上个月，Journal of Mammalogy接受了Mixed-speices groups of Przewalskis gazelle and Tibetan gazelle的文章，这个月，四川动物接受了 可可西里青藏铁路沿线的夏季鸟类多样性，这里上传摘要，待全文正式发表了再传pdf。 1、 NON-RANDOM MIXING BETWEEN GROUPS OF PRZEWALSKIS GAZELLE AND TIBETAN GAZELLE Zhongqiu Li ab , Zhigang Jiang b Guy Beauchamp c a Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, the Chinese Academy of Sciences, Beijing, China b College of Life Science, Nanjing University , Nanjing , China c Faculty of Veterinary Medicine, University of Montral , St-Hyacinthe, Qubec , Canada The Przewalskis gazelle, Procapra przewalskii , and the Tibetan gazelle, P. picticaudata, are two endemic, closely related and endangered ungulates of the Qinghai-Tibetan Plateau. The two species often occur in mixed-species groups in the upper Buha River of the Plateau. We studied the composition and size of their mixed-species groups over two years to determine whether such groups aggregate by chance and to determine a posteriori potential costs and benefits associated with the formation of mixed-species groups. Sex composition and size distribution were very similar in single-species groups of each species and given that population density was also similar for the two species, we expected that if mixed-species groups formed by chance, mixed-species groups would consist of an equal mix of the two species. While this was true in male and in mixed-sex groups, the proportion of Przewalskis gazelles was much larger than expected in female groups. In addition, mixed-species groups in the winter never included males of the two species. The results thus suggest that random mixing can be rejected in these two gazelle species. Mixed-species groups were larger than single-species groups of each species in all-female, all-male and mixed-sex groups suggesting that one benefit of mixed-species groups is a reduction in predation risk associated with the formation of larger groups. We also suggest that the occurrence of mixed-sex, mixed-species groups implies a potentially non-trivial risk of crossbreeding, which would represent a cost to the formation of mixed-species groups. 2、 可可西里青藏铁路沿线的夏季鸟类 李靖 1 ，葛晨 1 ，李忠秋 1 * ，徐爱春 2 ，李言阔 3 (1 ．南京大学医药生物技术国家重点实验室，南京大学生命科学学院，南京 210093; 2 ．中国计量学院生命科学学院，杭州， 310018; 3 ．江西师范大学生命科学学院，南昌 330022) 摘要 ： 2009 年 7~8 月，我们对青藏铁路沿线格拉段青海境内尤其是可可西里保护区段的夏季鸟类进行了调查。结合历史记录，该地区共计 50 种鸟类。其中留鸟 29 种，夏候鸟 20 种，迷鸟 1 种，国家一级保护 3 种，为黑颈鹤 Grus nigricollis 、胡兀鹫 Gypaetus barbatus 、金雕 Aquila chrysaetos ；国家二级保护动物 7 种，分别为猎隼 Falco cherrug 、燕隼 F. subbuteo 、红隼 F. tinnunculus 、 游隼 F. peregrinus 、秃鹫 Aegypius monachus 、 鸢 Milvus migrans 、大鵟 Buteo hemilasius 。铁路沿线的鸟类中，优势种为棕颈雪雀 Montifringillla ruficollis 和地山雀 Pseudopodoces humilis ，分别占到发现总数量 (349 只 ) 的 23.2% 和 12.0% 。常见种包括渡鸦 Corvus corax (7.4%) 、赤麻鸭 Tadorna ferruginea (7.2%) 、白斑翅雪雀 M. nivalis (6.9%) 、棕背雪雀 M. blandfordi (6.3%) 以及斑头雁 Anser indicus (6.0%) 。
标签: 藏原羚
