So the other day I was driving my kids around and they asked how did the zebra gets its stripes.
The explanation I saw from documentaries stated that zebra evolved its stripes to confuse the lion.
Lions are color blind,as are many cats, so a group of rampaging zebras can be extremely confusing and headache-inducing. With the tall African savannah grasses, one can easily see that the stripes, combined with the tall grasses could easily break up the lines of a zebra and be confusing to predators. Sounds right, so I figured that wrapped up that little science lesson. But I got home and did some research on the subject.
Like us, animals hate parasites too, and one parasite, the female horseflies (tanabids) can deliver one hell of a bite. Like female mosquitoes, they feed on mammal blood for reproduction, and they carry diseases too.Locally mosquitos transmit the dinofilaria (Heartworm) parasite to dogs and cats, so it makes sense from an evolutionary viewpoint to develop a natural "Frontline" so to speak.
They lay their eggs on stones or vegetation close to water, guided by the horizontally polarized light reflected from the water surface. And these evil vampires are also guided to their meals via horizontally polarized light reflected from animal skin.
To test this, the team traveled to a horsefly-infested farm in Budapest and set up three horse model; a white, a dark, and a striped model. Interestingly, the striped model was the least attractive to horseflies. The team also varied the width, density, and angle of the stripes, and found out that narrower stripes attracted fewer tanabids.
The team pointed out that developing zebra embryos start out with a dark skin, only to develop white stripes afterwards. It's possible that evolution has favored the development of zebra stripes to confuse color-blind predators, as well as ward off blood-thirsty vampires.
Should we do the same to ward off mosquitoes? Who knows, perhaps I will develop a line of striped clothing for hikers and make a fortune warding off blood sucking insects. At the very least it may save you from a Lion attack.
info:
Polarotactic tabanids find striped patterns with brightness and/or polarization modulation least attractive: an advantage of zebra stripes, Ádám Egri et. al, J Exp Biol 215, March 1, 2012 736-745.
Lions are color blind,as are many cats, so a group of rampaging zebras can be extremely confusing and headache-inducing. With the tall African savannah grasses, one can easily see that the stripes, combined with the tall grasses could easily break up the lines of a zebra and be confusing to predators. Sounds right, so I figured that wrapped up that little science lesson. But I got home and did some research on the subject.
I found an entirely plausible other reason for the strips. Gabor Horvath and colleagues from Hungary and Sweden have come up with another explanation: zebra's stripes ward off blood-sucking parasites.
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| Image: animals.howstuffworks.com |
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| Image: en.wikipedia.org |
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| Image: whatis.techtarget.com |
The team pointed out that developing zebra embryos start out with a dark skin, only to develop white stripes afterwards. It's possible that evolution has favored the development of zebra stripes to confuse color-blind predators, as well as ward off blood-thirsty vampires.
Should we do the same to ward off mosquitoes? Who knows, perhaps I will develop a line of striped clothing for hikers and make a fortune warding off blood sucking insects. At the very least it may save you from a Lion attack.
info:
Polarotactic tabanids find striped patterns with brightness and/or polarization modulation least attractive: an advantage of zebra stripes, Ádám Egri et. al, J Exp Biol 215, March 1, 2012 736-745.
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