Thursday, November 20, 2014

Brook Trout Eggs are Hatching

We popped newly hatched alevins onto out classroom digital projector, at Northeast Elementary. 

Brook trout eggs are about 4mm in diameter, while newly hatched alevins are about 9mm in length.  How does that alevin fit into that egg?? 

Do The Math:  The internal (inside the eggshell) diameter of the eggs is probably about 3mm.  Calculate the circumference of that internal space by multiplying the 3mm diameter by Pi (3.14).  You get just over 9mm!

Wednesday, November 12, 2014

Brook Trout Egg Delivery Day - Mission Accomplished!

With the help of Justin and Gian from US Fish and Wildlife Service, and Ryan at DEC's Morrisville Hatchery, yours truly delivered brook trout eggs to Dryden, Caroline, Northeast and Lansing Elementary Schools today, as well as Lansing High School. 

Students viewed the eyed eggs up close before we placed them in their new aquarium homes.  We are always amazed by the size and potential of these tiny eggs.  The kids will make regular observations of the developing embryos and newly hatched brook trout, which tend to run 3-4 weeks behind out brown trout eggs.  Thanks to Patti Jennings and her great 3rd grade enrichment students at Lansing Elementary for these pix!