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Salmon employ several strategies to return to their natal streams for spawning:
Sense of Smell: Salmon have an exceptional sense of smell, allowing them to detect the specific chemical signatures of their home waters, which guide them back to their natal streams.
Environmental Cues: They use environmental cues such as water temperature, flow patterns, and the Earth’s magnetic field to navigate during their migration.
Visual Landmarks: Salmon can recognize visual landmarks along their journey, helping them orient themselves as they approach their spawning grounds.
Homing Behavior: After spending time in the ocean, salmon instinctively return to the exact stream where they were born, a behavior known as “homing.”
Swimming Strength and Endurance: Salmon are strong swimmers and can travel long distances, often overcoming obstacles like rapids and waterfalls to reach their spawning sites.