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Space use of wintering waterbirds in India: Influence of trophic ecology on home-range size
Relationship between species' home range and their other biological traits remains poorly understood, especially in migratory birds due to the difficulty associated with tracking them. Advances in satellite telemetry and remote sensing techniques have proved instrumental in overcoming such challenges. We studied the space use of migratory ducks through satellite telemetry with an objective of understanding the influence of body mass and feeding habits on their home-range sizes. We marked 26 indi- viduals, representing five species of migratory ducks, with satellite transmitters during two consecutive winters in three Indian states. We used kernel methods to estimate home ranges and core use areas of these waterfowl, and assessed the influence of body mass and feeding habits on home-range size. Feeding habits influenced the home-range size of the migratory ducks. Carnivorous ducks had the largest home ranges, herbivorous ducks the smallest, while omnivorous species had intermediate home-ranges. Body mass did not explain variation in home-range size. To our knowledge, this is the first study of its kind on migratory ducks, and it has important implications for their conservation and management [Current Zoology 60 (5): 616-621, 2014].Tsewang NAMGAIL,John Y. TAKEKAWA,Sivananinthaperumal BALACHANDRAN,Ponnusamy SATHIYASELVAM,Taej MUNDKUR,Scott H. NEWMAN - 动物学报(英文版)文章来源： 万方数据 -
上海市冬季尖音库蚊复合组现状初步研究
为研究上海市冬季尖音库蚊复合组生态学,2012年12月中旬至2013年3月中旬,在上海市7个区县(3个郊区,4个市区),每旬开展一次冬季尖音库蚊复合组调查.结果发现郊区和市区地上建筑的尖音库蚊复合组进入越冬状态,而市区地下建筑的尖音库蚊属相当一部分没有进入越冬状态,且市区地下建筑的尖音库蚊复合组吸血率与郊区和市区地上建筑越冬的蚊虫没有显著差异.周毅彬,朱江,范明秋,刘耀,张春哲,冷培恩 - 寄生虫与医学昆虫学报文章来源： 万方数据 -
青海东部麦区小麦条锈菌越冬调查初报
随着气候变暖及种植业结构的调整,青海省东部冬小麦的种植不断向高海拔地区扩展,为勘定小麦条锈菌在青海冬麦区的越冬情况,2008-2012年以青海省民和、乐都、尖扎、化隆、循化、贵德等地为试点,按照海拔梯度设立观测圃进行定点越冬观察.结果表明,一般年份小麦条锈菌在青海省东部地区海拔1 777~2 233 m均可越冬.不同年份间条锈菌能否越冬及越冬率的高低差异很大,当1月份平均气温在-8.0℃以下时,条锈菌在所有区域均不能越冬;当1月份平均气温在-5.0℃以上时,条锈菌能够越冬.此外,1-3月的降水量对小麦条锈菌的越冬也有影响.不同海拔地区条锈菌的越冬率存在一定差异,总趋势是海拔越低病菌越冬率越高,海拔越高病菌越冬率越低.姚强,郭青云,闫佳会,张贵,侯生英,陈万权 - 植物保护学报文章来源： 万方数据
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