The concept may not be,but it's application may be depending upon certain factors.
Recently, the question of additive versus compensatory mortality for black ducks has been revisited. With larger data sets and improved statistical models for band recoveries, later analysis suggested more instances of additivity (Nichols 1993). Between the periods 1950-1966 and 1967-1982, mean survival rates of black ducks increased consistently with the model for total additivity of hunting mortality (C. M. Francis, Long Point Bird Observatory, Port Rowan, Ontario, Canada, unpublished manuscript). Between the periods 1967-1982 and 1983-1995, hunting mortality was additive for immature male black ducks, indicating that the long-term decline of the black duck population was related to excessive harvest.
Bookmarks