To preserve populations of endangered bee species, sound knowledge of their maximum foraging distance between nest and host plants is crucial.
The marked uniformity is often the result of two forces: customer demand for pan-sized portions and fishing regulations that limit harvests to older fish to preserve populations.
Although we used land acquisition as our mechanism to preserve populations, our models can readily incorporate ongoing management costs [15] and other conservation strategies such as easements or active management [10].
Our model simultaneously describes individual cells as well as cell populations (or tumors), thus preserving population heterogeneity.
Observable levels of private mutations are likely to be deceptively low, especially in vivo, as two mitigating processes occur: viruses that accrue substantial mutational burdens are defective and are lost from the population, and recombination can act to preserve the population for at least a time by recombining non-lethally mutated regions of viral genomes.
Under this assumption, hosts in our model regain protection by exposure to one of the dominant strains circulating in the host population at high frequencies, and do so at a sufficiently high rate to preserve strain population structure except at extremely low transmission intensity.
To compare inequality between populations with different mean health, one must decide what distribution of health changes would preserve a population's level of inequality.
Rural America has struggled in recent years to preserve its population, political power and way of life.
He said the cost of existing agricultural land meant young farmers could not afford to buy into the area, and the town needed to do something to preserve its population.
