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[科学美国人60秒] 【整理】SSS 2008-02-05

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SSS 2008-02-05

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Parasitized Ants Get Berry Sick


A nematode parasite causes ants to look like berries that birds like, putting ants on the diet and helping to spread the parasite. Cynthia Graber reports.




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【整理】SSS 2008-02-05【整理人】ZPC224
Transcript

This is Scientific Americans' 60-Second Science. I’m Cynthia Graber. This’ll just take a minute.

When is an ant like a piece of fruit? When it’s infected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of a certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasite eggs in their droppings. Ants forage through bird droppings for seeds. They feed the infected droppings to ant larvae beginning the infection process all over again. The red-bellied ant is the first known case of a parasite causing fruit mimicry. One of the researchers was surprised to that something dumb as a nematode can manipulate its host in such a sophisticated way, but evolution works no matter how dumb organisms are.

Thanks for the minute for Scientific Americans' 60-Second Science, I’m Cynthia Graber.

==========
abdomen: 腹, 腹部
specimen: 范例, 标本, 样品, 样本, 待试验物
nematode : n. 线虫类 adj. 线虫类的
forage : To wander in search of food or provisions
larvae(larva): juvenile form of animals with indirect development 幼虫
mimicry: n. 模仿
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This is Scientific American 60-Second Science. I’m Cynthia Graber. This will just take a minute.

When is an ant like a piece of food? When it’s affect by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of certain species of ant. They found some colony members with bright red /. The scientists took specimen back to the lab and discovered that they were full of hundreds of nematode X. The bright red berry looks suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get the birds to eat the ants. Birds usually keep the ants off their menu because they are armored and are bad chemical taste. The birds then spread parasites eggs in their droppings. Ants forge the bird droppings for seats. They feed the infected droppings to /, beginning the infection process all over again. The red bullet ant is the first known case of parasite causing food /. One of the researchers was surprised that something dumped as a nematode can manipulate host in such a sophisticated way, but evolution works no matter how dumped organism are.

Thanks for the minute. For Scientific American 60-Second Science, I’m Cynthia Graber.
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This is Scientific American’s 60-Second Science. I’m Cynthia Graber. This’ll just take a minute.

When is an ant like a piece of fruit? When it’s affected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of a certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered that they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get / birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasites eggs in their droppings. Ants forge through / bird droppings for seeds. They feed the infected droppings to ant larvae, beginning the infection process all over again. The red-bellied ant is the first known case of parasite causing fruit mimicry. One of the researchers was surprised that something dumb as a nematode can manipulate its host in such a sophisticated way, but evolution works no matter how dumb organisms are.

Thanks for the minute for Scientific American’s 60-Second Science, I’m Cynthia Graber.


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On DaveyZhou
This is Scientific American’s 60-Second Science. I’m Cynthia Graber. This’ll just take a minute.

When is an ant like a piece of fruit? When it’s infected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of / certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered / they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get / birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasites eggs in their droppings. Ants forge through / bird droppings for seeds. They feed the infected droppings to ant larvae, beginning the infection process all over again. The red-bellied ant is the first known case of parasite causing fruit mimicry. One of the researchers was surprised that something dumb as a nematode can manipulate its host in such a sophisticated way, but evolution works no matter how dumb organisms are.

Thanks for the minute for Scientific American’s 60-Second Science, I’m Cynthia Graber.
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This is Scientific American’s 60-Second Science. I’m Cynthia Graber. This’ll just take a minute.

When is an ant like a piece of fruit? When it’s infected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasite/ eggs in their droppings. Ants forage through bird droppings for seeds. They feed the infected droppings to ant larvae, beginning the infection process all over again. The red-bellied ant is the first known case of a parasite causing fruit mimicry. One of the researchers was surprised that something dumb as a nematode can manipulate its host in such a sophisticated way, but evolution works no matter how dumb organisms are.

Thanks for the minute for Scientific American’s 60-Second Science, I’m Cynthia Graber.
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homework

This is Scientific American’s 60-Second Science. I’m Cynthia Graber. This’ll just take a minute.

When is an ant like a piece of fruit? When it’s infected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasite eggs in their droppings. Ants forage through bird droppings for seeds. They feed the infected droppings to ant larvae, beginning the infection process all over again. The red-bellied ant is the first known case of a parasite causing fruit mimicry. One of the researchers was surprised that something dumb as a nematode can manipulate its host in such a sophisticated way, but evolution works no matter how dumb organisms are.

Thanks for the minute for Scientific American’s 60-Second Science, I’m Cynthia Graber.
Stay foolish. Stay hungry.
On skyRo smile.gif

This is Scientific Americans' 60-Second Science. I’m Cynthia Graber. This’ll just take a minute.

When is an ant like a piece of fruit? When it’s infected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of a certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasite/ eggs in their droppings. Ants forage through bird droppings for seeds. They feed the infected droppings to ant larva/, beginning the infection process all over again. The red-bellied ant is the first known case of a parasite causing fruit mimicry. One of the researchers was surprised to that something dumb as a nematode can manipulate its host in such a sophisticated way, but evolution works no matter how dumb organisms are.

Thanks for the minute for Scientific Americans' 60-Second Science, I’m Cynthia Graber.
I'm going to be a millionaire!
实现无障碍英语沟通
On skyRo smile.gif

This is Scientific Americans' 60-Second Science. I’m Cynthia Graber. This’ll just take a minute.

When is an ant like a piece of fruit? When it’s infected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of a certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. Researchers think that the nematode makes the ant look like fruit to get birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasite/ eggs in their droppings. Ants forage through bird droppings for seeds. They feed the infected droppings to ant larvae beginning the infection process all over again. The red-bellied ant is the first known case of a parasite causing fruit mimicry. One of the researchers was surprised to that something dumb as a nematode can manipulate its host in such a sophisticated way, but evolution works no matter how dumb organisms are.

Thanks for the minute for Scientific Americans' 60-Second Science, I’m Cynthia Graber.
I'm going to be a millionaire!
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