As grayling occupy divergent habitats during development it is possible that evolutionary divergence could result.
Those who want to pull out of the European Court, such as Mr Grayling and Theresa May, now have a harder case to make.
Public debate so far has tended to focus on the high-profile, rather old "new atheists" such as AC Grayling (with his bible for atheists just out), Richard Dawkins and Christopher Hitchens, but from the numbers it appears that atheists are relatively young.
EU leaders have so far resisted attempts by Mr Cameron to make EU migrants wait four years before they can claim in-work benefits and failing to achieve this key reform would undoubtedly lead eurosceptic figures such as Mr Grayling to campaign to leave.
In addition to sockeye, other species of salmon and fish such as trout and grayling inhabit the lakes and streams.
Further, in young systems such as in the Lesjaskogsvatnet grayling system gene flow and drift may vary in strength, leading to large among year variation in strength of selection [ 34].
The growing popularity of writers such as Richard Dawkins, Christopher Hitchens and AC Grayling, who argue that religion is not just irrelevant but pernicious, is a key difference between the Britain that Benedict will find when he visits and the altogether more respectful one John Paul II experienced 28 years ago.
However, any future management such as supplementary stocking of hatchery-reared Drina River grayling should take into consideration genetic testing prior formation of brood stock, because introgression has been detected.
It did not evolve during a left-wing campaign, as Grayling might like to suggest.
However, the truth is not as self-evident as Grayling claims.
