Individual study: Dynamics and structure of European bison population in Bialowieza primeval forest
Krasinski Z.A. (1978) Dynamics and structure of European bison population in Bialowieza primeval forest. Acta Theriologica, 23, 3-48
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Provide supplementary food during/after release of captive-bred mammals
A study in 1952–1973 in a mixed forest site in Białowieża, Poland (Krasinski 1978) found that captive-bred European bison Bison bonasus provided with supplementary food after being released into the wild bred successfully and the population increased more than six-fold over 20 years. The population increased to 253 individuals (112 males, 141 females) during 20 years in which 38 captive-bred bison were released. A total of 316 births and 67 deaths were recorded. In 1952–1972, thirty-eight captive-bred bison were released from reserves into the western Białowieża Primeval Forest (580 km2 area). Supplementary food (hay) was provided each winter. Numbers of bison and the number of births and deaths in the population were counted by observers each year in 1952–1973.
(Summarised by Ricardo Rocha)