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DOES THE TRADE‐OFF BETWEEN GROWTH AND REPRODUCTION SELECT FOR FEMALE‐BIASED SEXUAL ALLOCATION IN COSEXUAL PLANTS?
Author(s) -
Sakai Satoki,
Harada Yasushi
Publication year - 1998
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1998.tb01846.x
Subject(s) - biology , reproduction , resource allocation , sexual reproduction , sex allocation , time allocation , optimal allocation , trade off , economics , ecology , mathematics , mathematical optimization , pregnancy , genetics , management , offspring , market economy
We analyzed sexual allocation in cosexual plants while taking the trade‐off between growth and reproduction into consideration and showed that this trade‐off does not select for female‐biased sexual allocation. There are two problems in sexual allocation: optimizing the amount of resources allocated to reproduction in a growing season and equalizing the resources allocated to the male and the female functions. If these two are possible at the same time, equal resource allocation to the male and the female functions is the evolutionarily stable strategy (ESS; given that the fitness gains through the male and the female functions are proportional to the amount of the resources allocated to these functions). Biased sexual allocation only occurs when constraints make it impossible to simultaneously optimize allocation to reproduction and allocation to male and female functions. However, even if female‐biased sexual allocation occurs due to the addition of other constraints, the trade‐off between growth and reproduction itself is not an important factor that selects for female‐biased sexual allocation.