Navigation Links
Island monkeys do not recognize big cat calls
Date:1/17/2008

Monkeys living on an island without big cat predators do not show any particular alarm when recorded tiger growls are played to them, according to research by a UC Davis graduate student. The pig-tailed langurs do, however, flee in a hurry from the sound of human voices.

"This contributes to a growing literature on how animal behavior changes under relaxed selection pressures," said Jessica Yorzinski, a graduate student in animal behavior at UC Davis, who authored the study with Thomas Ziegler of the German Primate Center in Gttingen, Germany.

Pig-tailed langurs are medium-sized monkeys that spend most of their day sitting in trees in small groups eating leaves. Their close relatives on the mainland of Indonesia are prey for tigers and leopards, but on the Mentawai islands, the monkeys have been isolated from big cats for about half a million years.

Yorzinski played recordings of tiger and leopard calls and growls, as well as the sounds of elephants (another animal unknown to the monkeys), pigs and birds (animals they know, but which do not eat monkeys) and people talking in the local language. People do hunt the monkeys for food.

On hearing the noises, the monkeys would look around and at each other and might leave the area. They did not show any greater alarm at hearing big cat noises than at hearing an elephant, and would flee in about four to five seconds. But on hearing recorded human voices, the monkeys would flee within a second. They did not flee from bird or pig noises.

Yorzinski, of course, had to take care to stay out of sight when locating monkeys and setting up speakers. "We couldn't do the experiment if the monkeys saw us first," she said.


'/>"/>

Contact: Andy Fell
ahfell@ucdavis.edu
530-752-4533
University of California - Davis
Source:Eurekalert

Page: 1

Related biology news :

1. Ancient whale fall from Californias Ao Nuevo Island one of youngest, most complete known
2. Ancient whale fall from Californias Año Nuevo Island one of youngest, most complete known
3. Penn researchers find monkeys able to fend off AIDS-like symptoms with enhanced HIV vaccine
4. Humans and monkeys share Machiavellian intelligence
5. Influence of sex and handedness on brain is similar in capuchin monkeys and humans
6. Monkeys use baby talk to interact with infants
7. Internationally recognized experts presents a complete overview on hydroecology and ecohydrology
8. Relevance of rice research recognized
9. NIH recognizes Clemson nanotechnology for molecule tracking
10. Entomological Society of America recognizes 2007 fellows and honorary members
11. UNCCD recognizes importance of satellites for combating desertification
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... Apr. 11, 2017 Research and Markets has ... report to their offering. ... The global eye tracking market to grow at a CAGR of ... Eye Tracking Market 2017-2021, has been prepared based on an in-depth ... market landscape and its growth prospects over the coming years. The ...
(Date:4/5/2017)... NEW YORK , April 5, 2017 ... security, is announcing that the server component of the ... is known for providing the end-to-end security architecture that ... customers. HYPR has already secured over 15 ... system makers including manufacturers of connected home product suites ...
(Date:3/30/2017)... The research team of The Hong Kong Polytechnic University ... adopting ground breaking 3D fingerprint minutiae recovery and matching technology, pushing ... for use in identification, crime investigation, immigration control, security of access ... ... A research team led by Dr Ajay ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... They call ... complex biological network, a depiction of a system of linkages and connections so ... PhD, associate professor of computer science at Worcester Polytechnic Institute (WPI) and director ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... a United States multicenter, prospective clinical study that demonstrates the accuracy of ... capable of identifying clinically significant acute bacterial and viral respiratory tract infections ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... genomics analysis platform specifically designed for life science researchers to analyze and ... researcher Rosalind Franklin, who made a major contribution to the discovery of ...
(Date:10/11/2017)... ... 2017 , ... Personal eye wash is a basic first aid supply for any work environment, ... eye do you rinse first if a dangerous substance enters both eyes? It’s one less ... with its unique dual eye piece. , “Whether its dirt and debris, or an acid ...
Breaking Biology Technology: