Results 21 to 30 of about 17,236 (163)

Jaguar Densities and Land Cover Change in a Multi‐Use Landscape: A 10‐Year Comparison in the Colombian Llanos 美洲豹种群密度与复合用地景观下的土地覆被变化:哥伦比亚亚诺斯地区10年比较研究

open access: yesWildlife Letters, EarlyView.
We used spatially explicit capture‐recapture to estimate jaguar densities in a private reserve in the Colombian Llanos and quantified land cover change in and around the reserve from 2014 to 2024. Densities increased 22% since 2014, while disturbed land cover increased by 39%–54% around the reserve depending on buffer distance. Our study indicates that
Valeria Boron   +7 more
wiley   +1 more source

基于简化基因组测序的麋鹿遗传资源多样性及种群结构分析

open access: yes野生动物学报, 2023
奠基者效应会打破种群遗传结构,使原有种群动态特征失去平衡,加剧遗传多样性的丧失,严重影响物种重引入的遗传多样性和遗传结构。中国麋鹿(Elaphurus davidianus)奠基种群为北京南海子麋鹿苑和江苏大丰麋鹿国家级自然保护区两大种群。为分析中国麋鹿奠基者效应,探究资源遗传多样性及种群结构,揭示中国麋鹿适应环境的遗传机制,以中国两大麋鹿奠基种群为研究对象,基于简化基因组测序,研究北京和江苏2个地区麋鹿的遗传多样性、种群遗传结构及亲缘关系。结果表明:2个种群(18只)共筛选出高质量多态性SNP位点1 ...
张树苗   +9 more
doaj  

Molecular phylogeny of Altun Mountain wild Camelus bactrianus revealed by partial cytochrome b gene sequences of mitochondrial DNA(基于线粒体细胞色素b基因序列的阿尔金山野生双峰驼分子系统发育研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2008
目前对于野生双峰驼作为一个独立种的有效性还有着较多争议.研究测定了2头阿尔金山野生双峰驼个体的线粒体细胞色素6基因序列,并结合已有的双峰驼细胞色素b基因序列进行了系统发育分析.结果表明:现有的双峰驼分为2个种群:新疆种群和甘肃种群;2个种群间的遗传距离为2.4%~3.0%,尚未达到种间水平;阿尔金山野生双峰驼属于新疆种群,不能作为一个独立的有效种.
ZHANGYong(张勇)   +3 more
doaj   +1 more source

Looking at Us Through Their Eyes. The Analytical Process from Ethnographic Perspectives1

open access: yesJournal of Analytical Psychology, EarlyView.
Abstract This article looks at the analytical situation through the Others’ eyes—through examples from contemporary ethnographies of foreign cultures. It discusses the following issues: a) The analogy between the ontological worlds of the dead, ghosts, animals and dreams in “primitive populations” and the analytical psychological descriptions of the ...
Stefano Carta
wiley   +1 more source

卧龙国家级自然保护区羚牛同域分布地栖动物群落内种间关联度

open access: yes野生动物学报, 2021
使用红外相机技术于2017年2月—2018年4月所获数据对卧龙羚牛(Budorcas taxicolor)及其同域地栖动物进行空间关系分析,建立物种的空间关联网络,旨在探讨羚牛与其群落的关系现状。结果显示:①在研究区域发现的35种动物中,20种构成1个包含羚牛、川金丝猴(Rhinopithecus roxellana)、大熊猫(Ailuropoda melanoleuca)等重要物种的空间网络。②海拔、地形、生境类型和植被覆盖度对羚牛分布没有限制作用,表明羚牛分布区可以在不同海拔上下移动 ...
杨虎 1 李君 1 姜楠 1 施小刚 2 王鹏彦 2 李兆元 1
doaj  

Inferring alternative ecosystem states with field survey data

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen   +10 more
wiley   +1 more source

内蒙古贺兰山马鹿的种群数量及种群结构

open access: yes野生动物学报, 2021
为了掌握内蒙古贺兰山国家级自然保护区内马鹿(Cervus elaphus)的种群数量和种群结构,维护内蒙古贺兰山的生态平衡。于2017年11—12月,2018年4—6月、11—12月,2019年4—6月,在内蒙古贺兰山国家级自然保护区内,利用样线法对保护区内的马鹿进行调查,采用Distance R进行数据分析,估测种群数量和种群密度,并对种群结构进行探讨。研究发现,马鹿在2018年冬季种群数量最高约为2452(1678—3578)只,种群密度为3705(2539—5048)只/km2,遇见率为1 ...
孙萍黄师梅苏云孟德怀张致荣滕丽微刘振生
doaj  

When and why to give shorebirds a head start

open access: yesConservation 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

海南坡鹿迁地保护现状与建议

open access: yes野生动物学报, 2007
迁地保护的海南坡鹿种群可以分为野放、半野放和圈养等3种主要类型。野放种群个体数量最多,约占迁地保护种群个体总数的55.3%;其次为半野放种群,其个体数量占35.6%;圈养种群个体数量最少,只占9.1%。半野放是一种较为稳妥的坡鹿种群恢复方式。在海南坡鹿的迁地保护中,应该增加半野放种群个体数量。本文就海南坡鹿的迁地保护提出了7点保护管理及科学研究建议。
卢学理, 袁喜才, 李善元, 张海
doaj  

中国麋鹿种群现状分析及保护对策探讨

open access: yes野生动物学报, 2020
麋鹿自1985年重引进中国以来,经过繁殖扩群、行为再塑和野生放养试验3个阶段后,种群数量从79头发展至近7 000头(2018年底),先后形成江苏大丰、湖北石首和湖南洞庭湖野生麋鹿种群。通过对中国麋鹿种群发展现状调查分析,指出目前麋鹿种群健康发展面临的挑战和威胁因素,在扩大奠基种群数量、实施栖息地正向干预、加强疫病防控、开展基因交流等方面探讨中国麋鹿种群健康发展对策。
王立波 1 姜 慧 2 安玉亭 2 杨禹治 3 原宝东 4
doaj  

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