基于红外相机的不可个体识别动物种群密度估算方法

李珍珍, 杜梦甜, 朱原辛, 王大伟, 李治霖, 王天明

A practical guide for estimating the density of unmarked populations using camera traps

Zhenzhen Li, Mengtian Du, Yuanxin Zhu, Dawei Wang, Zhilin Li, Tianming Wang

图2 相机以类似动物速度运动所覆盖面积(A)和动物从6个典型角度接近相机探测区域的剖面图(B) (修改自Rowcliffe et al, 2008)。A图中阴影部分为圆形区域以动物运动速度移动时所覆盖的面积, 其中v为动物运动速度(m/h), H为相机工作时间(h), R为圆形区域的半径(m)。B图中扇形表示相机探测区域, R为相机探测区域半径(m), θ为相机探测区域角度, 箭头表示动物接近相机探测区域的方向, 动物接近相机探测区域的剖面用橙色粗线表示。

Fig. 2 Coverage area of a camera moving at a speed similar to that of an animal (A) and the profile of an animal approaching the probe area from six typical angles (B) (Modified from Rowcliffe et al, 2008). The shadow part in A is the area covered by the circular region moving at the animal speed, where v is the animal speed, H is the camera working time, and R is the radius of the circular region. In B, the sector represents the camera detection area; R is the radius of the camera detection area; θ is the angle of the camera detection area; the arrow indicates the direction of the animal approaching the camera detection area; and the profile of the animal approaching the camera detection area is represented by orange rough line.