Why Lonesome George should get stuffed (or pickled)

Embalming him will be worth the effort for the insights we get into his species.

When I heard about the demise of the last living Pinta Island Giant Tortoise, Lonesome George, my first thoughts went to his preservation. Apparently he is to be ‘embalmed’ for posterity, which I heartily approve of, depending on the methods used. Ideally, tissue samples should be collected and archived in tissue banks such as the Frozen Zoo prior to embalming, since formaldehyde breaks down DNA. The preserved specimen should then be stored in a properly curated collection to ensure appropriate long term care (pdf).

But why go to all this effort? Besides the cultural importance of preserving this iconic animal, George’s anatomy and genetics can tell us a lot. He was the last of a subspecies that was part of a ‘species complex’ – a group of around fifteen closely related, yet distinct, types of Giant Galapagos Tortoise.
This group of tortoises has been important for scientists interested in evolution and biogeography, including a young Charles Darwin, who observed (and indeed ate) them in 1835 when the Beagle visited the Galapagos Archipelago. The tortoises varied in shape to better suit the vegetation on the different islands that they inhabited, something that contributed strongly to Darwin’s ideas on evolution.

Since then our understanding of speciation has been greatly improved by studies carried out on these long-lived giants. Genetics and geology have combined to give us a picture of the changing shape of the volcanic islands that make up the Galapagos and the corresponding changes in the Giant Tortoise genome (pdf) and anatomy as they responded to changing habitats.

Human impact has also been substantial, as the Tortoises have historically provided a convenient resource for sailors. Crews would gather hundreds of the animals for food and ballast, sometimes dumping them on different islands, where they hybridised. Tortoises were even used as a source of oil for lamps, to the point where an oil refinery was established on the island of Floreana to process them.

In his 1835 diary Darwin said: “…the numbers [of Giant Tortoise] have been much reduced; not many years since, the Ship's company of a Frigate brought down to the Beach in one day more than 200. .... Mr Lawson thinks there is yet left sufficient for 20 years…”. Mr. Lawson’s estimate turned out to be a little optimistic and the Floreana Giant Tortoise was probably extinct by 1850.

With tortoises being so abundant and so easy to collect, it is unsurprising that many eventually found their way into museum collections. While this may have been bad for the populations at the time, it may have a significant benefit for the future of the species complex, as studies carried out on museum material can help inform conservation activities.

In the words of a key researcher in the field, Dr Michael Russello of The University of British Columbia: “…much of our population genetic work associated with Lonesome George, specifically, and Chelonoidis abingdoni, generally, would not have been possible without specimens accessioned within natural history museum collections. The availability of vouchered specimens allowed us to reconstruct the genetic composition of the now extinct Giant Galapagos Tortoise once endemic to Pinta Island. Without access to a population-level sample afforded by museum collections, our group would not have been able to detect genetic signatures of extinct C. abingdoni and C. elephantopus on the neighbouring island of Isabela, work that has directly led to multiple expeditions and direct conservation action. An unfortunate aspect of the biodiversity crisis is that museum collections will likely become increasingly important in maintaining a source for study specimens and a repository for genetic resources of imperilled and extinct taxa.”

It is for these reasons that it is worth the effort of preserving Lonesome George and other species. Museum collections are not just about understanding the past, they are about protecting the future.

Paolo Viscardi is a natural history curator at the Horniman Museum in Southeast London

 

Lonesome George, the last known individual of the Pinta Island Tortoise. Photograph: Getty Images

Paolo Viscardi is a natural history curator at the Horniman Museum in Southeast London.

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I was wrong about Help to Buy - but I'm still glad it's gone

As a mortgage journalist in 2013, I was deeply sceptical of the guarantee scheme. 

If you just read the headlines about Help to Buy, you could be under the impression that Theresa May has just axed an important scheme for first-time buyers. If you're on the left, you might conclude that she is on a mission to make life worse for ordinary working people. If you just enjoy blue-on-blue action, it's a swipe at the Chancellor she sacked, George Osborne.

Except it's none of those things. Help to Buy mortgage guarantee scheme is a policy that actually worked pretty well - despite the concerns of financial journalists including me - and has served its purpose.

When Osborne first announced Help to Buy in 2013, it was controversial. Mortgage journalists, such as I was at the time, were still mopping up news from the financial crisis. We were still writing up reports about the toxic loan books that had brought the banks crashing down. The idea of the Government promising to bail out mortgage borrowers seemed the height of recklessness.

But the Government always intended Help to Buy mortgage guarantee to act as a stimulus, not a long-term solution. From the beginning, it had an end date - 31 December 2016. The idea was to encourage big banks to start lending again.

So far, the record of Help to Buy has been pretty good. A first-time buyer in 2013 with a 5 per cent deposit had 56 mortgage products to choose from - not much when you consider some of those products would have been ridiculously expensive or would come with many strings attached. By 2016, according to Moneyfacts, first-time buyers had 271 products to choose from, nearly a five-fold increase

Over the same period, financial regulators have introduced much tougher mortgage affordability rules. First-time buyers can be expected to be interrogated about their income, their little luxuries and how they would cope if interest rates rose (contrary to our expectations in 2013, the Bank of England base rate has actually fallen). 

A criticism that still rings true, however, is that the mortgage guarantee scheme only helps boost demand for properties, while doing nothing about the lack of housing supply. Unlike its sister scheme, the Help to Buy equity loan scheme, there is no incentive for property companies to build more homes. According to FullFact, there were just 112,000 homes being built in England and Wales in 2010. By 2015, that had increased, but only to a mere 149,000.

This lack of supply helps to prop up house prices - one of the factors making it so difficult to get on the housing ladder in the first place. In July, the average house price in England was £233,000. This means a first-time buyer with a 5 per cent deposit of £11,650 would still need to be earning nearly £50,000 to meet most mortgage affordability criteria. In other words, the Help to Buy mortgage guarantee is targeted squarely at the middle class.

The Government plans to maintain the Help to Buy equity loan scheme, which is restricted to new builds, and the Help to Buy ISA, which rewards savers at a time of low interest rates. As for Help to Buy mortgage guarantee, the scheme may be dead, but so long as high street banks are offering 95 per cent mortgages, its effects are still with us.