Spawn (biology)
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- This article is about biological spawning. For other meanings of the word spawn, see Spawn (disambiguation).
Spawning is the production or depositing of large quantites of eggs in water.
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[edit] Types of egg-layers
- egg scatterers
- nest builders
- egg hangers
- mouth breeders
- egg buriers
[edit] Spawn cycle
[edit] Egg
An egg sac or collection can be called a 'redd' as in 'salmon redd' for the eggs attached to the stream bottom. Specifically, a salmon redd is the space at the bottom of a stream that a spawning salmon makes for its eggs.
[edit] Alevin
A newly-hatched fish in the larval stage, one which has not yet emerged from the nesting area. Alevins will have a noticeable yolk sac, and need this yolk sac while their digestive systems are developing. At this stage, the fish are not prepared to hunt live prey, and are completely dependent on the yolk sacs.
[edit] Fry
A fry is a recently-hatched fish, but one which has fully absorbed its yolk sac and can now hunt and consume live food. Live Bearers do have an egg sac therefore should be fed immediately in a small space.
[edit] Parr
A parr is a juvenile fish, one preparing to leave the fresh waters of its home.
[edit] Smolt
A smolt is a juvenile fish. This is the stage where Salmonid becomes physiologically adapted to saltwater and begins its trek to its salt water environment.
[edit] Grilse
''' A salmonid, especially an Atlantic salmon, which is returning to its spawning grounds after just one year in the sea.'''
[edit] See also
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