Results 41 to 50 of about 17,222 (205)
Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Conservation Biology, EarlyView.Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller +29 more
wiley +1 more source
A Case Study on the Evolution Mechanism of Ambidextrous Competence of Business Incubator among Entrepreneurial Incubation Ecosystem [PDF]
, 2016 科技企业孵化机构在扶持区域创业创新活动中的重要性不言而喻。在中国经济转型的大背景下，创业活动之繁荣前所未有，原先服务单一的孵化机构已无法适应创业企业多样化的需求，正在积极向多方资源整合者的角色转变。在实践中，转型成功的孵化机构身上普遍具有同时开展利用式创新和探索式创新的双元能力。因此探索孵化机构发挥双元能力的过程，对促进我国孵化行业发展以及营造区域良好创业孵化生态至关重要。然而学界尚缺乏对孵化机构的双元能力的动态研究，导致科技孵化机构的孵化实践缺乏理论指导而陷入盲目摸索的尴尬状况 ...
许婷
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Hobbyist preferences for pet freshwater turtles
Conservation Biology, EarlyView.Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao +7 more
wiley +1 more source
野生动物学报, 2022 为有效保护浙江长兴尹家边扬子鳄保护区扬子鳄(Alligator sinensis)种群,丰富野放扬子鳄的遗传多样性,利用13个微卫星标记分析了该种群的遗传多样性,比较核心区和野放区种群的遗传多样性差异。结果显示:保护区扬子鳄种群共检测到31个等位基因,其中含2个稀有等位基因。野放区种群的平均有效等位基因数量(1.82)、平均观测杂合度(0.49)、平均期望杂合度(0.43)、平均多态信息含量(0.34)和平均香农信息指数(0.64)均低于核心区(1.89、0.52、0.46、0.37和0.70 ...
方黎明 +8 more
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, 2012 利用泥鳅(Misgurnus anguillicaudatus)的微卫星引物跨种扩增大鳞副泥鳅(Paramisgurnus dabryanus),通过家系扩增、PCR产物测序筛选出6个座位,用于大鳞副泥鳅7个野生群体的遗传结构分析。结果显示,群体的平均等位基因数在3.167～4.833,平均观测杂合度(Ho)在0.248～0.417,平均期望杂合度(He)在0.379～0.505,多个座位存在零等位基因、杂合子缺失现象,显示大鳞副泥鳅种群遗传多样性较低。采用UPGMA法对7个群体基于DA遗传距离进行聚类,
俞小牧, 游翠红, 童金苟
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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
Zhejiang Daxue xuebao. Lixue ban, 2003 以窝卵数、卵大小(长径和短径)、卵重量和窝卵重为指标,对7个北草蜥地理种群的繁殖特征进行聚类分析.结果表明:不同地理分布的北草蜥种群的繁殖特征可明显分为福建宁德、浙江洞头岛和浙江丽水类群,浙江北麂岛、安徽滁洲、浙江东阳和浙江杭州类群.其中,浙江北麂岛种群与安徽滁洲种群的繁殖特征尤为相似.
DUWei-guo(杜卫国) +2 more
doaj +1 more source
Study on dispersal patterns of two introduction populations of Sonneratia apetala [PDF]
, 2016 摘要 本研究通过对雷州附城和泉州泉港两个无瓣海桑引种种群进行野外调查、种群遗传结构分析及交配系统(亲本分析、花粉流及种子流)、种子萌发特性等方面的研究，探讨两个种群当前扩散格局的形成机制。 野外调查结果显示，泉州样地未发现无瓣海桑幼苗及幼树的散布，说明样地种群难以自然更新；雷州样地无瓣海桑引种林出现沿小河河道向上游大规模扩散的现象，其中河道上游扩散样方（20m*100m）散布着18株无瓣海桑幼苗、34株幼树、23株小树及2株大树；中游扩散样方（20m*100m）内分布着16株幼苗、20株幼树 ...
于庆阳
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In vitro culture, cryopreservation, and field reintroduction of the endangered Mingan thistle
Conservation Biology, EarlyView.Abstract Current plant conservation efforts are hindered by, for example, poor seed germination, low viability, and insufficient propagation and preservation technologies. To address these problems, we devised an approach to plant conservation that integrates conservation, preservation, and restoration (CPR), which uses advanced in vitro techniques. We
Mukund R. Shukla +4 more
wiley +1 more source
野生动物学报, 2015 物种谱系是种群管理的必要前提,大猩猩被列为IUCN极危物种。中国动物园大猩猩圈养种群始于1973年,截至2013年12月31日,共有8只存活个体。为了更好地科学管理中国动物园大猩猩圈养种群,对收集到的大猩猩中国区谱系及其扩展谱系进行了统计学与遗传学分析。结果表明,种群平均增长率λ=0.968,呈下降趋势。种群奠基者共14只,潜在奠基者1只。种群保留了野生个体87.24%的基因多样性,无近亲繁殖情况。根据现状分析结果,中国动物园大猩猩圈养种群是一个极小的种群,该种群的发展壮大有待于加强国内自身繁殖 ...
廖 辉 袁 梨 殷毓中 张邓华 姚 勇 钟 灵 周 俊
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