A lake is polluted by waste from a planet located on its shore. Ecologists determine that when the level of [pollutant is $\displaystyle {x}$ parts per million (ppm), there will be $\displaystyle {F}$ fish of a certain species in the lake where, 

$\displaystyle {F}=\frac{{30000}}{{{8}+\sqrt{{{x}}}}}$

If there are $\displaystyle {2706}$ fish left in the lake, and the pollution is increasing at th rate of $\displaystyle {1.2}$ ppm/year, then the rate at which the fish population of this lake is decreasing by fish per year, rounded up to the next whole fish.