even tho the canada bass have a shorted growing season you still dont here of many 5 pounds being caught there. Yes envrionment and food comes in as a main factor but so does the genetics. Take humans for an example there is a whole island of people that are smaller then average. Are they still people, yes they are. I believe its an island in indonesia if any ones wondering, national geographic did a story/ show about them. Look at how people from different countries live longer or grow taller Why is this? this is because of genetics!