2007-11-10 10:55:36 · 6 answers · asked by chucklezd 2 in Sports ➔ Outdoor Recreation ➔ Fishing
It eliminates the weakest of them (they die before they get their or just don't make it) so that only the most powerful and healthy get to reproduce.
2007-11-10 11:07:23 · answer #1 · answered by Anonymous · 0⤊ 0⤋
In each creek, which the salmon is born, a trace element that is specific to that creek only ( like a smell) is embedded into the salmon. They move from the fresh water down to the ocean for several years where they feed and grow. At a certain time in their life, as maturity occurs, they longinly seek to return to the orginal of thier birth to reproduce. After they reproduce, they die and this is the beginning of a whole new cycle of life which starts over again.
2007-11-10 23:31:38 · answer #2 · answered by garryh41 3 · 0⤊ 0⤋
its encoded in their dna to mate to increase the population.almost every animal is like that look at deer for instance the are just getting fired up right the rut is almost settling in the being fighting for the does to mate which will increase the population... same with salmon, they aren't spawning right now.
2007-11-10 19:43:32 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Because they are coming in from the ocean and the bus service going upstream is really lousy.
2007-11-11 02:41:16 · answer #4 · answered by Anonymous · 1⤊ 1⤋
They are going to the same place they were born.
2007-11-10 18:58:38 · answer #5 · answered by Veritas 7 · 0⤊ 0⤋
Because they can't walk.
2007-11-10 23:42:05 · answer #6 · answered by shipwreck 7 · 0⤊ 0⤋