The actual reason is that because every bass that is born actually doesn't have a good chance of having the genetic capabilities to reach a double digit bass.  There is a video which I posted below that I got from bassresource.com, which answers your exact question.  It is a great and very informative video.  Cheers & tight lines!

 

http://www.bassresource.com/bass-fishing-videos/bass-fishing-fish-biology.html

As a big fan of Skeeter Davis, I can only reply.......

 

I wake up in the morning and I wonder,

Why everything's the same as it was.

I can't understand. No, I can't understand,

How life goes on the way it does.

That's going back in time. Thanks for the memories.

The actual reason is that because every bass that is born actually doesn't have a good chance of having the genetic capabilities to reach a double digit bass.  There is a video which I posted below that I got from bassresource.com, which answers your exact question.  It is a great and very informative video.  Cheers & tight lines!I wonder what is better for a fishery that has a 15 inch minimum limit ? Im guessing 

 

http://www.bassresource.com/bass-fishing-videos/bass-fishing-fish-biology.html

Thats a great video.Now  I wonder what would be a good practice on a lake with a 15 inch minimum. Maybe keep fish 15 to 17 inches  and not feel guilty at the cleaning station .