Results 21 to 30 of about 353,733 (164)

Evaluating synthetic substitutes to reduce illegal harvesting and support species recovery

Conservation Biology, EarlyView.
Abstract Providing synthetic substitutes is a widely promoted strategy to shift consumer demand away from wildlife products derived from threatened species. Yet, there is little evidence on whether product substitution prevents illegal or unsustainable harvesting and contributes to the recovery of threatened populations.
Aditya Shekhar Malgaonkar, Gareth Whittington‐Jones, Tristan Dickerson, Maswabi Lishandu, Sarah Davies, Zoe Woodgate, Xia Stevens, Choolwe Mulenga, Gift Mulenga, Mathew Phiri, Lucky Mulenga, Manyando Mukela, Gryton Kasamu, Willem A. Nieman, Gareth Mann, Abishek Harihar, Diogo Veríssimo, Rob Pickles   +17 more
wiley   +1 more source

Providing regular and frequent maps of losses and gains of farmland birds based on European monitoring data

Conservation Biology, EarlyView.
Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando, Guillem Pocull, Sara Fraixedas, Anna Gamero, David Martí, Oriol Solà, Dani Villero, Verena Keller, Petr Voříšek, Alena Klvaňová, Gabriel Gargallo, Vitalie Ajder, Marc Anton, Ainars Aunins, Dawn Balmer, Mattia Brambilla, Tomasz Chodkiewicz, Przemysław Chylarecki, Cristi Domșa, Vlatka Dumbović Mazal, Virginia Escandell, Néstor Fernández, Ruud Foppen, Juan Gallego‐Zamorano, Carlos Godinho, Irene Guerrero, Christina Ieronymidou, Frédéric Jiguet, Aleksi Lehikoinen, Primož Kmecl, Peter Knaus, Lechosław Kuczyński, Åke Lindström, Qenan Maxhuni, Blas Molina, Jean‐Yves Paquet, Maria Luisa Paracchini, Danae Portolou, Draženko Z. Rajković, Dimitrije Radišić, Jiří Reif, Paul Shimmings, Henk Sierdsema, Jovica Sjeničić, Karel Šťastný, Bård G. Stokke, Nicolas Strebel, Zoltán D. Szabó, Tibor Szép, Norbert Teufelbauer, Nicolas Titeux, Sven Trautmann, Judit Veres‐Szászkac, Thomas Vikstrøm, Lluís Brotons   +54 more
wiley   +1 more source

云南玉溪绿孔雀遗传多样性分析:与圈养种群的比较

野生动物学报, 2022
绿孔雀(Pavo muticus)是备受关注的濒危物种。我国南方曾广泛分布的云南亚种(P.m.imperator)目前收缩到中部、南部和西部的局部地区,近年来陆续开展了野外种群调查,但遗传多样性的分析和评估尚未开展。本研究利用从玉溪市新平和峨山交界处采集的野外绿孔雀自然脱落的羽毛,采用11对微卫星标记分析遗传多样性和结构,并与国内主要圈养种群(建群者来自瑞丽地区和其他未确定的地点)进行比较。结果表明:该野生种群的遗传多样性较低,受到近交的影响,遗传多样性进一步丢失的风险较高。遗传结构上 ...
刘思霞, 张馨元, 晏鸣霄, 杜焓瑜, 杨金城, 李广龙, 官文渊, 杨守庄, 徐艳春   +8 more
doaj  

Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework

Conservation Biology, EarlyView.
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift, Amanda M. Barker, William B. Driggers III, Bryan S. Frazier, Douglas H. Adams, James J. Gelsleichter, Dana M. Bethea, Bethany M. Deacy, David S. Portnoy   +8 more
wiley   +1 more source

Evaluating the use of taxonomy in the IUCN Red List

Conservation Biology, EarlyView.
Abstract Taxonomy defines the units that conservationists strive to preserve for future generations. However, the discovery of new species and the taxonomic revision of existing species affect conservation efforts. Despite the importance of taxonomy for a species’ conservation, there is currently no overview of how those leading species extinction risk
Stephen T. Garnett, Claire E. Johnston, Phil Bowles, Les Christidis, Stijn Conix, J. W. Duckworth, Aaron Lien, Frank E. Zachos, Joeri Witteveen   +8 more
wiley   +1 more source

斑苦竹无性系种群能量结构研究

, 1995
引用Ｈａｒｐｅｒ（１９７７）的构件结构理论，将四川缙云山的斑苦竹分为构件、分株和无性系种群三个层次，分别研究了它们的能量结构特征，结果表明：斑苦竹各构件单位的平均能值为枝（１８．１７８ＭＪ／ｋｇＤＷ）＞秆（１７．９６９ＭＪ／ｋｇＤＷ）＞叶（１７．５８３ＭＪ／ｋｇＤＷ）＞根茎（１７．５０５ＭＪ／ｋｇＤＷ））＞（１７．３７１ＭＪ／ｋｇＤＷ）＞根（１５．３８０ＭＪ／ｋｇＤＷ）；无性系分株的平均能值随着年龄级的增加，呈Ｌｏｇｉｓｔｉｃ曲线变化，其回归模型为：无性系种群不同龄级分株的能量配置为Ⅱ＞Ⅲ＞Ⅰ＞Ⅳ＞Ⅴ＞
钟章成, 刘庆,钟章成
core   +1 more source

Sequence analysis of mitochondrial fragment COⅡ gene of H. labeo and H. maculates from Oujiang River(瓯江流域唇和花线粒体COⅡ基因部分序列分析)

Zhejiang Daxue xuebao. Lixue ban, 2008
采用PCR技术获得了唇(Hemibarbus labeo )和花（H. maculatus）线粒体DNA细胞色素氧化酶(COⅡ)基因部分序列，将所得的COⅡ基因序列与4种取自GenBank的属鱼类同一基因序列进行了分析，以探讨这一序列在种质鉴定、种群遗传结构和分子系统发生研究中的应用价值.测序结果表明，在实际分析的600 bp序列中，序列A+T含量(56.9%~57.8%)高于G+C含量，物种间共有变异位点116个，其中简约信息位点46个；唇和花2个地理种群间变异位点均为11个，唇种群间碱基替换均为转换，
LÜYao-ping(吕耀平), HUZe-hui(胡则辉), YELi-ping(叶丽平), YAOZi-liang(姚子亮)   +3 more
doaj   +1 more source

Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal

Conservation Biology, EarlyView.
Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz, Michelle S. Ward, Jonathan R. Rhodes, Ben C. Scheele, Hugh P. Possingham, Diana O. Fisher   +5 more
wiley   +1 more source

Institutional lessons from the Nordic management model

Conservation Biology, EarlyView.
Abstract To improve wildlife management outcomes, in terms of reaching management goals and increasing legitimacy, Nordic countries have developed institutional systems involving stakeholders that aim for a more inclusive and participatory model.
Jens Nilsson, Annica Sandström, Camilla Sandström   +2 more
wiley   +1 more source

白头鹤国内圈养种群现状分析

野生动物学报, 2015
对中国白头鹤圈养种群的统计学和遗传学结果进行了相关分析,并对种群数量、年龄结构、性比情况、基因多样性、近交系数以及未来100 a种群的发展趋势进行了重点研究。结果表明:截止到2013年12月31日,中国圈养白头鹤种群共有存活个体76只,分别饲养于15家单位,其中建立者的数量为16只,潜在建立者的数量为41只。圈养白头鹤种群中育龄个体充足,但幼龄个体数量不足,种群年龄结构不是很合理。白头鹤种群保留了野生个体92.9%的基因多样性,平均近亲系数为0,是一个没有任何近亲繁殖的优质种群。通过分析发现 ...
何相宝 田秀华 李晓敏 周军英 尹惠媛
doaj