Coccinellidae competition

This dataset contains count data for the number of each aphid life stage (nymphal stages 1-4 and adult) consumed by coccinellids in two lab-based experiments. The unit of observation (row) in the dataset is aphid life stage, therefore five rows correspond to one focal coccinellid. We experimentally assessed changes in feeding behaviour (prey preference and consumption rate) of native UK coccinellid species (Adalia bipunctata and Coccinella septempunctata), whose populations are, respectively, declining and stable, when exposed to the invasive intraguild predator, Harmonia axyridis. Experiment 1 determined the number of aphids consumed by each coccinellid larval stage in the absence of competition for each of the three coccinellid species. Experiment 2 then assessed the impact of competition on the number of aphids consumed by each coccinellid species.

本数据集包含两项实验室实验中瓢虫（coccinellids）捕食的各蚜虫生活史阶段（若虫1-4龄及成虫）数量的计数数据。数据集的观测单元（行）为蚜虫生活史阶段，因此每5行对应1只目标瓢虫。我们通过实验评估了英国本土瓢虫物种（Adalia bipunctata和Coccinella septempunctata，其种群数量分别呈下降和稳定趋势）在暴露于入侵性guild内捕食者（intraguild predator）异色瓢虫（Harmonia axyridis）时的取食行为变化（猎物偏好及捕食率）。实验1测定了在无竞争条件下，上述三种瓢虫物种各幼虫阶段捕食的蚜虫数量。实验2则评估了竞争对各瓢虫物种捕食蚜虫数量的影响。