<Dl> <Dd> d N d t = r N (1 − N K) (\ displaystyle (\ frac (dN) (dt)) = rN \ left (1 - (\ frac (N) (K)) \ right)) </Dd> </Dl> <Dd> d N d t = r N (1 − N K) (\ displaystyle (\ frac (dN) (dt)) = rN \ left (1 - (\ frac (N) (K)) \ right)) </Dd> <P> where N is the population, r is the maximum growth rate, K is the carrying capacity of the local environment, and dN / dt denotes the derivative of N with respect to time t . Thus, the equation relates the growth rate of the population N to the current population size, incorporating the effect of the two constant parameters r and K. (Note that decrease is negative growth .) The choice of the letter K came from the German Kapazitätsgrenze (capacity limit), while r came from rate . </P> <P> As the name implies, r - selected species are those that emphasize high growth rates, typically exploit less - crowded ecological niches, and produce many offspring, each of which has a relatively low probability of surviving to adulthood (i.e., high r, low K). A typical r species is the dandelion Taraxacum genus . </P>

Where does the expression breed like rabbits come from