We analyze a logistic two-sex model with mate-finding Allee effects assuming distinct
sex-related parameters. We compute the threshold of the Allee-effect strength that
separates population extinction from persistence and prove that a bistability regimen
appears whereby the total population either goes extinct or stabilizes at a positive
level depending on the initial demographic conditions. We show that this effect is the
only possible outcome as far as the population limiting behavior is concerned. In
addition, we compute the optimal female-sex probability at birth that maximizes this
threshold.
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