Time series data of a guanaco population in Southern Tierra del Fuego (1977-2012)

The first column identifies the year each sample was carried out; columns 2-5 are the elements of the population projection matrix and represent the parameters the fecundity (newborn females per adult female (a13), the survival of female newborns (a21), the survival of female juveniles (a32), and the survival of female adults (a33). “Fem newborns”, “Fem Juveniles” and “Fem Adult” are the number of guanacos of each age class (the population vector) as calculated by the matrix model for each year; “Fem Population” results from the addition of the previous three columns, that is, it represents the total female population resulting from the matrix model. “Total Population both sexes (model)” is the total guanaco population (both sexes) originated from “Fem Population” multiplied by 2 (the sex-ratio in the guanacos is 1:1). “Total field population” is the total field guanaco population obtained by sampling by the Distance method (see text). “SSQ” is the sum of squares function as the goodness of fit criterion used for fitting the differences between the “Total Population both sexes (model)” and “Total field population” by changing the values of the population matrix elements (“a13”, “a21”, “a32” and “a33”). “Lambda” is the population growth rate (lambda) as estimated for each year with the PopTools “add-in” of the Excel spreadsheet based on the corresponding transition matrix of that year.

首列标识了每个样本执行的年份；第2至5列构成了人口预测矩阵的元素，并代表生育参数（每位成年雌性新生雌性数量（a13）、雌性新生儿的存活率（a21）、雌性幼崽的存活率（a32）和雌性成年的存活率（a33））。‘Fem newborns’、‘Fem Juveniles’和‘Fem Adult’分别表示按年龄划分的每一类雌性美洲驼的数量（即人口向量），这是通过矩阵模型针对每年计算得出的；‘Fem Population’是通过将前三个列相加得出的，即它代表了矩阵模型产生的总雌性人口。‘Total Population both sexes (model)’是指由‘Fem Population’乘以2（美洲驼的性别比为1:1）得出的总美洲驼种群（两性）。‘Total field population’是通过距离法抽样得到的总野外美洲驼种群数量（参见正文）。‘SSQ’是平方和函数，作为拟合“Total Population both sexes (model)”与“Total field population”之间差异的优良度准则，通过改变人口矩阵元素（“a13”、“a21”、“a32”和“a33”）的值来实现。‘Lambda’是根据每年相应的转移矩阵，利用Excel电子表格的PopTools“插件”估计的人口增长率（lambda）。