Results 11 to 20 of about 3,682 (213)
SSR Polymorphism of Alligator sinesis and Conservation Strategy of Genetic Diversity [PDF]
, 2004 作者简介: 黄 磊( 1978- ) , 硕士研究生, 研究方向: 动物分子遗传 通讯作者。E-mail:wangyqnj@ jlonline. com[中文文摘]扬子鳄 (Alligatorsinensis)是中国特有的珍稀保护动物 ,为保护这一濒危物种 ,我国于 80年代初在安徽宣州先后建立了扬子鳄繁殖研究中心和国家级扬子鳄自然保护区 ,现饲养种群存鳄数量已达 10 0 0 0余头。为了揭示扬子鳄种群的遗传结构 ,共采集了 3 9个个体的样品 ,其中包括 6件剥制标本 ,按代系不同 ,分为野生群、
王义权, 黄磊
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Dynamics of demersal fish species diversity and biomass of dominant species in autumn in the Beibu Gulf,northwestern South China Sea [PDF]
, 2012 根据1992年、2001年和2006年秋季在北部湾进行的底拖网调查数据,对该海域鱼类的种类组成、物种多样性、优势种及其数量的变动趋势进行分析。1992年共记录鱼类171种,隶属17目77科;2001年记录鱼类156种,隶属18目71科;2006年记录157种,隶属17目67科。3个年代记录的鱼类均以鲈形目的种类数最多,其中1992年为96种(占56.14%)、2001年90种(占57.69%)和2006年89种(占56.69%)。鱼类的PIElOu均匀度指数(J')和SHAnnOn ...
孙典荣 +5 more
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Wildlife Letters, EarlyView.This graphical abstract illustrates the core message of the manuscript – that fostering a strong sense of environmental responsibility and national pride can serve as crucial tools in the protection of wildlife. At the center is a large tree symbolizing ecological balance, rooted in community values. Surrounding it are people of all ages holding hands,
Aishwarya Maheshwari +2 more
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Measures of underwater cultural heritage protection in Zhangzhou [PDF]
, 2015 目前中国水下文化遗产因盗捞行为和水域环境恶化而面临严重的困境。为了解决该难题，国家文物局启动了漳州水下文化遗产安全监控项目。项目的开展，使得水下文化遗产保护的联防联动机制初步建立，当地民众的保护意识提高。当然该项目也因当地水下文化遗产资料的不全及无切实指导工作的法律法规而进展困难。笔者通过参与该项目的调查与研究，指出各部法规在水下文化遗产保护方面存在盲点，认为水下文化遗产保护工作的开展有赖于文物保护、公安执法、海洋管理、渔业管理和环境保护五大部门法的明文规定和相关行政主管部门的协作 ...
刘璐璐
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World Medical &Health Policy, Volume 17, Issue 1, Page 167-175, March 2025.Abstract Canada implemented the legalization of nonmedical cannabis use and supply in 2018. Initial blueprints for the legalization policy framework emphasized public health protection as a priority principle and objective, including related policy design parameters and regulatory restrictions (e.g., strict access and distribution control ...
Benedikt Fischer +3 more
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The Resources and Protection of Psammophilous Vegetation on Coasts in Xiamen Guanyinshan, Fujian Province [PDF]
, 2013 作者简介:黄雅琴(1984-),女,福建三明人,硕士,研究实习员,从事海洋、海岸带生物与生态研究。E-mail:huangyaqin0728@163.com 注：李荣冠为通讯作者。E-mail:lrg19999@sina.com.cn厦门观音山海岸沙生植被资源丰富,有维管束植物135种,分属于42科113属。但是比较23年前的历史调查数据,鬣刺(Spinifex littoreus)、盐地鼠尾粟(Sporobolus virginicus)等沙滩防风浪固沙护岸先锋植物近乎绝迹 ...
丘喜昭 +4 more
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World Medical &Health Policy, Volume 17, Issue 1, Page 108-128, March 2025.Abstract South Africa has progressively established good healthcare policies and actively promotes the rights of people with disabilities. However, as the healthcare sector is moving towards value‐based care to achieve universal health coverage, it remains unclear whether South African rehabilitation policies provide sufficient guidance for delivering ...
Rentia Amelia Maart +2 more
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Predictions of southern migration timing in coastal sharks under future ocean warming
Conservation Biology, EarlyView.Abstract Projected redistribution of marine species due to ocean warming may undermine current conservation efforts. Yet, there have been few studies on how ocean warming may alter migration timing. Across 5 years of acoustic telemetry data (2018–2022), we determined environmental drivers of southward migration timing for 6 migratory shark species from
Maria H. Manz +16 more
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, 2018 在变温动物中，不同的性别决定机制可以在同一物种中共存并且发生相互转变，但由不同性别决定机制造成的雄性之间的差异及其内在机制还不清楚。在本研究中，我们利用同时具有遗传型性别决定和温度依赖型性别决定的雌核生殖银鲫（Carassius gibelio）来阐述这个问题。 通过本文的研究发现，银鲫遗传型雄性和温度依赖型雄性具有相似的雄性形态、精巢组织结构、精子结构和精子活力。然而，当雌性个体与遗传型雄性受精时，在受精卵中可以观察到精核发生解凝并与雌原核融合。与此相反的是，当雌性个体与温度依赖型雄性受精时 ...
朱要军
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Conservation Biology, EarlyView.Abstract Urgency to save species from extinction has prompted increased investment in law enforcement in protected areas. To date, such law enforcement has largely focused on increasing costs and reducing opportunities for offending. However, these resource‐intensive approaches are not always effective and can contribute to conflict between people and ...
Freya A. V. St. John +3 more
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