Background. Male fiddler crabs have a large claw that is used in mating displays but not for getting food. You manipulat

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Background. Male fiddler crabs have a large claw that is used in
mating displays but not for getting food. You manipulate the
apparent size of claws by attaching 3D-printed
plastic claws to juvenile males, and find females preferentially
mate with males only when you give them larger claws than any
you find in the natural population. When you
fertilize eggs with the sperm of adult males, you find no
relationship between the number of surviving offspring, or the
health of offspring, and the size of the father's
claw.
Question: Explain the evolution of males claw size and female
preference, given your experiments showing males with larger
claws do not produce the healthiest offspring.