Blood molecule that attracts wolves, repels humans - researchersOctober 23, 2017 - 16:57 AMT PanARMENIAN.Net - The faintest whiff of a molecule from mammal blood known as E2D sends some animals into a predatory frenzy but frightens others -- including people -- into retreat, scientists have discovered, according to AFP. Never before has the same molecule been known to provoke diametrically opposite behaviours in creatures ranging from horse flies to humans, hinting at deep evolutionary roots, they reported in the journal Scientific Reports. Animals, and especially mammals, use their sense of smell to find food, hook up with partners, and detect danger. Many of these chemical triggers are specific to one species, or work in combination with other odours. But E2D -- said to give blood a metallic aroma -- appears to be in a class of its own. "The odour of blood is characterised by a rare universality," senior author Johan Lundstrom, a biologist at the Karolinska Institute in Sweden, told AFP. In earlier research, authors participating in the study isolated E2D from pig's blood and showed that wild dogs and tigers were no less attracted to its scent than to blood itself. The new team duplicated those experiments, this time with wolves, and got the same result: the pack licked, bit and protected a piece of wood smeared with a synthetic version of the molecule as if it were a fresh kill. Blood-sucking horse flies were likewise drawn to it, showing equal enthusiasm for E2D and animal blood. But what about the hunted rather than the hunter? If the molecule has persisted across tens, or even hundreds of millions of years, the scientists reasoned, then perhaps they would react too, though not in the same way. "We hypothesised that prey species would be under evolutionary pressure to become sensitive to E2D, to help them avoid an area where a bloodbath is going on," said Lundstrom. Sure enough, rodents in a cage recoiled from the molecule, as much as they did from the red stuff. Photo. AFP/JOE KLAMAR Top stories Authorities said a total of 192 Azerbaijani troops were killed and 511 were wounded during Azerbaijan’s offensive. In 2023, the Azerbaijani government will increase the country’s defense budget by more than 1.1 billion manats ($650 million). The bill, published on Monday, is designed to "eliminate the shortcomings of an unreasonably broad interpretation of the key concept of "compatriot". The earthquake caused a temporary blackout, damaged many buildings and closed a number of rural roads. Partner news | Scholz hopes Armenia-Azerbaijan peace treaty will be signed this year German Chancellor Olaf Scholz hopes that a peace treaty between Armenia and Azerbaijan will be signed this year. Ucom equips four bus stops in Ijevan with free Wi-Fi Ucom now provides free Wi-Fi coverage in smart bus stops in four communities of Ijevan. Armenia, Russia discuss life extension of Metsamor nuclear plant Issues regarding the extension of life of the 2nd power unit of the Armenian Nuclear Power Plant were discussed in Yerevan. Armenians stage more campaigns against territorial concessions to Azerbaijan Protesters blocked more roads across Armenia on Friday, April 26 in continuing attempts to scuttle territorial concessions to Azerbaijan. |