WLACE River Ecosystem

WLACE River Ecosystem

Monday, December 13, 2010

Stage # 2: Alevins

The alevins are mixed in with the eggs that have not hatched. 

Stage # 2: Salmon Alevins

The alevins hatch from within the salmon eggs.  As the salmon grow and develop space becomes very limited.  Wiggling motion within the egg causes the protective layer to rip and the alevin pushes out.  Alevin will continue to grow and develop within the gravel.  Attached to their stomach is a yolk sac.  The yolk sac will provide the nutrients for 24-30 days.  During this time period the alevins will continue to grow and develop.    

Friday, December 3, 2010

Motherly Instincts Update

Thursday 12-2-10
In the tank I see that the water is very clean and all the tests are right where they should be. 
·       The temperature is 44° F
·       The ph balance is 7.6 , where it should be
·       Nitrate is 0 ppm ,good
·       Nitrite is 0 ppm , good
·       Ammonia is 0.25 ppm , good
·       The dissolved oxygen is 4 ppm , good
·       Phosphate is 2 ppm good
·       And the high range test is perfect too with a 8.2
WLACE Alyssa Hanusosky
The eggs looked normal except for a few that had white gooey stuff forming around the egg. The white gooey stuff could  illustrate infection within the egg.

Friday, November 19, 2010

Salmon Update!

November 19, 2010

The salmon eggs are have continued to develop.  The eggs are starting to show shadows of the developing embryo.  Veins and blood vessels are visible on many of the eggs.  I believe we have one fatality among the eggs.  The key characteristic for determining dead eggs is the color.  Pale cream/white is commonly associated with death.  The dead egg can be seen in today's picture.  This is WLACE's first salmon fatality!

Updated River Ecosystem
Updated by: WLACE student Drew Sanger 

Friday, November 12, 2010

The Egg

When adult salmon enter the river to spawn, each female salmon can lay 2,000 to 2,500 eggs.  The eggs are pink/orange in color.  The average size ranges from 6 to 9 mm in diameter.  Salmon eggs consist of a  transparent membrane that protects the egg from predators or other disturbances while in the river.  Salmon eggs are very sensitive and one in 10 eggs will survive in the wild.

New Home

Greeting from WLACE,

I am excited to report that our 200 Chinook/King Salmon eggs have arrived! 
Stay tuned for weekly blogs and pictures from our WLACE Adult Ed. student's!