Results 101 to 110 of about 19,185 (257)
Drive-by Netting: a Technique for Capturing Grebes and Other Diving Waterfowl
We describe a new method (drive-by netting) for capturing grebes (Podiceps spp.) and other birds that dive under water to escape capture. We used a floating gill net to capture 203 eared grebes (Podiceps nigricollis) in 20 days in 1999 on the Great Salt ...
Joe N. Caudell, Michael R. Conover
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在鸟类行为研究方面,借助于彩色标志的方法是很普遍的,并且大多数的研究都倾向于标志对行为没有影响的假设。Frankel 和 Baskett(1963)曾用油漆标志过哀鸽(Zenaidure macroura);Goforth 和Baskett(1965)用塑料条带标志过鸠鸽;Lensink(1968)曾用颈环标志过黑雁(Branta bernical);Royall 等(1974 ...
刘培奇
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Winter Waterbird Community Composition and Use at Created Wetlands in West Virginia, USA
Information on nonbreeding waterbirds using created wetlands in the Central Appalachian region of the United States is limited. We compared waterbird communities of two managed wetlands, created in 2013 and 2001, in West Virginia.
Hannah L. Clipp +2 more
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‘Deliberate Preparation’ as an evidence-based focus for primary physical education [PDF]
There is substantial scientific research suggesting the physical and psychological health benefits of a physically active lifestyle. Consequently, governments worldwide prioritize policies, finances, and resources in healthcare, education, and sports ...
Aelterman N. +11 more
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Podejście umiarkowane w sporze o możliwość i użyteczność moraln¸a kodyfikacji norm etycznych [PDF]
Popularyzacja tworzenia kodeksów zaadresowanych do różnych grup społecznych jest jedn¸a} z cech współczesnego świata. Wśród badaczy tego zjawiska nie ma jednak pełnej zgody na zasadność i użyteczność moraln¸a} tej działalności. Artykuł przybliża przegl¸a}
Klimczuk, Andrzej
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Population and Spatial Dynamics of Resident Canada Geese in Southeastern Nebraska
In response to increasing populations, damage complaints, and a desire to understand population and spatial dynamics, we studied population size, survival rates, home ranges, movements, and site fidelity of female resident Canada geese (Branta canadensis)
Scott R. Groepper +5 more
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1999年12月20日,江西鄱阳湖国家级自然保护区的科技人员在梅西湖进行水禽调查时发现一只加拿大雁(Branta canadensis)。在30×的单筒望远镜下观察,可清晰地看到此鸟头和颈黑色,下颈有一明显的白色颈环,喉部白色,上体深褐色且有苍白色条斑,喙、脚以及尾均为黑色。尾上覆羽白色。
赵金生, 宋相金
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The Gydan Peninsula is one of the least explored and inaccessible Arctic regions in both the Yamalo-Nenetsky Autonomous Okrug and Russia as a whole. In 2016–2017 we conducted a survey of the Gydansky State Nature Reserve and adjacent areas, counted and ...
Sofia B. Rozenfeld +6 more
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六、雁形目本目主要特点是脚适于游泳;嘴通常平扁,先端具嘴甲;雄鸟具交接器。全球有146种,我国有46种。红胸黑雁 (Branta ruficollis) 属鸭科(Anatidae),英名为 Red-breastedGoose。体长约550毫米。本种主要特征是前颈至胸栗棕色,头顶、后颈均黑。此黑雁是典型的北极海洋鸟类,能耐严寒,喜栖于海湾。
谭耀匡
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Evolutionary genetics of birds IV rates of protein divergence in waterfowl (Anatidae) [PDF]
An electrophoretic comparison of proteins in 26 species of waterfowl (Anatidae), representing two major subfamilies and six subfamilial tribes, led to the following major conclusions: (1) the genetic data, analyzed phenetically and cladistically ...
Avise, JC, Patton, JC
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