I think genetics plays a large roll in ultimate potential this has been seen in trout habitats. If only the largest trout are taken out of a particular stream the result will be a stunted population. this the resson hatterary trout do not grow large, no survival of the fittest. Another way to look at it is why don't all people grow to six feet tall and three hunred pounds.
Something else I read at one time was that striped bass do not age as we know it. They can live almost indefinitely and were being studied for this.
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