But, the whole system of native waterfrogs can be threatened if the interbreeding success rate is skewed towards P. ridibundus, or when the invasive frog has a more productive population or a larger habitat size than native frogs.
The suburbs used to be blessed with a young, productive population.
In such scenarios, a more productive population of P. ridibundus threatens both native frogs irrespective of the geographical origin or the capacity to induce hybridogenesis.
Conversely, for a given offspring production by the focal, the advantage of competing within a population of individuals that are on average less fecund is expected to be greater than the disadvantage of competing in a more productive population.
His argument is fairly simple: we could almost certainly do without all of these jobs, but "the ruling class has figured out that a happy and productive population with free time on their hands is a mortal danger".
However, it is clear that immunization of our children is a critical pre-condition to ending poverty and establishing a healthy and productive population".
And national health care will not only create a healthier, more productive population, but will also enable employee mobility that further enhances economic productivity.
But the nation will benefit from a healthier, more productive population that, in the long run, may have less need for costly medical services.
To make a healthy and productive population, and to release their undoubted and much needed talent and endeavor, we need physical access.
