“…abundance, age and sex structures, fertility, mortality, etc. (Bobretsov, 2009;Gerasimov et al, 2010Gerasimov et al, , 2013Boonstra & Krebs, 2012;Rozenfeld & Sheremetyev, 2016). It is important to note that changes in characteristics of populations occur over a certain time due to consequent alterations.…”