2016-2017 School Year

Our salmon eggs were delivered from the Kensington Hatchery on Friday, January 6, 2017. The third grade and 6th grade classroom each received about 200 eggs at a cumulative development index of 44%. The eggs came later to us this year than in previous years. We have the chiller units set on 3 degrees Celsius to keep the growth rate very slow. Our target release date is late April or early May. 

Salmon Release May 5, 2017

posted Jun 3, 2017, 4:48 AM by Deborah Costolnick   [ updated Jun 3, 2017, 4:57 AM ]

The 3rd and 6th grade classes released approximately 350 salmon to the west branch of the Farmington River at Peoples State Forest. The cumulative developmental index on the day of the release was about 93%, as originally projected based on temperature control of the tank.  Unfortunately, the photos taken with my cell phone were lost! The release went well despite the rain and colder temperatures. During the week prior to the release, the temperature of each tank was increased one degree celsius to more closely match the temperature of the river. At the time of the release, the water in the tank was 8 degrees celsius and the river water was about 10-11 degrees celsius. The fry swam quickly and found cover when we put them in the river. Good luck to them! 


April 11, 2017

posted Apr 23, 2017, 4:17 AM by Deborah Costolnick   [ updated Apr 23, 2017, 4:24 AM ]

The salmon have been growing rapidly and are mostly very healthy! We are on track to release them in early May. The cumulative development index on April 11 was about 82%. Here are the latest photos:

 
 
 
 Curly spine  but still thriving! 

February 20, 2017

posted Feb 20, 2017, 4:55 PM by Deborah Costolnick

Today our cumulative developmental index is 62%. Most of our eggs have hatched and the alevin look healthy. We have only lost about 8 eggs so far. 

 
 
 

January 28, 2017 - First Egg Loss in 6th Grade Tank

posted Jan 28, 2017, 12:41 PM by Deborah Costolnick

The first sign of a fungus in the tank appeared today with the loss of one egg. Fungus occurs in nature and is a common reason for egg loss. Hopefully, we will not have too much more growth in our tank. Suspicious eggs must be removed promptly to avoid rapid spread of fungal growth to healthy eggs. 

 
 
https://sites.google.com/site/hartlandsalmoninschools/2016-2017-school-year/_draft_post-1/IMG_2924.JPG

January 25, 2017 - First Alevin Hatches!

posted Jan 25, 2017, 3:58 PM by Deborah Costolnick   [ updated Jan 25, 2017, 5:43 PM ]

Our first egg hatched today in the 6th grade classroom. The cumulative developmental index is 52% today. The images and video below shows the alevin in the process of shedding the protective membrane. 

 
 

First Alevin Hatching!


 

January 22, 2017

posted Jan 22, 2017, 11:25 AM by Deborah Costolnick

The cumulative development index today is about 50%. The third grade classroom has lost a few eggs and had a few alevin hatch! The sixth grade classroom has not had any losses and has not seen any alevin hatch yet. The images below are from the 6th grade tank. 

 Several eyed eggs in the net basket for observation 
 Eyed egg - yolk sac visible through membrane    
 Eyed eggs in bottom of tank. No alevin yet!

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