Photos

WHY ARE SOME FEMALES ELABORATELY ORNAMENTED AND OTHERS NOT?

Stickleback (Gasterosteus aculeatus)

Left pelvic spine of a (upper) highly carotenoids-based ornemented and a (lower) drab female  from Lake Nedre Vollvatn.

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Arctic charr (Salvelinus alpinus)

Ventral view of a carotenoids-based ornamented female  and a drab female