Results 31 to 40 of about 1,226,395 (153)
, 2021 本发明涉及移动机器人技术领域，特别涉及一种自动适应绝缘子形状的爬行机构。包括第一框架、第二框架、开合电机组件、导向杆组件、第一夹紧机构、第二夹紧机构及平移驱动机构，其中第一框架和第二框架平行设置，并且通过多个导向杆组件连接，平移驱动机构设置于第二框架上，并且输出端与第一框架连接；开合电机组件设置于第一框架或第二框架上，用于驱动第一框架和第二框架同步张开或闭合；第一夹紧机构和第二夹紧机构分别设置于第一框架和第二框架上，用于夹紧绝缘子。本发明具有驱动电机少、运动平稳 ...
董尚群 +3 more
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Integrative Conservation, Volume 3, Issue 4, Page 342-352, December 2024.Human activity, particularly the increase in forested areas across the western Mediterranean, has impacted squamate diversity. This study investigated the impact of canopy cover on squamate assemblages, finding the highest diversity in areas with moderate tree cover.
Daniel Escoriza, Félix Amat
wiley +1 more source
野生动物学报, 2000 在最近的全国野生动物调查中,湖南莽山国家级自然保护区又发现一个新蛇种。1999年9月,经我国著名两栖爬行动物专家、IUCN/SSC中国两栖爬行动物专家组主席赵尔宓教授鉴定 ...
陈远辉
doaj
Scale of unregulated international trade in Australian reptiles and amphibians
Conservation Biology, Volume 38, Issue 5, October 2024.Abstract Reptiles and amphibians are popular in the exotic pet trade, where Australian species are valued for their rarity and uniqueness. Despite a near‐complete ban on the export of Australian wildlife, smuggling and subsequent international trade frequently occur in an unregulated and unmonitored manner.
Sebastian Chekunov +4 more
wiley +1 more source
, 2021 本发明涉及移动机器人技术领域，特别涉及一种绝缘子连杆爬行机构。包括第一连杆机构、第二连杆机构、第三连杆机构、第一框架、第二框架及框架开合驱动机构，其中第一框架和第二框架的一端通过第一连杆机构连接，第一框架和第二框架的另一端分别设有第二连杆机构和第三连杆机构；第一连杆机构、第二连杆机构和第三连杆机构可同步沿绝缘子爬行；第二框架为可开合结构，框架开合驱动机构设置于第二框架上，用于驱动第二框架进行开合动作。本发明可以简单、快捷的实现在绝缘子串上的爬行，并且控制简单 ...
董尚群, 王洪光, 潘新安
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Creating a more inclusive approach to wildlife trade management
Conservation Biology, Volume 38, Issue 5, October 2024.Abstract Global wildlife trade involves a diverse array of species. Although sustainable trade underpins livelihoods for communities worldwide, unsustainable trade, whether legal or illegal, threatens thousands of species and can lead to extinctions.
Amy Hinsley +2 more
wiley +1 more source
野生动物学报, 1988 蛇是爬行动物,其在分类系统上隶属脊索动物门,脊椎动物亚门、爬行纲、有鳞目,蛇亚目。现今世界上生存的蛇类已知有11科约400属2500种。我国有8科,即盲蛇科、蟒科、闪鳞蛇科、游蛇科、瘰鳞蛇科 ...
李春涛, 傅密宁
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Integrative Conservation, Volume 3, Issue 2, Page 112-126, June 2024.Integrating data collected by citizen scientists with data from traditional surveys improves our knowledge of reptile species distribution and richness. Data contributed by citizen scientist can inform reptile species abundance and rarity patterns in Brazil.
Lucas Rodriguez Forti +3 more
wiley +1 more source
两栖爬行动物两性大小异形研究进展/Sexual size dimorphism of amphibians and reptiles: A review[J]
, 2013 动物两性间在个体大小、形状以及体色等方面产生差异的现象被称为动物的两性异形(sexual dimorphism,SD),其中个体大小的两性异形(sexual size dimorphism,SSD)最受关注.两性异形是动物中的一种普遍现象,它反映了两性在不同选择压力作用下适应的结果.当前理论认为,产生两性异形的原因主要有3种,即性选择压力、生育力选择压力和生态位分离假说.两栖爬行动物中两性异形现象普遍存在,并且由于终身生长,两栖爬行动物个体大小的两性异形是受多种因素综合作用的结果 ...
中国科学院干旱区生物地理与生物资源重点实验室,中国科学院新疆生态与地理研究所,乌鲁木齐830011 +4 more
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A multitaxonomic assessment of Natura 2000 effectiveness across European biogeographic regions
Conservation Biology, Volume 38, Issue 3, June 2024.Abstract The Natura 2000 (N2K) protected area (PA) network is a crucial tool to limit biodiversity loss in Europe. Despite covering 18% of the European Union's (EU) land area, its effectiveness at conserving biodiversity across taxa and biogeographic regions remains uncertain.
Lorenzo Ricci +10 more
wiley +1 more source