Which mechanism allows salmon to navigate upstream when visibility is poor?

💡 Explanation

Salmon navigate via olfactory imprinting, a process where they memorize the unique chemical composition of their birth river; because juvenile salmon imprint chemicals in natal streams, therefore, they return due to recognition, rather than magnetic or celestial cues.

• Which effect primarily causes reduced avian efficiency during high-altitude migration?
• Which outcome ensures plant survival when soil nitrogen is limited?
• Which outcome occurs when mammals attempt hyperthermia recovery through peripheral vasodilation in high humidity?
• Which consequence results when cuttlefish discontinue chromatic communication dances?
• Which outcome results when a fish's lamellae in the gills collapse due to sediment exposure?
• Which outcome occurs when a mammal experiences sustained vasodilation to counteract hyperthermia?