Re: Proof!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BobinNC</div><div class="ubbcode-body">Bergmann's rule
(ecology)
The principle that in a polytypic wide-ranging species of warm-blooded animals the average body size of members of each geographic race varies with the mean environmental temperature. Another way of say this is: larger animals have a lower surface-area-to-volume ratio, allowing them to retain more heat and fare better in cooler climes.
Meaning the colder the climate, the larger the mammal. I figure it gets pretty cold in Alaska. So a red fox in Alaska would be much larger than a red fox in say North Carolina.
</div></div> Bergmann's rule is only a part of the equation. The winter temps here in Kodiak average around 30-50 degrees warmer in the winter than northern Minnesota. Were having a cold snap, 20 degrees above zero. Northern Mn, it's been well below zero for several weeks already. I trapped a few back in MN before I moved here, and a fox over 15lbs there is unheard of. I am to believe it is a genetic factor combined with an extremely rich food source. Our brown bears are the same way. Inland, a big one is 900lbs. Here, 1,400lbs is not unheard of. The food source led to bigger animals, and time caused the genetics to change. That's my thinking, validated by a biologist friend. Either way, I am having a ball! I wish I knew how to call these in. If you had some predator calling skills here you would have a lot of action.