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Fragmentation of terrestrial landscapes has exacerbated the need to understand the spatial requirements of organisms, especially those that undergo seasonal migrations, such as pond-breeding amphibians. Pond-breeding amphibians spend much of their li ...
While the importance of nearby terrestrial habitats is gaining recognition in contemporary wetland management strategies, it is rarely recognized that different wetlands are often diverse in their functions of meeting the annual or life-cycle require ...
Spring migration may facilitate survival and recruitment in mammals by reducing predation risk and increasing access to higher-quality forage. The Yellowstone pronghorn Antilocapra americana population (<250 animals) retains o ...
Evidence confirms that polyunsaturated fatty acids (PUFAs), arachidonic acid (ARA), eicosapentaenoic acid (EPA) and docosahexaenoic acid, DHA are involved in growth as well in pigmentation of marine fish larvae.In the present study we examined the pe ...
利用为期一年的卫星遥感温度(SABER/TIMED)资料重建了120°E子午圈内中间层和低热层大气潮汐各主要频率分量(周日、半日和8小时潮汐).这些主要频率分量随高度振幅增大,在97km高度达到显著的振幅;其中迁移性周日潮汐在97km高度出现极大振幅,然后随高度衰减.本文从考察迁移性成分和非迁移性成分各自在总潮汐中贡献角度出发,着重讨论了那些对形成该子午圈中97km高度上整体潮汐扰动起控制作用的潮汐成分.结果显示,对周日和半日频率这两种潮汐而言,迁移性成分控制了它们的总体时空分布.在春分季节,迁 ...
We use panel data methods to explore whether households in Vietnam used seasonal migration to increase their living standards during the 1990s. Using per capita expenditures as our primary measure of living standards and historical and latent network ...
Most studies on insect sperm motility have been conducted in vitro using artificial environments outside the animal’s body. Only little is known about the function of motile insect sperm at different sites within the male or female ...
Shorebirds (Charadriiformes) and their wetland habitats are under threat worldwide. While data exist for shorebird population trends for many parts of the world, two thirds of Australia’s populations have not been assessed. We repo ...
Urbanization changes bird community structure during the breeding season but little is known about its effects on migrating birds. We examined patterns of habitat use by birds at the local and landscape level during 2002 spring migration at 71 ripari ...