Figure 6. A hypothetical (but realistic) annual budget of energy and activity of a MB=40g (lean mass)Dromiciops gliroides , summarized from descriptions of the reproductive cycle (Muñoz-Pedreros et al., 2005), seasonal variations in activity, adiposity, and body mass (Celis-Diez et al., 2012; Franco et al., 2017) and food availability (di Virgilio et al., 2014; Franco et al., 2011; Quijano, 2008). After reproduction, D. gliroidesreduce activity and energy expenditure and accumulate almost twice their body size in fat (Franco et al., 2017). Fat accumulation was estimated from body mass fluctuations using quantitative magnetic resonance, which indicated that animals could double their body mass in autumn (Mejías et al., 2022).