Existing theories do not explain sex ratio variation at birth in monomorphic roe deer (Capreolus capreolus)

摘要: The phenomenon of skewed sex ratios at birth has been reported in many ungulate species. So far, no consistent trend emerged for roe deer (Capreolus capreolus), because male-biased, female-biased and equal have all found. Nevertheless, both the Trivers-Willard hypothesis theory local resource competition gained support. Despite great number studies carried out regarding ecology deer, too aspects remain unclear, contradictory results produced with respect to several crucial elements. Without further research, discussion on which applies will therefore inconclusive. We put forward argument that eventually theories can be considered as being not essentially different. After all, explain observed due effect progeny's mother's body condition hence her reproductive success subsequent years. Furthermore, neither is likely prove suitable assumptions are unlikely met. In probably only a temporal character. As matter fact, observations birds mammals did withstand accumulation data, were initially believed biased turned long term. This case well. hypothesize r-strategists, produce offspring possible, regardless sex.