Featured Research

from universities, journals, and other organizations

Big Cats Need Cat Food: New Model Directly Links Tiger Numbers To Amount Of Prey, Study Says

Date:
March 25, 2004
Source:
Wildlife Conservation Society
Summary:
Scientists from the New York-based Wildlife Conservation Society (WCS) and their collaborators from the US Geological Survey's wildlife research center in Maryland have developed a model that shows a solid quantitative relationship between tiger numbers and the amount of prey available to these highly endangered big cats.

Scientists from the New York-based Wildlife Conservation Society (WCS) and their collaborators from the US Geological Survey's wildlife research center in Maryland have developed a model that shows a solid quantitative relationship between tiger numbers and the amount of prey available to these highly endangered big cats. Published in the latest edition of the Proceedings of the National Academy of Sciences, the model can not only accurately predict tiger density over a variety of habitats, but also help safeguard populations by pinpointing the causes of their decline.

The authors tested their model by sampling tiger and prey populations in 11 ecologically distinct sites in India – from grasslands to dry forests – over an eight-year period, with teams of biologists walking more than 4,200 miles to count prey animals, and setting hundreds of camera traps over 8,600 days of effort. Densities of ungulate prey such as deer, antelopes, wild cattle and wild pigs ranged from a low of 5.3 animals per square kilometer in Meghat Reserve, to more than 63 per square kilometer in Pench Reserve. The model predictions matched the measured tiger densities ranging between 3.2 to 16.8 tigers per 100 square kilometers.

According to WCS scientist Dr. Ullas Karanth, the lead author of the study, the rigorous methods and extensive field component of this study set it apart from most population ecology research, which is often carried out on smaller animals in laboratories.

"When it comes to macro-ecological studies on far-ranging landscape species like tigers and their prey, the biological, statistical and practical problems involved have proved too daunting in the past, compelling scientists to draw weak inferences, usually based on secondary data," said Dr. Karanth. "We tackled this problem head-on by immersing ourselves for eight years in the secret world of the tiger."

"Our results confirm that decline of wild tigers is primarily driven by prey-depletion caused by human hunters," Karanth added. "Conservationists should direct their concerns at reducing such negative human impacts." WCS's conservation efforts to save tigers in India and throughout their range are featured in "Tiger Mountain," a new exhibit that opened at the Bronx Zoo last May.


Story Source:

The above story is based on materials provided by Wildlife Conservation Society. Note: Materials may be edited for content and length.


Cite This Page:

Wildlife Conservation Society. "Big Cats Need Cat Food: New Model Directly Links Tiger Numbers To Amount Of Prey, Study Says." ScienceDaily. ScienceDaily, 25 March 2004. <www.sciencedaily.com/releases/2004/03/040323074249.htm>.
Wildlife Conservation Society. (2004, March 25). Big Cats Need Cat Food: New Model Directly Links Tiger Numbers To Amount Of Prey, Study Says. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/2004/03/040323074249.htm
Wildlife Conservation Society. "Big Cats Need Cat Food: New Model Directly Links Tiger Numbers To Amount Of Prey, Study Says." ScienceDaily. www.sciencedaily.com/releases/2004/03/040323074249.htm (accessed September 20, 2014).

Share This



More Plants & Animals News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins