“…Lipids are needed both for the maintenance of the soma and for egg production, creating a trade-off between reproduction and survival (Roff, 1992). Optimization of lipid allocation to these two components of fitness is thus a vital life-history decision (Ellers et al, 2000;Harvey et al, 2001;Jervis et al, 2001Jervis et al, , 2003Jervis et al, , 2008Ellers & Jervis, 2003;Jervis & Ferns, 2004;Thorne et al, 2006;Keinan et al, 2018). Given that different reproductive rates are optimal in different environments, we expect resource allocation strategies to differ between environments.…”