Evo­lu­tion­ar­ily sta­ble strat­egy

BBC Wildlife Magazine - - Our World -

The con­cept of evo­lu­tion­ar­ily sta­ble strate­gies emerged from the math­e­mat­i­cal dis­ci­pline known as game the­ory. A strat­egy is evo­lu­tion­ar­ily sta­ble if it can­not be bet­tered – as long as most of the pop­u­la­tion adopts it. This helps ex­plain, for ex­am­ple, the evo­lu­tion of co­op­er­a­tion; how an­i­mals make de­ci­sions about when they should fight or flee; and why most species pro­duce equal num­bers of males and fe­males, even though a mi­nor­ity of males in many species (such as wal­rus) fa­ther the ma­jor­ity of off­spring. SB

Male wal­rus: un­lucky in love (mostly)

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