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WASHINGTON D.J. Swearinger Kids Jersey , Feb. 5 (Xinhua) -- Chimpanzees are capable of learning calls that refer to specific food items such as apple to communicate better with other members of their species, according to a study of two separate groups that were merged together at Britain's Edinburgh Zoo.

The findings, published Thursday in the U.S. journal Current Biology, suggested that human language isn't as unique as we thought in its ability to reference external objects with socially learned symbols.

Chimpanzees are known to produce alarm and food calls that refer to objects in their environment. However, so far researchers assumed that these calls are just an expression of their excitement and cannot be controlled by the chimpanzees.

In 2010 Adrian Peterson Kids Jersey , a group of adult chimpanzees from Beekse Bergen Safari Park in the Netherlands were introduced to a group of chimpanzees at the Edinburgh Zoo, and that provided researchers an opportunity to study whether chimpanzees are capable of changing their calls to sound more like their new neighbors.

The researchers observed that before the integration the two groups produced acoustically different grunt calls for apple and furthermore had different preferences for apple.

After the integration of the two groups, the researchers discovered that the acoustic structure of the grunt calls of the new group members had been adapted to the ones produced by the chimpanzees already living there.

"Three years after the integration, the grunt calls of the new chimpanzees very much resembled the grunt calls produced by the Edinburgh chimpanzees," said study author Simon Townsend of the University of Zurich in Switzerland. "The preferences for apple in these chimpanzees stayed the same during this period Alex Smith Kids Jersey , but the grunt calls changed."

The researchers found that the fact that they lived together for a year and heard the different grunt call for apple from the other group members was not sufficient to cause the changes in their call structure.

Only in 2013, when analyses of the social network showed strong friendships between the two group members were formed, a change in the call structure could be observed, they said.

The findings "represent the first evidence of non-human animals actively modifying and socially learning the structure of a meaningful referential vocalization" from other members of their species, the researchers wrote.

"The fact Redskins Matthew Ioannidis Jersey , that not only humans, but also chimpanzees learn object-specific calls suggests that our common ancestor that lived more than 7 million years ago also possessed this ability," Townsend added.

NAIROBI, Mar. 3 (Xinhua) -- Kenya has invited South Africa, Nigeria and Botswana sprinters to compete in the final two relay meetings in Nairobi to inspire the local team to clock required qualification marks for the World Relay Championships in May.

Athletics Kenya (AK) said Tuesday the country is yet to secure qualification for the 4x400m and 4x200m distances ahead of the May 2-3 World Relay Championships in Nassau Redskins D.J. Swearinger Jersey , Bahamas.

"We want quality competition, and for our athletes to be able to secure the required qualification, they have to be pushed," AK Vice President David Okeyo said in Nairobi.

IAAF demand that for the results of relay races shall be valid only on condition that they are part of a competition staged in compliance with IAAF Rules and that at least two different international teams, representing at least two countries Redskins Adrian Peterson Jersey , compete in the race.

Kenya targets to get the qualification mark in Nairobi and then head to Nassau hoping to finish among the top eight countries in either races so as to qualify for the World Championships in Beijing in August.

Kenya has two meetings in Nairobi on March 14 and 21 before the national trials on April 1 where a team of sprinters will be picked for the second IAAF World Relays set for Nassau, Bahamas on May 2-3.

Last year, the Kenyan team broke world records in 4x1500m men's and women's races. Okeyo said they are keen to repeat the same in 2015.

World 800m record holder David Rudisha and world 1,500m champion Asbel Kiprop are expected to anchor the men charges.

Rudisha, who won silver medal at the Commonwealth Games in Glasgow Redskins Alex Smith Jersey , Scotland, last year, will meet 2007 world 800m champion Alfred Kirwa Yego and Commonwealth Games 800m bronze medalist Abraham Kiplagat.

But Kiprop, who could not attain his bid to break the metric mile race world record at the Diamond League meet in Monaco in July last year, would be out to signal his ambitions for the season.

The 26-year-old Kiprop will go head to head with Nixon Chepseba Black Matthew Ioannidis Jersey , former world indoor silver medalist Daniel Kipchirchir champion James Magut.

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