RT Journal Article T1 Demographic trends of a reintroduced Iberian ibex Capra pyrenaica victoriae population in Central Spain A1 Refoyo Román, Pablo A1 Olmedo Salinas, Cristina A1 Polo Roldán, Ignacio A1 Fandos, Paulino A1 Muñoz Araújo, Benito AB One reintroduced population of Iberian ibex was monitored between 2000 and 2007 in the Sierra de Guadarrama National Park (Central Spain) using the distance sampling method. The densities obtained from three samplings show a significant increase between 2000 (6.57 ind./km2 ) and 2007 (33.16 ind./km2 ) despite a range extension. After an initial period of balance, the sex ratio became unbalanced over time in favor of females. The age pyramid also changed after a dramatic population increase. The birth rate oscillated at relatively high values for the species (0.69–0.99 kids/female). The group size reduced significantly over time. Females with kids dispersed from the release area significantly less than males and mixed groups. PB De Gruyter SN 0025-1461, ESSN: 1864-1547 YR 2015 FD 2015-05 LK https://hdl.handle.net/20.500.14352/23241 UL https://hdl.handle.net/20.500.14352/23241 LA eng DS Docta Complutense RD 1 ene 2026