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| European badger (Meles meles). Source: theguardian |
Source: From Dusk ´til Dawn
Badger culls
increase bovine TB because the surviving, infected, badgers often venture
further from their ranges.
Members of the
public who may know little about farming – or wildlife – could be forgiven for
thinking that farmers' lives are being ruined by badgers.
It is a
message being peddled by the farming press, by some – but not all – farmers, and
even by the BBC's Countryfile programme. They say that thousands of cattle are
being slaughtered every year (30,000 in 2010) because of bovine tuberculosis
(bTB) – an airborne respiratory disease – at enormous cost to farmers and the
taxpayer: £100m last year. This much is true. They also say that bTB is being
passed to cattle by badgers. This I dispute, based on evidence from those who
know better than me – scientists.
Those of us
who want to protect badgers from such bad press are forced on to the defensive.
Particularly now, as the government has said it is "minded" to authorise a
massive cull of badgers in an effort to control bTB.
It wasn't
always like this. Bovine TB was almost eradicated by 1970, when there were only
about 1,000 cases. Eleven years of localised badger culling failed to reduce the
toll further. But the end of annual cattle testing in the mid-80s, and the
devastating effects of BSE and foot-and-mouth disease, when testing was
abandoned altogether, meant that many farms lost thousands of animals, and
afterward there was a rush to restock. Regulations were relaxed, so cattle were
bought and sold and – crucially – moved all over the country. Bovine
tuberculosis was back. These relaxations of the movement and testing regimes –
not badgers – were to blame.
So, to the
question of whether badgers are responsible for increasing infection rates in
cattle. If they are, how have cattle remained free of bTB in Scotland, where no
badgers have been killed? Why do they have it in the Isle of Man, where there
are no badgers? And why are bTB rates twice as high in Ireland, where so many
badgers have been killed that they are extinct in many areas?
Could it be
possible that cattle are infecting badgers? After all, cattle far outnumber
badgers – 9 million cattle to, at most, a quarter of a million
badgers.
George Pearce,
a wildlife consultant, used to be a farmer. In his new book, Badger Behaviour,
Conservation and Rehabilitation: 70 Years of Getting to Know Badgers, he
explains how his family's farm, which always had badger setts on it, managed to
remain free of bTB from 1950 to 2008, when the herd was dispersed.
Since the
1930s, there have been four important measures used to combat bTB: very strict
movement controls, thorough cleansing of livestock buildings, good ventilation
and double fencing on all boundaries to prevent cattle in adjoining fields from
exchanging saliva.
Pearce says
that if we want to solve this crisis, we should be talking about cattle, not
badgers.
Aside from
these measures, he suggests that we look at the bloodlines of our cattle. All
bulls, whether used naturally or artificially, should have blood tests to assess
their susceptibility to bTB. The reduced gene pool of bulls over the past 60
years could be contributing to the problem.
Cattle that
were largely bTB-free in the 60s and 70s, he adds – mostly British breeds – have
gradually been replaced by continental breeds. Are they less
resistant?
What's more,
cattle are bred much more intensively now, and bTB is known to be a
stress-related disease.
What about
dietary deficiencies? Dick Roper in Gloucestershire was anxious to find out why
one of his farms was hit by bTB when his others were not. On the affected farm,
the cattle were fed on maize, which badgers also love. But maize lacks selenium,
a mineral that – in humans and livestock – is necessary to maintain a strong
immune system. So, Roper introduced selenium mineral licks for his cattle, and
for the badgers on his land – to the amusement of his neighbours – and cured his
problem, despite all the farms around him becoming infected. Are cattle getting
bTB because their immune system is compromised?
In the past
two years, improved cattle testing, biosecurity and movement controls in England
have led to a 15% reduction in the rates of bTB infection. In Wales, during the
same period, the number of cattle slaughtered because of bTB has fallen by 36%,
and by 45% in Dyfed. The Welsh Assembly Government had proposed a cull, before
being forced to drop the plan.
And this,
without a single badger being culled – despite the fact that a few rogue farmers
have been swapping the ID tags of cattle so that valuable animals with bTB were,
illegally, kept on farms, while healthy, but less valuable, ones were sent to
slaughter in their place.
David
Williams, the Badger Trust's chairman, said in April:
"The effect of these offences is apparent: the guilty parties are harbouring and spreading disease by keeping infected cattle on farms. The cattle-based measures now in place depend absolutely on effective movement controls, honest and accurate record keeping and discipline. They have been producing heartening results without killing a single badger, particularly in Wales. However, if badger culling had been introduced last year, these improvements would have been claimed as 'proof' that culling had been necessary."
Meanwhile, the
statistics about the number of cattle slaughtered every year because of bTB, and
the amount this costs, have been very visible in the media, but no one mentions
the other causes of premature slaughter.
In 2009,
120,000 cattle were slaughtered because they were infertile. In 2008, 75,000
were slaughtered because they were "not in calf"; 50,000 because of mastitis;
25,000 because of lameness; and 7,000 because they were "low yield". Not to
mention the male dairy calves that are killed at birth because they are
unprofitable. Compare these figures with the 30,000 with bTB that are
slaughtered.
No one
mentions these because they are not caused by wildlife. Several factors,
including bad luck and bad husbandry, are at play. Farmers receive no
compensation for these animals. They accept these losses as an unfortunate part
of their livelihood – there is no one to blame.
Last year, the
government announced a public consultation on whether we should have a cull. It
ended in December, but the results had not been made public. Why not? A request
for the information under the Freedom of Information Act was turned down because
the Department for Environment, Food and Rural Affairs said releasing the
information "would affect their policy". Isn't that what a consultation is meant
to do? They have, however, now included the results as part of another
consultation, which closes on 20 September. Those figures show that, of those
who responded, 69% would not want to cull and 31% were in favour of culling but
alongside vaccination. Not exactly a resounding endorsement of the government's
proposals.
In other
polls, too, the public have made their opposition clear: 97% against in a 2007
poll for the Labour government; 68%, both rural and urban, against in a recent
BBC poll; 90.9% against in a Guardian poll in July. Even a recent poll by
Countryfile, which largely has a farming audience, polled more than 60% against
a cull.
Would badger
culling help? The answer is no. And to support this conclusion, we need only
look back at the evidence of the Krebs trial, a massive pilot cull of badgers
over 10 years between 1997 and 2007, overseen by the Independent Scientific
Group (ISG). It is a well-worn argument, but it bears repeating: the trial
showed that bTB in the culling area was reduced only marginally. Outside the
culling area, it actually rose, a result of what is called perturbation, where
badgers who have survived a cull spread out to escape danger. This behaviour
does not occur in any other species. The conclusion of this massive trial was
that "culling can make no meaningful contribution to the reduction of
bTB".
In the weeks
leading up to the government's latest announcement, seven former members of the
ISG wrote a letter to the Times opposing a proposed cull. They included Lord
Krebs, who designed the 10-year trial and is now chairman of the House of Lords
science and technology select committee, Professor John Bourne, the ISG's
chairman, and Dr Chris Cheeseman, the principal scientist for many years at
Defra's Woodchester Park study area in Gloucestershire, where farmers themselves
were involved in research into badgers, cattle and bTB. They said there was "no
empirical data on the cost or effectiveness (or indeed humaneness or safety) of
controlling badgers by shooting, which has been illegal for decades".
In early July,
Lord Krebs said: "The trial evidence should be interpreted as an argument
against culling. You cull intensively for at least four years, you will have a
net benefit of reducing TB in cattle of 12% to 16%. So you leave 85% of the
problem still there."
It seems their
arguments have fallen on deaf ears. Make no mistake, this is an argument the
government does not want to hear.
If bTB is in
decline, why is the government not saying this in public? This lack of openness
appears to vindicate those who believe that a decision to cull is a matter of
political expediency, to secure the farmers' vote, and is not based on the
available evidence.
But those of
us who have an interest in all animals, whether wild or farmed, are tired of
badgers being the scapegoat.
Source: The Guardian via From Dusk ´til Dawn
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