The primary sex ratio under environmental sex determination.
The ESS primary sex ratio (male/female) under environmental sex determination (ESD) is shown to be equal to the ratio of the average fertility of a female to the average fertility of a male. Thus, depending upon how male and female fertility change over the environmental variable causing ESD, the primary sex ratio may be either male or female biased, or neither. The primary sex ratio thus contains information as to how male and female fertilities change with the environment.
Charnov
E L
EL
Department of Biology, University of Utah, Salt Lake City 84112.
Bull
J J
JJ
D000818:Animals; D005075:Biological Evolution; D004777:Environment; D005260:Female; D005298:Fertility / Q000502:physiology; D008297:Male; D008954:Models, Biological; D012732:Sex Determination Analysis; D012744:Sex Ratio