Mrs. Renz's 4th Grade Class Redmond, Oregon

 

wpe12.jpg (49183 bytes)

 

Our Trout Egg Incubation Project

2005

 

See Our 2006 Trout Incubation Project Page

Day

Date

2003

Water 

Temp.

(degrees F)

Temperature 

Units 

Earned

(click to learn)

Running 

Total 

T.U.'s

Mortality 

of Eggs (E)

Alevin (A) 

or Fry (F)

Comments

Photos

(Click the camera to see them)
Mon 2/14 42 - 262 - The eggs came from Oak Springs Hatchery.  
Tues 2/15 49 17 279 - The 200 rainbow trout eggs were delivered today.  They are in the green egg stage.  
Wed 2/16 49 17 296      
Thurs 2/17 49 17 313      
Fri 2/18 49 17 330      
Sat 2/19 49 17 347 25 The eggs are getting eyes - eyed egg stage.  175 eggs are left.  
Sun 2/20 49 17 364      
Mon 2/21 49 17 381      
Tues 2/22 49 17 398      
Wed 2/23 49 17 415 1 The eyes are getting darker.  174 eggs are left.  
Thurs 2/24 49 17 432 2 172 eggs are left.  
Fri 2/25 49 17 449 2 170 eggs are left.  
Sat 2/26 49 17 466      
Sun 2/27 49 17 483 1 169 eggs are left.  
Mon 2/28 49 17 500 3 The eyes are becoming very visible inside the egg and the body is taking shape.  168 eggs are left.  They are in the eyed egg stage now.
Tues 3/1 49 17 517 1 Today the eggs are starting to hatch!  There are 6 that have hatched today.  165 eggs are left.
Wed 3/2 49 17 534 3    
Thurs 3/3 49 17 551 1 The water is very foamy now that the eggs are starting to hatch.  
Fri 3/4 49 17 568 3/4 of the eggs are hatched.  The water is still foamy so we get rid of the foam.  
Sat 3/5 49 17 585      
Sun 3/6 49 17 602 21 Most eggs are hatched.  There were a lot of dead eggs today.  
Mon 3/7 49 17 619 3    
Tues 3/8 49 17 636 4 The fish are now in the alevin stage.  They are getting fairly active now. 
Wed 3/9 49 17 653 4 We let the alevin go to the bottom of the tank but we are watching a few eggs.  
Thurs 3/10 49 17 670 4 125 alevin are left  
Fri 3/11 49 17 687      
Sat 3/12 49 17 704 2 Fry 123 are left  
Sun 3/13 49 17 721      
Mon 3/14 49 17 738      
Tues 3/15 49 17 755      
Wed 3/16 49 17 772 3 Fry All of the fish are in the gravel now.  
Thurs 3/17 49 17 789      
Fri 3/18 49 17 806      
Sat 3/19 49 17 823  

We are on spring vacation.

  
Sun 3/20 49 17 840    
Mon 3/21 49 17 857    
Tues 3/22 49 17 874    
Wed 3/23 49 17 891    
Thurs 3/24 49 17 908   The rest look good.  
Fri 3/25 49 17 925 7 Fry

One has a huge sac! 

One has a crooked body.

  
Sat 3/26 49 17 942  

We are on spring vacation.

  
Sun 3/27 49 17 959    
Mon 3/28 49 17 976   We came back from spring vacation and the fish were swimming all over the tank!  They are ready to be released and are very mature fish.  There are no yolk sacs left at all.  
Tues 3/29 49 17 993   The fish swim at all levels of water in the tank.
Wed 3/30 49 17 1010   RELEASE DAY!  85 fish died in all so we released 115 trout fry into Fireman's Pond. 

 

DAILY PHOTOS

Date Photos - click Photos - click to enlarge Photos - click to enlarge Photos - click to enlarge Photos - click to enlarge

2/14

wpe16.jpg (40742 bytes)

The water ph is 7.4 - perfect for raising trout eggs

 

 

      

2/15

wpe4.jpg (40328 bytes)

Green egg stage

Notice the two dead eggs (solid color)?

wpe6.jpg (61989 bytes)

View of the eggs in the holding tray.  We separated the eggs we are watching onto the other side of the tray

      
2/28

wpe1.jpg (106494 bytes)

Now they are in the eyed egg stage

wpe3.jpg (63260 bytes)

Close up view

      

3/1

Look closely - you will see a fish hatching

 
3/8

These don't look so good.

3/29 See our fish release day field trip photos!

Final results:  Out of 200 trout eggs:

        85 died  &  115 survived

 

Question:  What is a "Temperature Unit"?  

One Temperature Unit (or T.U. as we refer to it) is one degree on the Farenheit temperature scale.  The eggs earn one T.U. for every degree above freezing (32F) our water is.   For example, if the water is 40 degrees, that is 8 degrees above freezing, so the eggs have accumulated 8 T.U.s or 40 - 32 = 8.

 

Take Me to the Top Please