The behavioral role involved in sex-change appears to be the primary stimulation source to trigger the physiological sex-change response. 30 years of field observations have yielded a great wealth of information on sex-change in the different species. For many species, enough information exists, that given social groupings and ecological factors, one can predict which process of sex-change will occur (Ross, 1990).

A Titan Triggerfish, Balistoides viridiscens, N.GBR. Photo by C.L. Rice	Protogyny
	Protandry
	Both Ways Sex-Change
	Determining Conditions
	Which Species Do What

 

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