Rauer Group Petrels. Breeding distribution and abundance of surface-nesting petrels in the Rauer Islands, East Antarctica.

Previous exploration and ornithology in the Rauer Group are reviewed. Estimates of the nesting populations of southern fulmars and Antarctic petrels are compared with censuses conducted in 1983/84 and 1984/85. Population estimates varied considerably between years, and within the same year between different observers. To remedy this situation the three islands with sympatric breeding populations of the two species were divided into counting units, which are detailed with photographs. The total populations of surface-nesting petrels are in the order of 14000 pairs of fulmars, 2500 pairs of Antarctic petrel and 400 pairs of cape petrels. Chick survival was estimated at the time of banding and varied considerable between species, islands and years. The fields in this dataset are:Location: Filla Island, Buchan Island and Hop Island Southern Fulmar Antarctic Petrel Cape Petrel Birds Counted Estimated Pairs Population Estimates Chick survival Occupied Nests Number of Birds Conversion factor

本研究回顾了劳尔群岛（Rauer Group）既往的探险与鸟类学研究工作。研究将南方暴雪鹱（Southern Fulmar）与南极海燕（Antarctic Petrel）的巢群种群数量估算值，与1983/84、1984/85两个年度开展的普查结果进行了对比。不同年度间的种群估算值差异显著，同一年度内不同观测者的估算结果也存在较大偏差。为改善这一问题，研究人员将两种鸟类存在同域繁殖种群的三座岛屿划分为若干计数单元，并辅以照片对各单元进行详细说明。地面筑巢海燕的总种群规模大致为：南方暴雪鹱约14000对，南极海燕约2500对，海角海燕（Cape Petrel）约400对。雏鸟存活率在环志阶段进行了估算，且不同物种、不同岛屿以及不同年度间的存活率差异显著。本数据集包含以下字段：采样地点：菲拉岛（Filla Island）、布坎岛（Buchan Island）与霍普岛（Hop Island）；南方暴雪鹱；南极海燕；海角海燕；观测鸟类数量；估算配对数；种群数量估算值；雏鸟存活率；已占用巢位；鸟类个体数；转换系数。