Which outcome occurs when salmon olfactory receptor neurons (ORNs) are significantly inhibited by urban runoff containing chlorine?

💡 Explanation

Reduced homing accuracy occurs due to the inhibition of olfactory receptor neurons, because olfactory imprinting establishes chemosensory maps vital for returning to natal streams. Therefore, impaired ORNs disrupt migration fidelity, rather than enhancing foraging or causing shoal changes.

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