard habitat patches and 50% of movement corridors between patches. Including more of these important areas within the park boundaries should be considered, as the Qilianshan National Park sits at a pivotal juncture between critical snow leopard habitat in China and Mongolia, and may ...
Aliana Norris   +6 more
wiley   +1 more source

Genetic Diversity and Phylogeographic Structure of the Edible Caterpillars of Gynanisa maja and Implications for the Sustainability of the Species in Namibia

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 405-415, September 2025.
Assessing the genetic diversity of edible insects harvested from the wild is a pre‐requisite for designing conservation and management policies. The caterpillars of Gynanisa maja (Saturniidae) are harvested in large numbers in mopane woodlands in southern Africa, where they represent a seasonal source of income and nutrition to many rural communities ...
Zwannda Nethavhani   +3 more
wiley   +1 more source

肖四海湖野生和人工放流鳜群体遗传结构分析

open access: yes, 2010
采用微卫星标记研究天然封闭型水体肖四海内鳜放流群体与野生群体的遗传差异,试图从分子水平探讨人工增殖放流群体与野生群体遗传结构的差异。结果表明:鳜两个群体在10对微卫星座位共发现有50个等位基因。其中,放流群体发现有22个等位基因,野生群体发现37个等位基因;通过He和PIC统计发现,野生群体遗传多样性明显高于放流增殖鳜,野生鳜群体表现出更丰富的遗传多样性;由杂合度检验可以看出,两个群体都呈现杂合过剩现象,经哈代-温伯格平衡检验,显示两个群体均显著偏离哈代-温伯格平衡 ...
吴旭, 李钟杰, 严美姣
core   +1 more source

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