Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn....
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![Page 1: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/1.jpg)
Kokanee Salmon Kokanee Salmon
from Egg to Adultfrom Egg to Adult
![Page 2: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/2.jpg)
When salmon are three to four years old they are ready to spawn.
•What does the word “spawn” mean?
to swim upstreamto lay eggs to jump high
![Page 3: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/3.jpg)
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Salmon return to the place where they hatched.
• The trip is difficult because the salmon must swim against the current and they often have to jump over falls and log jams.
• How do salmon find where they hatched? They use their sense
of smell. They are really smart. They have a leader fish.
Salmon return to the place where they hatched.
• The trip is difficult because the salmon must swim against the current and they often have to jump over falls and log jams.
• How do salmon find where they hatched? They use their sense
of smell. They are really smart. They have a leader fish.
![Page 5: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/5.jpg)
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When the salmon are ready to spawn their bodies turn bright red and their heads stay green.
•The males grow a hooked snout, a humped back, and sharp teeth.
•What are the teeth used for?
Eating Smiling Defense against other male salmon
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The female salmon builds a special spot for her eggs.
• She uses her strong tail to dig down into the
gravel.
• She will lay her eggs in several spots in the same area and then cover them up again with gravel.
• The salmon’s spot to lay eggs is called a …
nest
redd
bed
![Page 9: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/9.jpg)
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A male salmon has an important job as well.
• A female chooses the male fish and he battles with the other male fish to be the father.
• The eggs must be fertilized by the male salmon after they have been laid by the female.
• What does the male use to fertilize the eggs?
oxygen
scales
milt
![Page 11: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/11.jpg)
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The eggs hatch in late March or early April.
• The hatchlings are called an “alevin”.
What do the alevins need to stay alive?
plankton
worms
their yolk sac
![Page 13: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/13.jpg)
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Out of 100 eggs, only five to ten will survive to the next stage in the life cycle.
• After one to two months the yolk sac has been used up.
• What is this stage called?fryadultcub
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The fry come out at night and start their migration to Okanagan Lake.
• The fry have to keep close to the stream bank to avoid predators.
• The predators are…dolphins, whales, and crabducks, big fish, and birdssnakes, snails, and spiders
![Page 17: Kokanee Salmon from Egg to Adult When salmon are three to four years old they are ready to spawn. What does the word “spawn” mean? to swim upstream to.](https://reader035.fdocuments.us/reader035/viewer/2022070307/551acc83550346b2288b5993/html5/thumbnails/17.jpg)
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These fish mature over the next two (2) to five (5) years.
• When they have reached adult size, they prepare to spawn.
• What do we call the change from an egg, to an alevin, to a fry, to an adult, to a spawning adult?
salmon run
plankton
life cycle
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The word “spawn” means…The word “spawn” means…
To lay eggs.
The female may lay up to 1600 eggs. Many of these eggs will be eaten by predators.
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Salmon find where they hatched because…Salmon find where they hatched because…
they have a very good sense of smell to lead them back.
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Male Salmon use their teeth…Male Salmon use their teeth…
to defend themselves against other males.
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The place where the female lays her eggs is called …The place where the female lays her eggs is called …
a redd.
To dig a redd, a female turns on her side and flips her tail back and forth to move the gravel.
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The male kokanee fertilizes the eggs with …The male kokanee fertilizes the eggs with …
milt.
Eggs and milt come into contact in the water as they drop to the bottom of the redd.
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The alevins need…The alevins need…
their yolk sac to stay alive.
The yolk sac is a food source the alevin uses to grow into a fry.
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This stage is called…This stage is called…
the fry stage.
Between late March and early May, the fry swim out of the gravel and straight downstream to the lake.
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The frys’ predators are…The frys’ predators are…
ducks, big fish, and birds.
Fry try to stay away from predators by hiding around logs, bolders, and plants
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The change from an egg to an adult is called…The change from an egg to an adult is called…
a life cycle.
A life cycle tells how living things grow, then die, and new livings things replace them.
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