Flashcards in November 19 Deck (30):
Are salmon dependant on river system?
Where do pacific salmon spawn?
In river gravel upstream the eggs must have a lot oxygen available
What is the Alvien stage?
When salmon eggs develop gills but still get nutrients from the yolk
What is the fry stage?
Small fish getting markings and feed in freshwater and move into salt water
What is smolting?
Fish become silver, this is an adaptation to salt water
What are the five types of pacific salmon?
What is the largest type of pacific salmon?
Describe a Chinook salmon?
They are the largest salmon, they live in salt water for 2 years and live for 7 years. They are killer whale food
Describe sockeye salmon?
They are the most valuable salmon and are generally found in larger systems like lakes for spawning
True or false:
Bigger fish have more eggs
Describe pink salmon.
It is the smallest salmon and has a fixed 2 year cycle spawning
Describe chum salmon?
Low in fat content and occupy small and large rivers. They are the least equips to jump waterfalls
What happens to mud flaps when sea levels rise?
They get flooded
What happens to salmon populations with temperature rise?
The population decreases
Why do salmon populations shrink in warmer water?
When water is warmer the prey for salmon are less abundant and the predators are more abundant
Why does warm water deplete salmon prey?
Warmer water breeds more disease and and eddies are stronger
How much has sea surface temperature rise?
True or false:
Salmon can spawn in any river
False they always spawn in the same river and know based on touch
What is the optimal ocean temperature for sockeye salmon?
How do salmon find their spawning rivers?
What is the difference between Atlantic and pacific salmon?
Pacific spawn once, Atlantic spawn several times
Why are dead salmon good for the ecosystem?
They give nutrients to the forest and animals
What are the two types of fishing?
Troller (high seas)
Gillnetter (river mouth)
What happens to grizzly bears when salmon decreases?
How many fish do orcas need to survive per day?
Trawling vs trolling
Trawling is dragging I the floor, trolling is with a line and hook
How do dams effect salmon?
They impede spawning even though they invented a salmon ladder
If fish in fish farms get sick does the government have to tell us?
What percentage of hatchery fish are in the total catch?