Results 21 to 30 of about 7,279 (159)
Sex identification methods in ardeid birds and sex ratio in the nestling populations of Little Egret and Chinese Egret [PDF]
, 2007 本实验在筛选鹭科鸟类性别鉴定分子标记的基础上，利用这种方法检测白鹭和黄嘴白鹭雏鸟种群的性别比例，分析白鹭和黄嘴白鹭的雏鸟性别与产卵顺序之间的关系，并进一步分析鹭科鸟类W染色体以及Z染色体的CHD片段序列并尝试用于亲缘关系及系统进化的研究。本文以鹳形目5种鹭科鸟类和1种鹮科鸟类的组织为实验材料，采用PCR方法扩增其性别基因相关片段，探讨鹭科鸟类性别的分子鉴定方法。通过测定3对已知性别的白鹭（Egrettagarzetta）、岩鹭（Egrettasacra）和黄嘴白鹭（Egrettaeulophotes ...
江杉
core
Conservation Biology, EarlyView.Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva +9 more
wiley +1 more source
A study on the breeding-site fidelity of Chinese egret——based on stable carbon and nitrogen isotopic analyses [PDF]
, 2015 稳定同位素技术因具有示踪、整合和指示等多项功能，以及检测快速、结果准确等特点，近二十几年来被作为一种比较成熟的技术应用于生态学及环境科学的各个领域。例如，研究生物与环境的相关关系，检测环境污染，研究动物的食性、食物构成、营养级层次、食物链及食物网结构，动物迁徙活动，农产品溯源，食品安全等方面。同时，稳定同位素技术在动物生态学研究，尤其是鸟类生态学研究中发挥了巨大的作用，解决了很多传统方法无法解决的难题。例如鸟类食性选择、迁徙路线及中途停留地选择、繁殖地忠实度等问题上。至此 ...
于小桐
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Narrative formatting, chronotopic orderings, and moralization in ex‐gay stories
Journal of Linguistic Anthropology, Volume 36, Issue 1, May 2026.Abstract Formatted stories rely on spatiotemporal cues to evoke recognizability through linearity, which prescribes a particular template for meaning‐making. This article examines stories narrated by ex‐gay members of a Christian organization in Singapore and considers how chronotopes within the stories are ordered to regiment ways of feeling for ...
Vincent Pak
wiley +1 more source
The Intersexual Differences of Sexual Dimorphism,Feeding Habits and Locomotor Performance at Different Temperatures of Southern Grass Lizard(Takydromus sexlineatus) in Zhaoqing,China [PDF]
, 2009 通过测量头、尾、体和胃检,研究肇庆南草蜥TAkydrOMuS SEXlInEATuS个体发育过程中两性异形和食性差异。南草蜥成体个体两性大小无显著差异,雄性头部显著大于雌性,两性头部大小异形可能是受到性选择压力的结果。雌雄个体食物生态位重叠度较高,两性生态位差异微弱,食性差异与两性头部异形无明显相关性。通过设计13种不同的环境温度,研究体温变化对南草蜥两性个体运动能力表现的影响。结果显示环境温度通过影响体温而影响南草蜥的运动表现,两性个体疾跑速均具有在低体温范围内随体温升高而加快 ...
徐大德 +4 more
core +2 more sources
Mating system, brood parasitism and extra-pair behaviour in the Chinese egret (Egretta eulophotes) basing on the microsatellite technology [PDF]
, 2015 动物的婚配制度影响着个体的繁殖成功率，直接关系到群体的遗传多样性和种群动态的发展变化，是保护遗传学和生态学领域中非常重要的研究内容。已有学者野外观察到黄嘴白鹭（Egrettaeulophotes）存在婚外交配（EPC）行为，然而，有关黄嘴白鹭的婚配制度、EPC的产生机制以及其是否会导致婚外父权（EPP）现象还未清楚。此外，许多集群繁殖的鸟类都存在种内巢寄生（CBP）现象，而关于黄嘴白鹭巢寄生行为的研究也尚未开展。因此，本研究围绕黄嘴白鹭的婚配制度问题，主要开展以下几方面研究： （1）对3种非损伤性样品 ...
戴宇飞
core
Integrative Conservation, Volume 4, Issue 4, Page 569-583, December 2025.Accurate species identification is critical for conserving endangered Firmiana trees in China. However, morphological similarities among closely related Firmiana species complicate its taxonomic identification. We conducted genome skimming on 62 samples representing all 10 Chinese species and discovered nrITS as the optimal DNA barcode, achieving 100 ...
Li‐Jun Yan +8 more
wiley +1 more source
Integrative Conservation, Volume 4, Issue 4, Page 555-568, December 2025.Brief summary: 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.
Mylange Dona Kasundi Mekhala Gunasena +2 more
wiley +1 more source
Veterinary Dermatology, Volume 36, Issue 6, Page 723-787, December 2025.Hyperkeratosis of (a) the footpads and (b) the nasal planum. ABSTRACT Background Canine leishmaniosis (CanL) due to Leishmania infantum remains common, and veterinarians do not always follow scientifically sound approaches for diagnosis, treatment and prevention. Objectives To provide consensus guidelines for diagnosis and evidence‐based guidelines for
Manolis N. Saridomichelakis +9 more
wiley +1 more source
野生动物学报, 2021 本研究总结了犀牛角仿冒品的研究现状。当前犀牛角的仿冒品主要包括以下几类：洞角、蹄匣、纤维聚合物、真假结合仿品和古犀角等。在这些仿冒品中，洞角的组织特征与犀牛角差别较大，鉴别二者相对容易；蹄匣、纤维聚合物、真假结合仿品和古犀角等特征与犀牛角存在很大的相似性，鉴定时存在一定难度。本研究分别指出了仿冒品与真犀牛角之间的差异或应采取的鉴定方法，将对从事犀牛角鉴定的工作人员提供一些参考。
王震
doaj