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Tuesday, September 1, 2015

Nick Bos, of the University of Helsinki, studies “the amazing adaptations social insects have evolved in order to fight the extreme parasite pressure they experience”. In a recently-accepted Evolution paper Bos and colleagues describe ants appearing to self-medicate.

The team used Formica fusca, an ant species that can form thousand-strong colonies. This common black ant eats other insects, and also aphid honeydew. It often nests in tree stumps or under rocks and foraging workers can sometimes be spotted climbing trees.

Some ants were infected with Beauveria bassiana, a fungus. Infected ants chose food laced with toxic hydrogen peroxide, whereas healthy ants avoided it. Hydrogen peroxide reduced infected ant fatalities by 15%, and the ants varied their intake depending upon how high the peroxide concentration was.

In the wild, Formica fusca can encounter similar chemicals in aphids and dead ants. The Independent reported self-medicating ants a first among insects.

Bos obtained his doctorate from the University of Copenhagen. He began postdoctoral research at Helsinki in 2012. He also runs the AntyScience blog. The blog aims to help address “a gap between scientists and ‘the general public’.” The name is a pun referencing ants, its primary topic, science, and “non-scientific” jargon-free communication. He now discusses his work with Wikinews.

((Wikinews)) What first attracted you to researching ants?

Nick Bos Me and a studymate were keeping a lot of animals during our studies, from beetles, to butterflies and mantids, to ants. We had the ants in an observation nest, and I could just look at them for hours, watching them go about. This was in my third year of Biology study I think. After a while I needed to start thinking about an internship for my M.Sc. studies, and decided to write a couple of professors. I ended up going to the Centre for Social Evolution at the University of Copenhagen where I did a project on learning in Ants under supervision of Prof. Patrizia d’Ettorre. I liked it so much there I ended up doing a PhD and I’ve been working on social insects ever since.

((Wikinews)) What methods and equipment were used for this investigation?

NB This is a fun one. I try to work on a very low budget, and like to build most of the experimental setups myself (we actually have equipment in the lab nicknamed the ‘Nickinator’, ‘i-Nick’ and the ‘Nicktendo64’). There’s not that much money in fundamental science at the moment, so I try to cut the costs wherever possible. We collected wild colonies of Formica fusca by searching through old tree-trunks in old logging sites in southern Finland. We then housed the ants in nests I made using Y-tong [aerated concrete]. It’s very soft stone that you can easily carve. We carved out little squares for the ants to live in (covered with old CD covers to prevent them escaping!). We then drilled a tunnel to a pot (the foraging arena), where the ants got the choice between the food with medicine and the food without.

We infected the ants by preparing a solution of the fungus Beauveria bassiana. Afterwards, each ant was dipped in the solution for a couple of seconds, dried on a cloth and put in the nest. After exposing the ants to the fungus, we took pictures of each foraging arena three times per day, and counted how many ants were present on each food-source.

This gave us the data that ants choose more medicine after they have been infected.

The result that healthy ants die sooner when ingesting ROS [Reactive Oxygen Species, the group of chemicals that includes hydrogen peroxide] but infected ants die less was obtained in another way (as you have to ‘force feed’ the ROS, as healthy ants, when given the choice, ignore that food-source.)

For this we basically put colonies on a diet of either food with medicine or without for a while. And afterwards either infected them or not. Then for about two weeks we count every day how many ants died. This gives us the data to do a so-called survival analysis.

We measured the ROS-concentration in the bodies of ants after they ingested the food with the medicine using a spectrophotometer. By adding certain chemicals, the ROS can be measured using the emission of light of a certain wave-length.

The detrimental effect of ROS on spores was easy to measure. We mixed different concentrations of ROS with the spores, plated them out on petridishes with an agar-solution where fungus can grow on. A day after, we counted how many spores were still alive.

((Wikinews)) How reliable do you consider your results to be?

NB The results we got are very reliable. We had a lot of colonies containing a lot of ants, and wherever possible we conducted the experiment blind. This means the experimenter doesn’t know which ants belong to which treatment, so it’s impossible to influence the results with ‘observer bias’. However, of course this is proof in just one species. It is hard to extrapolate to other ants, as different species lead very different lives.

((Wikinews)) Where did the ants and fungus you used come from? How common are they in the wild?

NB For ants, see above about the collection.

This species of fungus does appear in Finland, but we chose to use a different strain from Denmark (with thanks to Prof. J. Eilenberg and the laboratory technician Louise Lee Munch Larsen from the University of Copenhagen). Animals can adapt to local strains (‘local adaptation’), and just to make sure we thought it would be good to use a strain of fungus that the ants definitely did not evolve specific resistances against. This means that the reaction of the ants (to self-medicate) is very likely to be a general response, and not just against their local fungal enemies.

((Wikinews)) Are there any ethical considerations around exposing ants to toxins and parasites?

NB Legally, no. Insects do not have any ‘rights’ as such regarding ethics. That said, we do take measures to not make them ‘suffer unnecessarily’. For example, dissections are done when the ants are anesthetized (either by CO2 or Ice), and when ants need to be killed, we do it in alcohol, which kills the ants in a matter of seconds. So while the ants do not have ‘rights’ as such, we still try to handle them with as much respect as possible (even though the experiment involves infecting them with a deadly fungus).

But even though the 12,000 ants in our study sounds like a lot (and it is), this is negligible in the ‘grand scheme of things’. It has been calculated that in the Netherlands alone, nearly a trillion insects die against just the licence-plates of cars every six months. I don’t own a car, so that means I’m excused right? 😉

((Wikinews)) This is the first evidence for self-medicating insects. How widespread do you think this phenomenon could be in reality?

NB It’s not actually the first evidence for self-medication in insects. Moths and fruit flies definitely do it, and there’s evidence in honey bees and bumble-bees as well. So it seems to be quite wide-spread in the insect world. I have no doubt that as time goes on, there will be more and more cases documented. Insects (and animals in general) seem to be quite good at taking care of themselves.

((Wikinews)) How might ants locate healing substances in the wild?

NB Very good question. This is something that’s important to know. If they would only do it in the lab, the behaviour wouldn’t be very interesting. We have some guesses where they might get it from, but at the moment we don’t know yet. That said, I plan to investigate this question (among others) further [in] the next couple of years.

((Wikinews)) For your PhD you researched ants’ scent-based communications. Could healthy ants perhaps tell other ants are infected and encourage this behaviour?

NB There’s not much known about this. There’s conflicting evidence about whether sick ants actually smell different from healthy ones or not. At the moment it seems that sick ants mostly take care of the problem themselves. Sick ants stop most interaction with nestmates and especially brood, and leave the nest to die in isolation. This is probably for reducing chance of infecting nestmates, but of course it also reduces the work load of their nest-mates, as their corpse doesn’t have to be dragged out etc.

So as an answer to the question, I would find it unlikely that such a behaviour would evolve, but it’s not known yet.

((Wikinews)) Ants generally avoided the peroxide if they were healthy, but in some circumstances might they try to build resistance against infection in advance?

NB Who knows? Also not known yet unfortunately. That said, there is a very interesting study about resin collection in ants. Wood ants collect tree-resin, which has anti-microbial properties. They collect this even if not infected, and when you infect them, they don’t collect more of the resin than normal. So basically it seems like they collect it in order to keep diseases out of the nest, so they stop the disease before it can actually infect them.

((Wikinews)) Are there plans to follow this research up? Might you research other species? Other substances?

NB I first want to find out where they get it from in nature. There might be many sources of medicine (recent evidence suggests that tobacco plays a similar role for bumble bees). Dalial Freitak, who is also on this paper is currently running tests with Ph.D. student Siiri Fuchs (who is also on the paper) with other substances to see if any have the same effect as H2O2 [hydrogen peroxide].

Once the behaviour has been well described in this species of ant, I might do a comparison with other species. For example, once we find the source of the medicine in nature… would species without access to this source also have evolved the same behaviour in the lab? And if so… where would they get it from?

Also… can ants medicate their friends? 🙂

((Wikinews)) What other research are you working on right now?

NB Phew…lots! 🙂

I still have some questions left unanswered from my Ph.D. work related to how ants recognize who is a friend and who isn’t. I also started collaborating with Prof. Michael Poulsen from the University of Copenhagen on immunity in fungus-growing termites, as well as their chemical recognition abilities. Furthermore we’re working on social parasitism in wood-ants (ants have lots of animals exploiting the nest for shelter and resources, which all somehow have to get in to the fortress without getting killed).

A compilation of brief news reports for Thursday, November 13, 2008.

A new study has found that people storing extra fat around their waist have a strongly increased chance of early death, even if their overall weight is average. The study, published in the New England Journal of Medicine today, found that for each addition 5 cm on the waist, the chance of early death is increased by between 13% and 17%.

In the study, 360,000 people from across nine countries in Europe were surveyed.

One of the study’s authors, Professor Elio Riboli of Imperial College London, commented on the findings. “We were surprised to see the waist size having such a powerful effect on people’s health and premature death,” he stated.

Sources

• “‘Love handles’ raise death risk” — BBC News Online, November 13, 2008
• Ian Sample. “Waist, not just weight, shows risk of premature death, study says” — The Guardian, November 13, 2008
• Tobias Pischon et al. “Abstract: General and Abdominal Adiposity and Risk of Death in Europe” — New England Journal of Medicine, November 13, 2008

The European Commission, the executive branch of the European Union, has today lifted its ban on unusually shaped fruits and vegetables, in what the EU’s agriculture commissioner has called “a new dawn for the curvy cucumber and the knobbly carrot”.

The regulation has previously been criticized as an example of the EU’s bureaucracy by critics of the organisation.

The products affected by the deregulation are apricots, artichokes, asparagus, aubergines, avocadoes, beans, Brussels sprouts, carrots, cauliflowers, cherries, courgettes, cucumbers, cultivated mushrooms, garlic, hazelnuts in shell, headed cabbage, leeks, melons, onions, peas, plums, ribbed celery, spinach, walnuts in shell, water melons and witloof/chicory.

Sources

• “EU slices up ‘ugly fruit’ rules” — BBC News Online, November 13, 2008
• “Europe Relaxes Rules on Sale of Ugly Fruits and Vegetables” — New York Times, November 13, 2008

A vase purchased at a car boot sale for £1 has sold for £32,450, following advice from experts on the BBC‘s Antiques Roadshow television program. The vase was sold in an auction at Christie’s.

The vase was found to be a 1929 work made by the French designer Rene Lalique.

Sources

• “Car boot sale vase nets £32,450” — BBC News Online, November 13, 2008
• “£32,449 profit for car boot sale vase by Lalique” — Times Online, November 13, 2008

Recent anonymous press briefings by US State Department officials indicated that its arms control division may punish Blackwater Worldwide for improper paperwork.

The Directorate of Defense Trade Controls has the power to fine or agree voluntary penalties with exporters of certain weapons, who do not follow correct procedures. Blackwater Worldwide, a private military company, exported automatic weapons to Iraq that became the subject of a federal investigation first disclosed in 2007.Concern was expressed by the unnamed officials that paperwork errors may make the weapons untraceable, and that some reached Iraq’s black market.

Sources

• “Blackwater Faces Millions in Fines for Weapons Shipments (radio show transcript)” — Democracy Now!, November 13, 2008
• Knight Ridder / McClatchy Newspapers. “Blackwater faces Fines over Arms Deal” — Military.com, November 13, 2008
• Dan Friedman, Congress Daily. “Blackwater could face sanctions for improper arms shipments” — Government Executive, November 7, 2008

A compilation of brief news reports for Monday, May 7, 2007.

A 30 meter section of a gas pipeline in Luka (near Kiev) in Ukraine has been destroyed by an explosion. Although supplies to Europe via this pipeline have stopped, Ukrainian Energy Minister Georgi E. Boyko said that supplies to Europe would not be affected.

“There are no changes in volumes of gas being transported,” Yuri Korolchuk said. “Volumes due to pass through the damaged section are being redirected through the Soyuz pipeline.”

Normal flows are reported in the Czech Republic, Hungary, Poland and Romania.

Sources

• “Blast damages pipeline in Ukraine” — Russia Today, May 8, 2007
• Natalya Zinets, Reuters. “Blast hits Ukraine gas pipeline” — The Scotsman, May 7, 2007

Copper prices are rising. Between record copper imports from China, and a mining strike in Peru, the prices have climbed to over $8100 (United States dollars) a tonne, for a gain of $575 dollars over the last week. However the upward trend is not new, it has been climbing for quite some time. In April 2003, the price of copper was under $2000 a tonne.

The metal market has been tending up due to growth in the Chinese industrial production. This trickles down to the local level, where the buying price at scrap yards is ever climbing, making scrap metal collection a more profitable endeavour for individual people using pick up trucks or other such vehicles to collect and cash in the scrap metal at metal buying yards. It can be collected via agreements with businesses, from the garbage, or, sometimes, by theft.

Copper prices fell today on the NYMEX commodity exchange from US$3.7545 per pound to US$3.7125 based on the July futures contract.

Sources

• “Copper up but crude oil down” — Financial Express, May 6, 2007
• Millie Munshi. “Metals Bubble Poised to Burst on Increasing Supplies” — Bloomberg L.P., May 7, 2007
• “Commodity Futures” — Bloomberg L.P., accessed May 7, 2007

One man was killed and another injured by an exploding backpack in the parking lot of the Luxor Hotel in Las Vegas, Nevada. The explosion happened at 4 a.m. PDT when the victim tried to remove a the object left on top of his car.

Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) are on the scene. Aerial images did not show any apparent damage.

“We believe the victim was the intended target of this,” Bill Cassell said, spokesperson for the Las Vegas Metropolitan Police Department. “This is being treated as a homicide in which the weapon used to cause death is a non-traditional weapon.”

Both of the victims worked at the Luxor.

Sources

• Associated Press. “1 dead, 1 hurt in Las Vegas parking lot blast” — MSNBC, May 7, 2007
• “Explosion kills man in Vegas outside Luxor hotel” — Reuters, May 7, 2007

Saturday, August 25, 2007

The leading supplier of school uniforms in the United Kingdom, Lancashire-based manufacturer Trutex, has announced it is “seriously considering” including GPS tracking devices in future ranges of its uniform products after conducting an online survey of both parents and children.

“As a direct result of the survey, we are now seriously considering incorporating a [tracking] device into future ranges” said Trutex marketing director Clare Rix.

The survey questioned 809 parents and 444 children aged nine to 16. It showed that 44% of parents were worried about the safety of pre-teen children, and 59% wanted tracking devices installed in school apparel. 39% of children aged nine to 12 were prepared to wear clothing with tracking devices in them, while teenagers were notably less enthusiastic and more wary of what Trutex has admitted they see as a “big brother” concept.

However, Trutex has claimed the tracking devices would bring about worthwhile benefits, including being a valuable resource for parents who wanted to keep a close eye on where their children were at all times.

“As well as being a safety net for parents, there could be real benefits for schools who could keep a closer track on the whereabouts of their pupils, potentially reducing truancy levels” says Rix.

Each year, Trutex supplies 1 million blouses, 1.1 million shirts, 250,000 pairs of trousers, 20,000 blazers, 60,000 skirts and 110,000 pieces of knitwear to the UK.

It is not the first company to manufacture school uniforms with a central focus on child safety; last week Essex firm BladeRunner revealed it was selling stab-proof school blazers to parents concerned about violence against their children. The blazers were outfitted with Kevlar, a synthetic fibre used in body armour. It has already received orders internationally, including Australia.

If the Trutex tracking devices go ahead, it is unclear where in the uniform they will be located.

Tuesday, July 10, 2007

Hundreds of legal, highly-skilled workers in the United States sent hundreds of flowers to the Director of the United States Citizenship and Immigration Services (USCIS), Emilio Gonzalez as part of a symbolic and peaceful protest over what they said was a “flip-flop” by the State Department and the USCIS on eliminating Green card processing delays.

Dr. Gonzalez announced on the USCIS website late last night that the flowers will be forwarded to the injured service members recuperating at Walter Reed Army Medical Center and at Bethesda Naval Hospital.

In response, Immigration Voice, a non-profit organization representing skilled, legal immigrants, said that they welcome the fact that Dr. Gonzalez acknowledged the symbolic gesture of our protest and are overjoyed that these flowers will brighten the day of the injured service brethren.

Immigration Voice also said that it is their sacrifice for American freedom that has made this country great and such a desirable destination for multitude of people from around the world and that they wanted to say “Thank you and god bless you” to the servicemen.

Monday, December 7, 2015

Yesterday, at least seven people including Aden, Yemen governor Jaafar Mohammed Saad died in a car bomb attack on their convoy in the city of Aden, according to local officials. An online claim of responsibility on behalf of militant group ISIS called Saad a “tyrant”.

An online post purportedly from the group claimed they detonated the bomb as Saad’s convoy passed where the car was parked. The post shared photos purporting to show Saad’s vehicle passing the parked car, and the following explosion.

People as much as 10km away reported hearing the explosion, and medics said it left victims’ bodies unrecognizable. Photos supposedly of the attack showed a burning, wrecked car. Aden’s Jumhoriya Hospital treated the victims.

The online statement threatened to “chop off” the “rotten heads” of Yemen’s “infidels”, and said more attacks are coming.

Iran-backed Houthi rebels, who follow Shia Islam, have taken over Yemen’s capital of Sanaa. Until just recently, President Abed Rabbo Mansour Hadi’s government operated for several months in Saudi Arabia, which has led a coalition involving air strikes against the rebels.

Yemeni fatalities in ISIS-claimed bombings this year number reportedly around 159. Yemeni fatalities since March, when Saudi Arabia’s pro-Hadi airstrikes began, number at least 5,700 according to the United Nations.

Friday, September 26, 2008

On October 14, 2008, Canadians will be heading to the polls for the federal election. New Democratic Party candidate Max Lombardi is standing for election in the riding of Cambridge. Lombardi is an information technology specialist who has lived in Cambridge for 25 years.

Held since 2004 by Conservative Gary Goodyear, the riding of Cambridge includes the city of Cambridge, Ontario and the Township of North Dumfries, Ontario. Also running in the riding are Gord Zeilstra (Liberal) and Scott Cosman (Green).

Wikinews contacted Max Lombardi, to talk about the issues facing Canadians, and what they and their party would do to address them. Wikinews is in the process of contacting every candidate, in every riding across the country, no matter their political stripe. All interviews are conducted over e-mail, and interviews are published unedited, allowing candidates to impart their full message to our readers, uninterrupted.

For more information, visit the campaign’s official website, listed below.