SANTA CRUZ, Calif., Sept. 28 (UPI) -- A U.S. researcher says he has captured the first video showing the use of a tool by fish.
In a video taken by University of California, Santa Cruz, biologist Giacomo Bernardi in Palau in 2009, an orange-dotted tuskfish digs a clam out of the sand, carries it over to a rock, and repeatedly drops or bangs the clam against the rock to crush it.
"What the movie shows is very interesting. The animal excavates sand to get the shell out, then swims for a long time to find an appropriate area where it can crack the shell," Bernardi said in a university release Wednesday. "It requires a lot of forward thinking, because there are a number of steps involved. For a fish, it's a pretty big deal."
The video evidence supports previous reports of tool use by fish, all involving a species of wrasse using a rock as an anvil to crush shellfish.
"Wrasses are very inquisitive animals," Bernardi said. "They are all carnivorous, and they are very sensitive to smell and vision."
Tool use was once considered an exclusively human trait but many other animals have been observed using tools, including various primates, several kinds of birds, dolphins and elephants.
Read more: http://www.upi.com/Science_News/2011/09/28/Tool-use-by-marine-fish-caught-on-video/UPI-22091317255853/#ixzz1ZQxkTh8E
Showing posts with label tool use. Show all posts
Showing posts with label tool use. Show all posts
Friday, September 30, 2011
Thursday, January 6, 2011
Capuchin monkeys choose the best tools to crack nuts
Wild capuchin monkeys are very selective about the best way to crack a nut, according to scientists.
Researchers from the University of Georgia, US, filmed the wild monkeys selecting the correct anvil and hammer for the job.
The footage reveals that the animals are "selective about the materials they use in tool use", say the scientists.
The research team have reported their findings in the journal Animal Behaviour.
The monkeys use pits in logs as anvils, to lodge the nuts in place while they use large stones as hammers to bash through the shells.
In the footage, the monkey can be seen "weighing up" the most appropriately sized pit.
Qing Liu, who led the study, said it was the first demonstration of the animals' ability to "measure" how appropriate a particular anvil was for a specific job.
Previously, researchers had found that the monkeys selected just the right stone for nut-cracking.
But it seems they are also good at choosing the most effective anvil surface, said Ms Liu. "Even when this is not something visible."
"The effectiveness is equivalent to the number of strikes needed to crack a nut in that pit - the lower the better."
"The detection of such a complex property has not been demonstrated in animal tool use before, as far as I know."
Because capuchin monkeys are social animals, they are also likely to watch and learn from other monkeys attempting the same task.
But if the pit they start with is ineffective, the animals usually "self-correct", evaluating their success and making an independent choice.
http://news.bbc.co.uk/earth/hi/earth_news/newsid_9326000/9326563.stm
Researchers from the University of Georgia, US, filmed the wild monkeys selecting the correct anvil and hammer for the job.
The footage reveals that the animals are "selective about the materials they use in tool use", say the scientists.
The research team have reported their findings in the journal Animal Behaviour.
The monkeys use pits in logs as anvils, to lodge the nuts in place while they use large stones as hammers to bash through the shells.
In the footage, the monkey can be seen "weighing up" the most appropriately sized pit.
Qing Liu, who led the study, said it was the first demonstration of the animals' ability to "measure" how appropriate a particular anvil was for a specific job.
Previously, researchers had found that the monkeys selected just the right stone for nut-cracking.
But it seems they are also good at choosing the most effective anvil surface, said Ms Liu. "Even when this is not something visible."
"The effectiveness is equivalent to the number of strikes needed to crack a nut in that pit - the lower the better."
"The detection of such a complex property has not been demonstrated in animal tool use before, as far as I know."
Because capuchin monkeys are social animals, they are also likely to watch and learn from other monkeys attempting the same task.
But if the pit they start with is ineffective, the animals usually "self-correct", evaluating their success and making an independent choice.
http://news.bbc.co.uk/earth/hi/earth_news/newsid_9326000/9326563.stm
Capuchin monkeys choose the best tools to crack nuts
Wild capuchin monkeys are very selective about the best way to crack a nut, according to scientists.
Researchers from the University of Georgia, US, filmed the wild monkeys selecting the correct anvil and hammer for the job.
The footage reveals that the animals are "selective about the materials they use in tool use", say the scientists.
The research team have reported their findings in the journal Animal Behaviour.
The monkeys use pits in logs as anvils, to lodge the nuts in place while they use large stones as hammers to bash through the shells.
In the footage, the monkey can be seen "weighing up" the most appropriately sized pit.
Qing Liu, who led the study, said it was the first demonstration of the animals' ability to "measure" how appropriate a particular anvil was for a specific job.
Previously, researchers had found that the monkeys selected just the right stone for nut-cracking.
But it seems they are also good at choosing the most effective anvil surface, said Ms Liu. "Even when this is not something visible."
"The effectiveness is equivalent to the number of strikes needed to crack a nut in that pit - the lower the better."
"The detection of such a complex property has not been demonstrated in animal tool use before, as far as I know."
Because capuchin monkeys are social animals, they are also likely to watch and learn from other monkeys attempting the same task.
But if the pit they start with is ineffective, the animals usually "self-correct", evaluating their success and making an independent choice.
http://news.bbc.co.uk/earth/hi/earth_news/newsid_9326000/9326563.stm
Researchers from the University of Georgia, US, filmed the wild monkeys selecting the correct anvil and hammer for the job.
The footage reveals that the animals are "selective about the materials they use in tool use", say the scientists.
The research team have reported their findings in the journal Animal Behaviour.
The monkeys use pits in logs as anvils, to lodge the nuts in place while they use large stones as hammers to bash through the shells.
In the footage, the monkey can be seen "weighing up" the most appropriately sized pit.
Qing Liu, who led the study, said it was the first demonstration of the animals' ability to "measure" how appropriate a particular anvil was for a specific job.
Previously, researchers had found that the monkeys selected just the right stone for nut-cracking.
But it seems they are also good at choosing the most effective anvil surface, said Ms Liu. "Even when this is not something visible."
"The effectiveness is equivalent to the number of strikes needed to crack a nut in that pit - the lower the better."
"The detection of such a complex property has not been demonstrated in animal tool use before, as far as I know."
Because capuchin monkeys are social animals, they are also likely to watch and learn from other monkeys attempting the same task.
But if the pit they start with is ineffective, the animals usually "self-correct", evaluating their success and making an independent choice.
http://news.bbc.co.uk/earth/hi/earth_news/newsid_9326000/9326563.stm
Subscribe to:
Posts (Atom)