21.   The entire seal population in the North Sea was threatened, but has since recovered.

22.   The virus could again have serious implications for the West-European seal population, but officials said it had not yet reached an epidemic scale.

23.   But opponents of the hunt argue that the seal population is not strong enough to withstand the hunt.

24.   Its entrance is only a short distance from the islands of Skokholm and Skomer which are famous for their sea bird colonies and grey seal populations.