Results 41 to 50 of about 17,236 (163)
Regulatory compliance and support for altered management of the exotic pet trade
Conservation Biology, EarlyView.Abstract Globally, the exotic pet trade has contributed to species invasion, disease, and animal welfare risks. Although scientists have advocated for increased trade regulation, the success of management and regulatory efforts depends on compliance by participants in the exotic pet trade. We used a regulatory compliance framework to investigate exotic
Elizabeth N. Pratt +3 more
wiley +1 more source
野生动物学报, 2018 根据上海动物园斑嘴环企鹅(Spheniscus demersus)种群的谱系及相关数据,编制生命表,基于VERTEX10.2.5对该种群未来100年的动态进行模拟,进而为种群发展提出管理建议。结果显示在理想条件下,无近交、无灾害、无密度制约,种群呈持续增长状态,灭绝概率为0,种群数量将达到138只。而在实际情况下进行模拟,则不容乐观。种群衰退,100年后灭绝概率为95.8%,因此针对该种群现状有针对性地提出保护管理措施刻不容缓。
刘芳远 黄康宁 刘群秀 田秀华
doaj
Taxonomic and functional diversity of urban bees of the world
Conservation Biology, EarlyView.Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso +10 more
wiley +1 more source
野生动物学报, 2018 筛选了10个微卫星位点对长白山北部地区的7个西伯利亚狍的局域种群进行遗传多样性和遗传结构分析。研究结果表明,7个西伯利亚种群遗传多样性水平均较高。等位基因数在7.3～11.1之间,平均等位基因数为8.95。等位基因丰富度整体水平较高,为7.5。观测杂合度和期望杂合度变化范围在0.7～0.76之间,种群遗传一致性较低,种群遗传多样性丰富、变异程度较高。7个种群中,仅黄泥河种群的Fis值为负值(-0.01),其余6个种群的Fis值均大于0,在0.021～0.061之间,表明种群内部可能存在一定程度的近交 ...
盛清宇 孙铁铎 张崇颖 罗理杨 姜广顺
doaj
Conservation Biology, EarlyView.Abstract Bycatch in fisheries is one of the most serious threats to pelagic seabirds, causing major population declines. Mitigation measures can reduce bycatch substantially, but many fisheries fail to apply best practices, and seabird mortality remains high.
V. Warwick‐Evans +2 more
wiley +1 more source
四川大学学报. 自然科学版, 2010 在九寨沟国家级自然保护区6类森林群落中设置样方对华西箭竹(Fargesia nitida)种群进行了取样,对2002年和2007年同一群落中华西箭竹的种群密度、平均高度和平均生物量的差异进行了统计检验.发现5年中,青杄林群落中箭竹平均高度增加,巴山冷杉林群落中箭竹平均生物量增加,白桦林群落中箭竹种群密度下降,而油松-红桦林、铁杉-糙皮桦林和红桦林群落内华西箭竹的种群密度、平均高度和平均生物量没有显著变化.这些结果说明九寨沟自然保护区内华西箭竹种群生长基本处于停滞状态.华西箭竹具有一个下降种群的年龄结构 ...
张聪 +5 more
doaj
Using customs data to understand overlooked trade in non‐CITES birds between Africa and Asia
Conservation Biology, EarlyView.Abstract The international trade in live birds poses risks to animals, people, and biodiversity. To effectively mitigate these risks, decision‐makers require information on the volume, dynamics, and direction of trade. Despite Africa once being the largest exporter of birds by region, very little data exist on recent trade in live birds not listed on ...
Alisa Davies +4 more
wiley +1 more source
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 +17 more
wiley +1 more source
野生动物学报, 2003 4.连接各个种群 生境的变化往往造成种群的破碎化,形成岛屿化的小种群。许多生态学家建议维护或建立小种群间的景观连接带,降低种群破碎化的影响。保护生物学方面的最新文献支持了在种群中心地带建立“走廊带”这一理论。走廊带是动物从一个生境斑块到另一个生境斑块进行日常性的、季节性的扩散性移动的旅行通道,从理论上讲,走廊带有利于种群间个体相互交流,大大减少因近交和偶然发生自然灾害引起绝灭的可能。
高中信, 刘元
doaj
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