A number of teachers have reported that some of their eggs have already hatched. This morning Bob Wible sent me these pictures.
I'll ask Jeremy Whalen to give us his opinion, but I assume that, even under ideal conditions, a certain percentage of premature births is normal. Think about it, what percentage of 200 human births might result in premature delivery?
In addition, if some of our egg batches got overdosed with iodine, that could very well cause a higher rate of "preemies."
And the eggs in the top picture above appear otherwise healthy. So I wouldn't worry if a small number of eggs hatch this early. But I wouldn't necessarily expect alevin hatching this soon to survive. Those of you who experience early hatching will have to tell us how those preemies do.
P.S.: After I wrote the above post this morning, Jeremy responded via e-mail with the following:
I believe DI-wise they should be over 40 now at 47 degrees or so. Keep in mind the 58% DI is 90% hatch if you look back on the sheet, so it's possible for hatch to slowly start happening. The picture of the one fry I did open looked good and healthy to me.
Joe Mark, Lead Facilitator, Vermont Trout in the Classroom
In June 2012, I retired after 40 years in higher education, having spent the last 32 years of my career as dean at Castleton. One of the first things I volunteered to do in retirement was to work with Jim Mirenda to help the Dorset School, where his kids and my Vermont grandkids attend, start a TIC program. Gradually that commitment grew into my current role, which is both demanding and highly rewarding.