the Dutch philosopher convinced that saving snails is saving ourselves

Before the arrival of Westerners, in Hawaii there were more than 700 species of snails that were nowhere else. Since then, these Pacific islands have suffered all the human processes that have existed and to have occurred: from the most orthodox colonization to a totally accelerated globalization through rapid urbanization, intense militarization and tourism, a lot of tourism. The result can be summarized in just one figure: today, 60% of those snails have become extinct and those who remain are in frank decadence. Chronicle of many foretold deaths. By the early 20th century, populations were decimated, but still abundant. The boom in rats in the archipelago, the rapid changes in habitats and, above all, the arrival of the pink wolf snail (a foreign predator) have meant that the 200 or 300 species that survive do it in very isolated areas or, directly, only in ‘conversation labs‘. In one of them, in a trailer on the outskirts of Kailua and in the care of David Sischo, director of the snail extinction prevention program of the state, lived George (the last known individual of the species Achatinella apexfulva). He died there on January 1, 2019. That shocked those who were in the archipelago and, among them, Thom van Dooren. The cuckoo species trap. This professor of environmental humanities at the University of Sydney was dedicated to the study of everything that birds could teach us, he realized George’s trick. The same trap as Sudan or what other animals. He realized that “There is value in saving charismatic speciesamong other things because they are very useful for raising awareness among the population and raising funds. But, as recently explained in an interview“we cannot forget that mass extinction also and above all affects invertebrates, which constitute 99% of animal life and are essential for pollination, soil fertilization or the nutrient cycle.” What we can learn from snails. For van Dooren, what the snails are “slowly and gently” teaching us is to think in the long term, to use the forces of others and to understand that if we do not think about the systemic (the preservation of habitats), we will have to fight very difficult battles one by one (apply “violent care” to species to avoid their extinction) But, above all, it gives us three very specific ideas: Being late is a problem: if we act when the problem is already “stopped”, everything is more difficult. If we have to ‘triar’, we have already arrived late: When we put ourselves in “emergency mode” we have to prioritize what can be saved over other considerations because we have limited time and resources. And intensive interventions do not fix the cause: we can rescue, replace, conserve… but if we do not change the underlying pressures we are only postponing the end. Snails can teach us precisely that: that at the end of the day, the important thing is to be clear about what we want and value. From there, it’s time to act accordingly. If not, we are condemned to live in our particular ‘Noah’s ark’. Image | Marina Grynykha | BBVA In Xataka | They identify the smallest species of land snail in the world: it is around 0.5 mm high and its discoverers needed brushes and a microscope

A simple gene can send a divine punishment to the snails: turn them into “left -handed”

It is estimated that Something more than 10% of the world population is left. Today, this does not usually involve greater inconveniences, but there are animals that have a more problematic asymmetry: snails. Left -handed snails. Most snails share the direction in which their snail draws its spiral characteristic that revolves in the direction of the clock needles. But there is a very small population of snails whose shells develop in reverse. The reason It seems to be In a small genetic variation. The snails that develop their shell symmetrically to the rest are usually called them as “left -handed snails”, but if we had to look for a more precise human analogue we tended to go to the condition to which which We call SITUS INVERSUS. People with this condition, also of genetic origin, develop one or more organs on the “incorrect” side, for example they can have the heart to the right and the liver to the left. This condition occurs in around one person in 10,000 and rarely generates disorders, but in the case of these mollusks, the investment of their snail can cause problems, for example, making it difficult to reproduce these animals. A vital gene. Understanding the genetics responsible for change in these animals is important since it can give us clues about the evolution that was modeling the different genera and gastropod species. According to Explain the team Responsible for discovering the main gene involved in this differentiation, throughout the evolution, these changes resulted in the appearance of new species, something striking when it comes to mutations that hinder reproduction. Laboratory snails. The team conducted its study with a variant of snails of the species Bradybaena Similaris. The variant has the characteristic of presenting a high prevalence of “left -handed” snails, almost half of the specimens are born with this characteristic. The team compared the genes of the mice born with shells that turned to either side. They discovered that the main difference was in a gene, Diaph, but not in the gene itself but in its expression. The details of the study were published In an article In the magazine Zoological Letters. Jeremy’s curious case. Perhaps the most famous snail to present this anomaly was a British snail nicknamed Jeremy in honor of politician Jeremy Corbyn, the leftist politician who was twice a candidate for prime minister in the United Kingdom. Jeremy was the protagonist of another investigation whose results postulated an alternative hypothesis to genetics based. The team responsible for the study concluded, after gathering numerous specimens such as Jeremy so that they could reproduce between them, that the change obeyed external forcesnot by genetic inheritance but for accidents in development. The study, Posted in 2020 In the magazine Biology Lettersreminds us that we will still have to investigate these mollusks, their genetics and their development, if we want to know exactly what phenomenon is behind this unique characteristic of a small amount of snails and, above all, of its implications. In Xataka | They identify the smallest land snail species: Round 0.5 mm high and its discoverers needed brushes and microscope Image | Angus Davison

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