I will call this "Hog Theory"
"W", to make it easier to understand for you, think of it like this. I have two tanks. Tank one has a 5 year old pregnant 12 inch rainbow trout. Tank two has a 5 year old pregnant 20 inch rainbow trout.
They both layed eggs and have young uns. One year later, the young trout in tank one average 8 inches, the ones in tank two average 9 inches.
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