Camera trap summary - Cocha Cashu Biological Station, Manu National Park, Peru

This dataset has camera trap station ID's as rows and camera trap set up and species record summaries as columns:

n_species = The total number of species captured at the camera station during the camera trapping period.

setup_date = The date the camera trap was installed and turned on.

first_image = The date the first image was taken.

last_image = The date the last image was taken.

retreival_date = The date the camera trap was turned off and taken down.

n_nights_total = The total number of nights the camera trap was out in the field.

n_nights_active = The total number of nights the camera trap was operational in the field.

n_cameras = The number of camera traps at the camera station.

species =  Species captured (common names), including birds.

n_events = The total number of independent capture events of the species.

relabund = The relative abundance of the species.

Data was collected using camera traps in Manu National Park, Madre de Dios, Peru at Cocha Cashu Biological Station (2019, July-August, dry season).  Camera ID codes include code "CT_No." , for single traps or "Name_PCT" for paired traps. Single traps were spaced 500m in a regular grid, and paired traps were placed inside the grid originally part of an individual jaguar identification study. Traps were installed 30 - 60 cm above the ground on a tree on access trails and were active for 24 hrs/day. Trapping effort was 1,312 trap nights.  

Independent species capture events, dates, and times were extracted in R statistical programming language using the Camtrap R package.  Photos of the same species within the same hour were excluded to maintain independent capture events. The relative abundance for each species was calculated as the number of independent capture events divided by the total number of nights each camera was active and then the result was multiplied by 100.

本数据集以相机陷阱（camera trap）监测站编号为行，以相机布设信息与物种记录汇总为列：

n_species：该相机陷阱监测站在监测周期内捕获的物种总数。
setup_date：相机陷阱安装并启动的日期。
first_image：首张红外影像的拍摄日期。
last_image：末次红外影像的拍摄日期。
retrieval_date：相机陷阱关停并撤下的日期。
n_nights_total：该相机陷阱在野外部署的总夜数。
n_nights_active：该相机陷阱在野外正常运行的总夜数。
n_cameras：该监测站部署的相机陷阱数量。
species：捕获的物种（通用名称，含鸟类）。
n_events：该物种的独立捕获事件总数。
relabund：该物种的相对丰度。

本数据集的相机陷阱监测数据采自秘鲁马德雷德迪奥斯大区马努国家公园内的科卡卡舒生物站，监测时段为2019年7-8月旱季。相机编号规则如下：单个相机使用"CT_No."格式编码，成对相机使用"Name_PCT"格式编码。单个相机以500米间距按规则网格布设，成对相机则布设于原本用于美洲豹个体识别研究的网格区域内。相机安装于步道旁的树木上，离地高度30至60厘米，每日24小时持续运行，总监测陷阱夜数为1312夜。

物种独立捕获事件、拍摄日期与时间均通过R统计编程环境结合Camtrap R包提取。为保证捕获事件的独立性，同一小时内拍摄的同一物种照片将被剔除。各物种的相对丰度计算方式为：独立捕获事件数除以对应相机的总运行夜数，再将结果乘以100。