Ft; FT
Fcrash (the fishing mortality rate corresponding to an equilibrium spawner-per-recruit (SPR) equal to the inverse of the survival ratio at the origin of the stock-recruitment relationship. Used as a biological reference point. A stock exploited indefinitely at Ft is expected to collapse sooner or later due to recruitment failure, hence the term Fcrash)

Dictionary of ichthyology. 2009.

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