I see your point cubswin, but I guess I'm looking at it in a couple different ways. The above list is for 19 states, meaning there are 31 states not included (>60% of the records), so it seems selective. The other point is that while all those are less than a pound different (5lb-4.1lb), that's still almost 20% variation. Think in terms of if two guys were standing next to each other, one 6'0" and the other 4'10". You wouldn't say they are about the same height, yet they are less than 20% apart in "length".
Latitude really has very little to do with age difference. Latitude to some degree controls the length of the growing season, but isn't correlated to length of lifespan in that short of distance. The studies that I've seen actually tend to show the reverse, that fish to the north live longer, but fish to the south grow faster. There is even one study that suggests crappie stop growing in some southern waters when water temps get too warm, putting on most of their length in the spring and fall.Originally Posted by cubswin
I've got state fishery research data on various lakes and reservoirs going back close to 30 years in some cases. They've started to put a lot of it online now, but it's been kind of sporadic. I also have unlimited access to several national fisheries research journals.Originally Posted by jpdawg
-T9


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