Will the Lynx roam soon again in the UK ?
Wildlife Extra News - First steps taken in lynx reintroduction into the UK
Wildlife Extra News - First steps taken in lynx reintroduction into the UK
Will the Lynx roam soon again in the UK ?
Wildlife Extra News - First steps taken in lynx reintroduction into the UK
Haven't we had Lynx in the UK for over 20 years unofficially that is?
Dotted all over the place; probably not in sustainable numbers in any given location but, for instance, they are certainly present in Northumberland in the wilder areas near the border with Scotland.
Dotted all over the place; probably not in sustainable numbers in any given location but, for instance, they are certainly present in Northumberland in the wilder areas near the border with Scotland.
The fact they have made so little impact, and remain in the realm of very strong rumour, is a good indication that an official reintroduction programme will demonstrate lynx will blend into the ecosystem quite nicely.
The notion that there are feral "big" cats in the UK is hardly up there with conspiracy theories and "proper" cryptids.
Sorry, strong rumours doesn't cut it, there are strong rumours of faked moon landings, immigrant kidney thieves and Loch Ness monsters but I'm not accepting any of those either.
For lynx, Hetherington (2005) has calculated that it would require a founder population of 12-32 animals for the population to have a 95% chance of persisting 10 years after the release. Even if, for example, individual cats near Hexham and Hartlepool could meet up the statistical chances of a population resulting from that must be very small. The maximum that an individual cat might be expected to live in the wild is into the low teens, though these are the exceptions (Guggisberg, 1975). The reports have continued for several decades now, therefore the conclusion must be either: that virtually all of the reports are cases of mistaken identity; that there are continued releases; that the animals are breeding in the region, or that there is a breeding population outside of the region from which individual cats are emigrating. None of these strikes the author as very likely but one, or a combination of them, must be the case.
And to clarify - my estimate of there possibly being as many as 50 lynx living within the UK is based on scaling up a rough estimate of 5 or 6 animals *maximum* in the North-East and applying it nationwide. I do not believe there is a sustainable population anywhere in the UK, at any rate.
By the by, of these options I suspect the second - that there are continued releases - is the most likely. The figure about how large a founder population would need to be in order to be near-certain to persist is interesting on another level, of course - it means that if the reintroduction were to go ahead on a trial basis but be deemed a failure, there would be little to no chance of the population establishing itself nonetheless without further supplement.
What bothers me about this is (And I know this a ZooChatter's problem) will it be pure bred Northern lynx or will they be sending in sub-specific hybrids or another subspecies? I'd like to assume Northern as I assume these were the lynx that were once native?
Another point, will the lynx be wild-caught and trans-located or captive bred and non-imprinted?
As for Dave's observations and facts regarding current native lynx, I'm firmly in the Shorts camp of it would be possible but I don't think it's probable that there could be up to 50 roaming the UK! (However nice that would be!)
To cite the nearest comparison in terms of a taxon we know and have proof is present - but which is more or less never seen - I believe the Vincent Wildlife Trust currently estimates the population of Pine Marten in England is 120 individuals, located in Northumberland, North Yorkshire and Cumbria, with a further 60 individuals in Wales. Granted this taxon is rather smaller than a lynxbut if 120 individuals can be present but seldom seen or recorded in three counties, I think that <=50 lynx dispersed between Lands End and John O'Groats is not a fantastical prospect.
I'm presuming you'd concur that, longevity-wise and other reasons-wise, the post DWAL introduction release theory just doesn't hold water anymore?