Population Demographics for St Joseph, Minnesota in 2016 and 2015.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  spawn(verb) the mass of eggs deposited by fish or amphibians or molluscs. 2  engender, breed, spawn(verb) call forth. 3  spawn(verb) lay spawn. The salmon swims upstream to spawn.
The milt contains millions of sperm. Salmon gametes mixing. Fertilization occurs as the salmon eggs and milt mix. The fertilized egg then settles into the redd (just below grade so that the flow of the stream does not move the fertilized egg).hey will eat anything they can find and when they are about one inch they are called fry. Each species spends a different amount of time in the stream as a baby. Also, each stream is a little different. All baby salmon eventually migrate downstream to the ocean.