No. Salmon die when they go up river because that is part of their natural life cycle. Salmon are actually anadromous, meaning they can be in different kinds of water at different parts of their life. For instance, they are born in fresh water then migrate to the ocean where they sexually mature for about five years then end their life in fresh water in order to reproduce. Some species only live in freshwater though. Salmon are able to return to where they are born because of olfactory memory–they smell their way back! In salmon species that live in the ocean (that of the Pacific salmon) all mature individuals are known to die within a few days or weeks of spawning. A few Atlantic salmon live to spawn again, but it is only a few percent of the total population.
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