Navigation Links
Individuals vary their immune response according to age, sex and the costs
Date:9/10/2008

Is it always good to respond maximally when pathogens or disease strike, or should individuals vary their immune response to balance immediate and future costs? This is the question evolutionary physiologists Oliver Love, Katrina Salvante, James Dale, and Tony Williams asked when they examined how a simple immune response varied at different life stages across the life-span of individual zebra finches (Taeniopygia guttata), in a study published in the September issue of the American Naturalist.

When transitioning from nest-bound juveniles to adults, female immune responses matured slowly whereas males showed dramatic variation potentially due to the costs of molting into their colorful sexually dimorphic plumage. Adult males showed little variation in immune response despite changes in resource quality. Likewise, when females laid eggs under high-quality resource conditions, immune responses were also consistent with those during non-breeding and similar to male responses. However, when laying on reduced resources females reduced their immune response and their reproductive output consistent with a facultative (resource-driven) effect of reproductive effort on immunity. Moreover, even under high-resource conditions during the chick-rearing stage mothers showed reduced immune responses compared to fathers suggesting a residual energetic cost of egg-laying. Perhaps most importantly, immune responses of juveniles of both sexes did not predict their subsequent adult responses. Immune responses of adult females were only predictable when the quality of the environment remained constant; as soon as conditions deteriorated, individual females required flexibility in both the immune and reproductive systems. However, the degree of flexibility came at a cost as only individuals with high immune responses as non-breeders had the capacity to reduce responses when times became tough. These results underlie the fact that immunity is a highly plastic trait that can be modulated in a sex- and context-dependent manner. Given the need for individual flexibility in the immune system, this suggests that an immune response at one stage may provide limited information about immune response at future stages.


'/>"/>

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

Related biology news :

1. Caltech neurobiologists discover individuals who hear movement
2. Jingle bells not merry for tone-deaf individuals
3. How plants fine tune their natural chemical defenses
4. Old before their time? Aging in flies under natural vs. laboratory conditions
5. Codeine not safe for all breastfeeding moms and their babies
6. Parents shape whether their children learn to eat fruits and vegetables
7. Guilt on their hands: tiny tags could help to solve and deter gun crime
8. Male fish deceive rivals about their top mate choice
9. Syracuse University scientists discover how some bacteria may steal iron from their human hosts
10. Ultrasonic frogs can tune their ears to different frequencies
11. Pregnant mice block out unwelcome admirers to protect their pups
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Individuals vary their immune response according to age, sex and the costs
(Date:2/11/2016)... , Feb. 11, 2016  Vigilant Solutions announces today ... data are being used by Lee,s Summit ... the recent location and arrest of a homicide suspect. ... covers around 65 square miles and is home ... Police Department has a single mobile license plate reader system ...
(Date:2/8/2016)... 2016 Worldcore is ... innovation for clients, comfort and unbeatable security, with ... --> Worldcore is the first EU-regulated ... comfort and unbeatable security, with a Voice Biometrics ... Worldcore is the first EU-regulated global payment ...
(Date:2/3/2016)... PUNE, India , February 3, 2016 ... to the new market research report "Automated Fingerprint Identification ... (Tenprint Search, Latent Search), Application (Banking & Finance, Government, ... 2020", published by MarketsandMarkets, the market is expected to ... estimated CAGR of 21.0% between 2015 and 2020. The ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... ... February 11, 2016 , ... Global ... new agreement with Bankok,Thailand-based Global Stem Cells Network (GSCN) to distribute exosome injection ... American countries, including Mexico, Costa Rica, Dominican Republic, Colombia, Argentina, Nicaragua, Panama, El ...
(Date:2/10/2016)... -- NX Prenatal Inc., a US based molecular ... early warning of adverse pregnancy outcomes, announced today ... Dr. Thomas McElrath of Brigham & ... (SMFM) annual meeting held in Atlanta ... presentation reported initial positive top-line results regarding the ...
(Date:2/10/2016)... , Feb. 10, 2016  Matchbook, Inc., a ... fast growing biotech companies, announced today the appointment ... Strategic Advisor. Jim brings nearly 25 years of ... procurement, having spent nearly two decades in executive ... and Procurement at Genzyme and, most recently headed ...
(Date:2/10/2016)... ... 10, 2016 , ... PatientCrossroads announces that the ... online PatientCrossroads platform, has exceeded both its one-year and overall recruitment goals since ... which seeks to advance understanding of the hereditary risks for certain kinds of ...
Breaking Biology Technology: