Can't draw any conclusions from that. Data is only as good as study design, sample size, statistical methods used in analysis of data. Who published the results and what journal it was published in is usually good indication of quality of work. Added to the problem are other factors that affect quail populations that need to be factored in: other predators: cats, crows, rats, foxes, raccoons, skunks,....loss of habitat,...There are plenty of squirrels, rabbits, wildfowl, turkeys,......no worries.
