How do salmon find their way back to their home?

Answer 1

It depends on the salmon. But most swim hundreds of miles from where they were born, then swim back there to spawn.

The sockeye salmon of Redfish Lake in Idaho have the longest migration of any sockeye salmon, traveling about 900 miles from Redfish Lake in central Idaho to the mouth of the Columbia River. And even after all that swimming, they're still not done! From there, they will proceed on their ocean migration up to Alaska, another couple thousand miles.

Sadly, Redfish Lake sockeye are terribly endangered. Because of overfishing and a gauntlet of dams that the salmon must bypass to get to and from the ocean, salmon returns of up to 30,000 fish in the past are now down to just a few hundred. But even that is good news, since last year, only four spawning salmon survived the journey back to the lake.

Answer 2

Salmon use a combination of their keen sense of smell, vision, and Earth's magnetic field to navigate back to their home stream. They are also thought to use their memory of past migration routes and environmental cues to guide them on their journey. Once they have returned to their home stream to spawn, they rely on their keen sense of smell to locate the exact spot where they were born.

Answer 3

The salmon are sent chemical cues that send them back to the streams of their birth. From there, they battle upstream to spawn. The concept being , it was good enough for them, it will be good enough for the offspring.

Answer 4

Because they are traveling back to where they were hatched, and then they lay their eggs there. Basically, its their life cycle, and its an instinct to be able to know exactly where you where hatched.

Answer 5

University of North Carolina at Chapel Hill think they may have the answer: The animals' brains focus on an "address" on the Earth based on the Earth's magnetic field. That magnetic field is different -- yet, unique, in the actual sense of that oft-misused word -- at every point on the globe. The above statement is true, although, in Alaska, the crossing-over to other streams allows salmon to populate new streams, such as those that emerge as a glacier retreats. The precise method salmon use to navigate has not been entirely established, though their keen sense of smellis involved. In all species of Pacific salmon, the mature individuals die within a few days or weeks of spawning, a trait known as semelparity.

Answer 6

Salmon respond in many different ways, such as they are very adaptable to their physical environment, they get used to a new habitat fast and calmly. They can also swim up waterfalls, depending what speed and height of the fall.

Answer 7

to lay their eggs but once they lay their eggs they die and the babys hatched and go to where they were born and where their mother was born and then their babys got to the place where they were born and you get the point.

Answer 8

Because salty water infests their gillousususus with poisonous noxious gas known as Tf3, this then mutates their inner membranes and thus removes their abdominal liver from their genital warts without consent from the muffin man.

Answer 9

To get their picture taken with Santa.

Answer 10

Smell Of The River