During the fall reproductive season, the belly of a male brook trout becomes bright orange. The orange belly provides some camou?age and helps attract females. This trait evolved in brook trout because, compared to males with pale bellies, males with bright orange bellies are more likely to

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The bright orange belly of male brook trout during the reproductive season is a trait that likely evolved due to sexual selection, where females prefer mates with such traits, leading to a higher chance of those males fertilizing eggs and producing offspring.

During the Fall Reproductive Season, the Belly of a Male