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How do they know? I thought salmon always return to the same river, so a river no salmon come from won't get any returning, but I guess a certain percent are a
by lupusreal 2y ago
How do they know? I thought salmon always return to the same river, so a river no salmon come from won't get any returning, but I guess a certain percent are adventurous?
- ivandenysov 2y agoIf all salmon returned to the same river then there would be only one river with Salmon spawning. Maybe they do have perfect memory, but a certain percentage of them get carried to other rivers by birds of prey who want to have Salmon in THEIR river
- InDubioProRubio 2y agoActually- its birds like ducks eating the eggs and a percentage of eggs surviving the ingestion and being shit out into a new river
- optimalsolver 2y agoThe elegant beauty of Nature.
- AlotOfReading 2y agoThe river wasn't entirely inaccessible to salmon, the dams just prevented access to the upper lakes and river segments.
- shkkmo 2y agoMost salmon do, but a small percentage always stray. If you think about it, it is kinda an obviously necessary behavior given that many current salmon habitats were not present during the last ice age.