Mouse Aversion To Cat Urine Behavior Experiment
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[Mouse Aversion To Cat Urine Behavior Experiment]
[Wendy [Marie] Ingram:] Source: LYBIO.net
Hi, I’m Wendy Ingram and I’m a graduate student at the University of California Berkeley. I study a brain parasite that’s carried by cats called Toxoplasma gondii. When mice and rats are infected, it’s very interesting because they seem to lose their innate hardwired fear of their natural predator cats to the benefit of the parasite. I’m going to show you how we studied this behavior change in the controlled setting of a laboratory.
First, we secure a small dish to the bottom of one end of a behavioral arena. We then added a small amount of either cat urine or rabbit urine used as a control to the dish. We then placed the arena in a specialized device that is able to record the movement of the mice. After that we take a mouse gently by the tail and very carefully placed it in the center of the arena.
A cover goes on top and we can push a button to start recording the experiment. We then turn out the lights because mice are nocturnal. While in the dark the mouse will explore the arena and encounter the urine in the dish at one end. If the mouse is uninfected and smells cat urine, it will retreat to the opposite end of the enclosure, whereas a mouse infected with toxoplasma will not do so.
A set of infrared beams that are located around the smart frame will form a grid and as the mouse moves around the enclosure each beam that is broken will be recorded by a computer. We have sixteen of these devices to simultaneously record mice.
Mouse Aversion To Cat Urine Behavior Experiment. I study a brain parasite that’s carried by cats called Toxoplasma gondii. Complete Full Transcript, Dialogue, Remarks, Saying, Quotes, Words And Text.