Navigation Links
Old before their time? Aging in flies under natural vs. laboratory conditions
Date:9/5/2008

Evolutionary studies of aging typically utilize small, short-lived animals (insects, worms, mice) under benign conditions constant temperature and humidity, no parasites, superabundant food in the laboratory. Oddly enough, very little is known about aging in such animals in their harsh, stressful natural environments. Could it be that these laboratory "guinea pigs" actually age much more slowly in captive luxury than do their wild cousins?

Nori Kawasaki, Rob Brooks, and Russell Bonduriansky of the University of New South Wales, and Chad Brassil of the University of Nebraska, set out to find out, using the giant Australian stilt-legged fly Telostylinus angusticollis, a beautiful, sexually dimorphic animal that breeds on rotten wood. To identify individual flies in the wild, they wrote codes (combinations of Arabic numerals and Latin and Japanese letters) on the flies' backs using enamel paint, and recorded the comings and goings of marked individuals on Acacia trunks while simultaneously monitoring their captive cousins in the lab.

Analysis, published in the September issue of the American Naturalist, revealed striking contrasts between wild and captivity: in males, the rate of aging (measured as the rate of increase of mortality rate with age) was as least two-fold greater in the wild than in the laboratory. Curiously, wild females did not seem to age at all. For both sexes, life expectancies in the wild were dramatically shorter than in the lab.

Evolutionary biologists have long sought to understand how environmental factors generate natural selection on the rate of aging, and ultimately influence the frequencies of genes that underpin genetic variation in this trait. Much less is known about how environment affects the expression of genes that modulate aging rate. Kawasaki et al. have shown that animals can age much faster in their stressful natural environments than in the benign conditions of the laboratory. Their results suggest that laboratory estimates of aging and lifespan (and, therefore, fitness) should be interpreted with considerable caution.


'/>"/>

Contact: Patricia Morse
pmorse@uchicago.edu
773-702-0446
University of Chicago Press Journals
Source:Eurekalert  

Related biology news :

1. Rare Antarctic fossils reveal extinction of tundra before full polar climate arrived
2. Obese men have less semen, more sperm abnormalities, and should lose weight before trying for a baby
3. To fight the cancer before the tumor grows
4. SHRM CEO Testifies Before House Subcommittee on Social Security
5. Breast cancers behave differently before and after the age of 70
6. War between the sexes begins before twins birth, TAU researchers say
7. Deadly genetic disease prevented before birth in zebrafish
8. ASU researcher may have discovered key to life before its origin on Earth
9. Generalist bacteria discovered in coastal waters may be more flexible than known before
10. Breast cancer cells have to learn to walk before they can run
11. Laser can spot illness before symptoms appear
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Old before their time? Aging in flies under natural vs. laboratory conditions
(Date:4/24/2017)... WASHINGTON , April 24, 2017 ... counsel and partner with  Identity Strategy Partners, LLP ... "With or without President Trump,s March 6, ... Foreign Terrorist Entry , refugee vetting can be instilled ... refugee resettlement. (Right now, all refugee applications are ...
(Date:4/13/2017)... 2017 According to a new market research report ... Identity Administration, and Authorization), Service, Authentication Type, Deployment Mode, Vertical, and Region ... expected to grow from USD 14.30 Billion in 2017 to USD 31.75 ... ... MarketsandMarkets Logo ...
(Date:4/6/2017)... Forecasts by Product Type (EAC), ... End-Use (Transportation & Logistics, Government & Public Sector, Utilities ... Generation Facility, Nuclear Power), Industrial, Retail, Business Organisation (BFSI), ... you looking for a definitive report on the $27.9bn ... ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... 2017 , ... NetDimensions has been ranked as a Leader ... Corporate Learning, 2017. , Aragon Research defines Leaders as organizations who possess comprehensive ... those strategies. NetDimensionsā€™ ranking as a Leader due to its strengths in: , ...
(Date:5/23/2017)... Diego, CA (PRWEB) , ... May 23, 2017 , ... ... matrix of polymeric molecules, can cause diverse pathologies ranging from food poisoning and catheter ... impact of biofilms is in the tens of billions of dollars per year, there ...
(Date:5/22/2017)... ... 22, 2017 , ... Cancer diagnostics and pathology workflow solution ... the Association for Pathology Informatics Annual Summit at the Wyndham Grand ... Cancer Diagnostic Cockpit and Consultation Portal, Inspirata will present research it led to ...
(Date:5/18/2017)... ... May 18, 2017 , ... Dr. Ralph Mobbs ... the Prince Of Wales Private Hospital. The procedure was performed on a 46-year-old ... failed conservative treatments prior to undergoing surgery. , The AxioMed viscoelastic disc is ...
Breaking Biology Technology: