Facebook post by University of Helsinki

The largest Atlantic salmon produce the most offspring. However, there are far fewer of these fish on the spawning ground battling for reproductive success than their younger – and smaller – competitors.
Size matters in the sex life of salmon | University of Helsinki helsinki.fi

For Atlantic salmon, size matters when it comes to love. Larger males and females that may spend up to four years at sea produce many more babies, but they are very rare compared to younger fish.