Mr. W's EnviroBlog

Yes, the larger trout are eating the smallest.  There is a pretty wide range of genetic variety in our trout population.  The largest parr are about 2 inches, and the smallest are still under 1 inch.  While I think I am providing ample trout chow for all the fish to thrive, the largest and most aggressive trout seem to disagree!  Look carefully at the two pictures below.  While they are a bit blurry, you can see two different views of a larger trout with a tiny tail sticking out of his mouth:

First signs of cannibalism!

Yum!

Check out this short video of our parr feeding.  My they have grown!

Well, it has been about 10 weeks now since these trout were conceived.  The fish now have 6-8 dark bands on each side called parr marks, and are now called parr instead of fry.  These bands may have some function as camouflage for the young fish in the wild.  Although the picture is a bit fuzzy, you can see these marks on some of the larger fish in the foreground:

Note parr size using ruler

If you look carefully, you can also get some sense of the genetic variety in these fish.  The largest of the parr are about 1.5 inches, and the smallest around half that.  As the fish get larger and hungrier, I imagine we may start to witness some cannibalism.