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Locust Swarm Turned On By Brain Chemicals

Posted by: biologyblog | January 30, 2009 | 3 Comments |



This story comes from my co-teacher, Mr. Wolsko:

Scientists at Cambridge University have discovered that serotonin, a chemical that affects people’s moods also can transform easygoing desert locusts into terrifying swarms that ravage the countryside, in many parts of the world.

Locusts, a member of the grasshopper family live an interesting life.  Sometimes they live solitary lives.  Other times, they can be found in swarms of billions.

In her 1937 novel On the Banks of Plum Creek, Laura Ingalls Wilder wrote of a “glittering cloud” of locusts so large it blocked out the sun as it approached. The swarm descended upon her family’s farm near Walnut Grove, Minnesota, destroying a year’s wheat crop and stripping the prairie bare of all vegetation.

Though no longer a problem in the United States, Locusts still plague many parts of Africa, Asia, and Australia.


Dr Swidbert Ott
,  one of the co-authors of the article, said:”Serotonin profoundly influences how we humans behave and interact, so to find that the same chemical in the brain is what causes a normally shy antisocial insect to gang up in huge groups is amazing.”

People throughout the world once used dangerous pesticides, like DDT, to combat the threat of locusts.  Based on this new discovery, people could instead spray a compound on the gathering locusts that blocks their serotonin receptors and thus prevents them from swarming.

Source:
http://www.admin.cam.ac.uk/news/dp/2009013001

Related Stories
http://news.nationalgeographic.com/news/2009/01/090129-locusts-swarm.html?source=rss

under: Environmental Biology, Human Biology
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What a cool article. If I am correct, Prozac and drugs like it already work with serotonin. This means we are altering the moods of people with serotonin like drugs and this article is saying that we may be able to do the same with insects such as locusts rather then killing them with pesticides. That would be a really big breakthrough for science.

That is a very interesting article. i have seen locus before but only in small groups of 5-10. they haven’t been a big issue and i have heard of what they can do. they can cause major periods of famine because they strip all the food from the land and the people are usually not in the greatest conditions to begin with and so they have no way of replacing the food they lost and end up dying. that is very helpful to know that that such a simple drug as Serotonin can easily stop them from swarming in and destroying precious food that people need too survive. often in the past when the grass was sprayed with pesticides people where not allowed to go on the ground due to health issues. this not only affected our lives but it caused major devestation in the natural food chain of wild animals. alot of animal numbers decreased due to poor diet or from the pesticides that their prey had consumed. so to know that we no longer have to worry about yet, another threat to the earth, is a good sign.

I enjoyed reading this article a lot. This article of the locusts remind me of cicadas. The cicadas come out every seven years and there are millions of them. I remember when I was very young and the cicadas came out. I couldn’t go out side without stepping on at least twenty of them and getting them all in my face. I did not know that Serotonin affects moods of people. Isn’t it illegal in the United States?

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