Testing the niche differentiation hypothesis in wild capuchin monkeys with polymorphic color vision

Allegra DePasquale, Shasta Webb, Rachel Williamson, Linda Fedigan & Amanda Melin
The polymorphic color vision system of most North, Central, and South American monkeys is a textbook case of balancing selection, yet the mechanism behind it is poorly understood. Previous work has established task-specific foraging advantages to different color vision phenotypes: dichromats (red-green colorblind) are more efficient foraging for invertebrates, while trichromats (color “normal” relative to humans) are more efficient foraging for “reddish” ripe fruit, suggesting that niche differentiation may underlie the maintenance of color vision...
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2 downloads reported since publication in 2021.

These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?