SSF_ImmediateFlight_NextNight

Data used to asses the step selection function (SSF) of zebras using the immediate-flight tactic the next night after an encounter with lions (question 4). Column headings: id = id of zebra, FakeTime = 2-case, case = binary variable with 1 for an observed step and 0 for a random step, strata = id of the stratum where an observed step is paired with 10 random steps, cluster = id of the cluster (group of non independent strata) used for robust variance, TacticCont = categorical variable indicating if the step occurred after an encounter ("Tactic") or during the proactive phase ("Control"), Grassland = binary variable with 1 if the step ended in grassland and 0 if not, Bushland-1 = binary variable, Bushland-2 = binary variable, Bushland-3 = binary variable, Woodland = binary variable, Spline1-4 = spline variable for step length in m, Step Length = length of the step in m.本数据集用于评估斑马在遭遇狮子后次日夜间采取即刻逃逸策略时的步选择函数（step selection function, SSF），对应研究问题4。各字段的含义如下： 1. id：斑马个体编号； 2. FakeTime：2-case变量； 3. case：二分类变量，取值1代表观测到的移动步，取值0代表随机生成的移动步； 4. strata：层编号，每个观测步将与10个随机步配对并归入该层； 5. cluster：聚类编号，即用于稳健方差估计的非独立层组的标识； 6. TacticCont：分类变量，用于标识该移动步是发生在遭遇狮子事件之后（"逃逸策略组"）还是主动活动阶段（"对照组"）； 7. Grassland：二分类变量，若移动步的终点位于草原则取值为1，否则为0； 8. Bushland-1、Bushland-2、Bushland-3：均为二分类变量； 9. Woodland：二分类变量； 10. Spline1-4：以米为单位的步长样条变量； 11. Step Length：以米为单位的移动步长度。