Adelie penguin chick counts 1997-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science

This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas.本项目为一项国际协作研究，旨在调查栖息于南极洲罗斯岛（Ross Island）与博福特岛（Beaufort Island）的阿德利企鹅（Adelie penguins，学名Pygoscelis adelia）的种群地理结构、新繁殖群建立及种群动态变化。本项持续性研究将持续关注以下核心议题：限制或促进企鹅群落生长的各类资源（筑巢栖息地、食物可获得性）的相对重要性；受邻近群落间利用性竞争与干扰性竞争影响的自然历史特征（繁殖成功率、觅食投入）；对上述特征产生影响的气候因子，尤其是海冰格局；以及基于种群初始规模与地理位置调控群落生长的行为机制（迁出、迁入）。本研究涵盖已知年龄企鹅的种群普查、群落间觅食投入与觅食重叠度分析，以及换羽区与越冬区的位置识别工作。