Figure 2. Relative abundance of Atlantic salmon (%) as compared to brown trout ().

The diagonal solid lines represent equal interbreeding success rates between Atlantic salmon () and brown trout (). Black or white dotted lines delimit the extinction area of Atlantic salmon and brown trout population, respectively. ω_S = ω_T indicates equal fitness for Atlantic salmon (ω_S = 1) and brown trout. ω_S<ω_T indicates that Atlantic salmon has a 20% fitness reduction (ω_S = 0.8). ω_S<<ω_T indicates that Atlantic salmon has a 40% fitness reduction (ω_S = 0.6). In a), c), and e), Atlantic salmon and brown trout do not compete. In b), d), and f), Atlantic salmon and brown trout have density-dependent competition. The data presented correspond to the situation after 100 time steps (years).