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Tag Archives: Parasitism

Become part of a research project about zombie ants!

21 Saturday Dec 2013

Posted by sedeer in Arthropods, Disease, Hymenoptera, Insects, Microbiology

≈ 4 Comments

Tags

Ant, ants, biology, Coryceps, crowd funding, fungus, manipulation, microbes, Microryza, mind control, Ophiocordyceps unilateralis, Parasitism, Popular science, Research, science, science and society

zombie ant fungus (Photo credit: pennstatenews)I’ve written about mind-controlling parasites and I’ve also written about ants a couple of times, but for some reason I still haven’t written about the famous “zombie ants“. These fascinating, macabre little wonders are ants that have been infected by a fungus (Ophiocordyceps unilateralis) which manipulates their behaviour. The fungus makes the ant climb up at plant stalk and bite into the underside of a leaf, clinging to it in a death grip. The fungus then kills the ant, consuming its innards before sending a reproductive stalk out through the corpse’s head.

I recently found out about an exciting research project looking into how the fungus manages its manipulation of the ant. Charissa de Bekker, a post-doc at Penn State University, is using Microryza to crowdfund her project, which will investigate what genes are active in the fungus’ manipulation of the ant. Since I think it’s an awesome project, I invited her to answer a few questions about herself and her work. Read on to find out what she has to say, and if you think the project sounds interesting or useful, consider backing it on Microryza — she’s got 11 days left to reach her goal! Continue reading →

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The wasp and the cockroach: a zombie story

09 Thursday May 2013

Posted by sedeer in Arthropods, Hymenoptera, Insects

≈ 10 Comments

Tags

Ampulex, behaviour, biology, Emerald cockroach wasp, manipulation, nature, parasite, Parasitism, Parasitoid, Parasitoid wasp, Popular science, science

Ampulex compressa, commonly called Emerald Cockroach Wasp. Pictured in Dar es salaam, Tanzania. (Photo credit: Wikipedia)The world of parasites is full of incredible tales of manipulation and mind-control as these creatures twist their hosts to their needs.  Ever since I first heard of parasitoid wasps, I’ve been drawn to them by a delicious mixture of schadenfreude and intellectual fascination.  (Technically, parasitoids are slightly different from parasites, but that’s not important right now.)  Some of the examples of manipulation by parasitoid wasps are just wonderfully, horribly macabre.  I briefly mentioned the emerald cockroach wasp in a previous post; this time I’ll give a few other examples and explain the emerald wasp more thoroughly.  Hopefully I’ll manage to share some of my excitement about these amazing creatures, which made Darwin once write: “I cannot persuade myself that a beneficent and omnipotent God would have designedly created the Ichneumonidae [a group of parasitoid wasps] with the express intention of their feeding within the living bodies of caterpillars, or the cat should play with mice.”
Continue reading →

What makes you who you are?

14 Thursday Feb 2013

Posted by sedeer in Discussions, Humans

≈ 24 Comments

Tags

Behavior, biology, Emerald cockroach wasp, identity, Parasitism, Parasitoid wasp, Popular science, science, Toxoplasma gondii, Toxoplasmosis

Ampulex compressa, commonly called Emerald Cockroach Wasp. Pictured in Dar es salaam, Tanzania. (Photo credit: Wikipedia)“I’m sorry about what happened yesterday. I…I wasn’t myself.” Those words, or something like them, have been offered countless times as an explanation for (mis)behaviour, but what do they actually mean? People seem to have a sense of an intrinsic self, a personality they identify with, and many people are concerned about how outside factors might (like birth control pills) influence this personality or change the way they behave. In this post, I’d like to explore how we construct and define our sense of self, but rather than writing an essay on the subject, I’m hoping to start a discussion about it. Continue reading →

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All text and original images by Sedeer El-Showk. Licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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