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

我们对分布于该物种分布范围内的开普秃鹫的巢群和栖息地相关计数进行了汇总。这些数据由多个个人和机构在1970年至2020年期间收集，采用不同的收集方案，从直接观察至直升机调查不等。其中一些调查已经发表，但许多其他数据仅存在于官方或私人数据库中。我们基于最佳知识，对这些记录进行了统一，不可避免地做出了一些主观的决策。例如，我们需要识别具有不同名称但来源相同的重复巢群，或虽位置略有不同但实质相同的巢群。我们提供了多年来平均成年个体数量（avg_ad）和平均非成年个体数量（avg_juv），以概览巢群规模。巢群数据通常包括成年个体数、繁殖对数或巢穴数。当成年个体数缺失时，我们通过将繁殖对数或巢穴数加倍来估算成年个体数。当巢群中的非成年个体数缺失时，我们根据Piper（1993*）的方法进行估算，他认为种群中繁殖鸟类的比例约为0.75。该文件为.csv格式，可使用多种软件打开，从电子表格软件如Excel到统计软件如R。为了消除对该物种造成伤害的敏感信息，例如巢群名称和位置，原始数据集已进行了修改。有意获取完整数据集的合格研究人员可联系副教授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