A utilization distribution for the global population of Cape Vultures Gyps coprotheres to guide wind energy development: colony data

We collated counts associated with Cape Vulture's colonies and roosts throughout the species distributional range. These data were collected by multiple individuals and organisations between 1970 – 2020, with varying protocols, ranging from direct observation to helicopter surveys. Some of these surveys were already published, but many others appear only on official or private databases. We unified these records into a common dataset, not without making some subjective decisions, based on our best knowledge. For example, we had to identify duplicated colonies with different names depending on the source, or colonies that were the same but located in slightly different locations. We provide the average number of adult individuals (avg_ad) counted over the years, and the average number of non-adult individuals (avg_juv) counted over the years to give an idea of the size of the colonies. Colony data typically had counts for the number of adults, breeding pairs or nests. To estimate the number of adults, we doubled the number of breeding pairs or nests, when adult counts were missing. When the number of non-adults at a colony was missing, we estimated it following Piper (1993*), who suggested that the proportion of breeding birds in the population is around 0.75. This file has a .csv format and can be opened with a variety of software, from spreadsheets such as Excel to statistical software such as R. The original dataset has been modified to remove sensitive information such as colony names and locations, because different froms of persecution are a sad reality for this species. Access to the full dataset may be requested by qualified researchers from Associate Professor Arjun Amar ([e-mail]) * Piper, Steven Edward. 1993. “Mathematical Demography of the Cape Vulture.” PhD thesis. University of Cape Town. https://open.uct.ac.za/handle/11427/19843

我们汇编了覆盖海角秃鹫（Cape Vulture）全分布范围的繁殖群与夜栖地数量统计数据。这些数据由多个个人与机构于1970年至2020年间收集，调查方法各异，涵盖直接观测至直升机调查等多种形式。其中部分调查成果已公开发表，其余绝大多数仅收录于官方或私人数据库中。我们基于自身专业认知对这些记录进行整合以构建统一数据集，过程中不可避免地做出了若干主观判断。例如，我们需依据不同来源识别同名异指的繁殖群，或是位置存在细微差异实则为同一群体的繁殖群。本数据集提供了多年统计的成年个体平均数量（avg_ad）与非成年个体平均数量（avg_juv），用以体现各繁殖群的规模。繁殖群数据通常包含成年个体数、繁殖对数量或巢穴数量的统计项。当成年个体数量缺失时，我们通过将繁殖对或巢穴数量翻倍的方式估算成年个体数；当某繁殖群的非成年个体数量缺失时，我们参照Piper（1993*）的研究进行估算——该研究指出种群内繁殖鸟类的占比约为0.75。本数据集文件采用.csv格式，可通过各类软件打开，包括Excel等电子表格软件及R等统计分析软件。原始数据集已完成脱敏处理，移除了繁殖群名称与位置等敏感信息，原因在于该物种正面临多种形式的人为迫害，这已是令人痛心的现实。符合资质的研究人员可联系阿琼·阿玛尔副教授（[e-mail]）申请获取完整数据集。* Piper, Steven Edward. 1993. 《海角秃鹫的数学种群动态》博士学位论文. 开普敦大学. https://open.uct.ac.za/handle/11427/19843