Why Do Salmon Swim Upstream?
Last Updated Apr 14, 2020 1:55:12 AM ET
Salmon return to rivers from the ocean and swim upstream to their original hatching place to lay and fertilize their eggs. Swimming upstream is hard work, and only the strongest complete the journey and spawn the next generation of salmon.
Each species of salmon follows its own schedule of return to the birth stream for reproducing. Experts believe that an inborn sense of smell guides each species of salmon to its original hatching grounds. When the fish leave the salt water of the ocean and enter the fresh water of the stream, they stop eating. Spawning is the last thing salmon do before they die.
More From Reference
Understanding D-Day: What Is the History of the Normandy Invasion?
8 Simple Ways You Can Make Your Workplace More Inclusive for LGBTQ+ Folks
How Do Archaeologists Determine the Purpose and Meaning of Ancient Monuments?
Mythology 101: A Basic History of Zeus the Greek God
What Services Does the Clever Portal Offer Students for Distance Learning?
When Was the First Memorial Day?