Nuptial gift in crickets: duormous are maleUnderstand the examples ofspecies with sex-role reversal.Sex role reversalIn some empid fies, theoperational sex ratio is heavilyfemale biased, because mostmales are off hunting for insectprey that is used as a nuptialgift When a male enters theswarm with a nuptial gift. he mayfind females advertisingthemselves with unusually largepatterned wings, legs orabdomen.Is this always the case?mle diaclansSex role reversalSex role reversalPipefish males have a brood pouch in whichfemales lay their eggs. Provide nutnients and oxygenfor a clutch of eggs for several weeks (male"pregnancy") Females compete formales. Maleshow more interest in feeding thanin mating.transfers to the female anspermatophore (-24% of the male's body mass).Males can only afford to mate orice.qpacs Scanned with CamScanner

Females strive more strongly than males for availability to mates, resulting in sex-role reversal.

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Understand the examples of species with sex-role reversal.

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter41: Animal Reproducbon

Section: Chapter Questions

Problem 3DAA

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Question

Nuptial gift in crickets: duormous are male
Understand the examples of
species with sex-role reversal.
Sex role reversal
In some empid fies, the
operational sex ratio is heavily
female biased, because most
males are off hunting for insect
prey that is used as a nuptial
gift When a male enters the
swarm with a nuptial gift. he may
find females advertising
themselves with unusually large
patterned wings, legs or
abdomen.
Is this always the case?
m
le diaclans
Sex role reversal
Sex role reversal
Pipefish males have a brood pouch in which
females lay their eggs. Provide nutnients and oxygen
for a clutch of eggs for several weeks (male
"pregnancy") Females compete formales. Males
how more interest in feeding thanin mating.
transfers to the female an
spermatophore (-24% of the male's body mass).
Males can only afford to mate orice.
qpa
cs Scanned with CamScanner

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