Navigation Links
Evolving to fight epidemics: Weakness can be an advantage
Date:3/30/2012

an Duffy, a biologist at Georgia Tech.

"There is a trade-off between resistance and reproduction because any resources an animal devotes to defense are not available for reproduction. When ecological factors favor small epidemics, it is better for hosts to invest in reproduction rather than defense."

In addition to Duffy, also contributing to this study are Indiana University biologists Spencer Hall and David Civitello; Christopher Klausmeier, a plant biologist at Michigan State University; and Georgia Tech researchers Jessica Housley Ochs and Rachel Penczykowski.

For the study, the researchers monitored the levels of nutritional resources, predation and parasitic infection in seven Indiana lakes on a weekly basis for a period of four months.

They calculated infection prevalence on live hosts using established survey methods, estimated resources by measuring the levels of phosphorus and nitrogen in the water, and assessed predation by measuring the size of uninfected adult Daphnia.

The researchers also conducted infection assays in the laboratory on Daphnia collected from each of the seven lake populations at two time points: in late July before epidemics began and in mid-November as epidemics waned

The assays measured the zooplankton's uptake of Metschnikowia bicuspidata and the infectivity of the yeast once consumed.

The infection assays showed a significant evolutionary response of Daphnia to epidemics in six of the seven lake populations.

The Daphnia population became significantly more resistant to infection in three lakes and significantly more susceptible to infection in three other lakes.

The hosts in the seventh lake did not show a significant change in susceptibility, but trended toward increased resistance.

In the six lake populations that showed an evolutionary response, epidemics were larger when lakes had lower predation and hig
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Cheskin Added Value EVP Lee Shupp Discusses Evolving Dynamics of Consumers and Imaging Tech at 6Sight
2. Quickly evolving bacteria could improve digestive health
3. Beyond Darwin: Evolving new functions
4. Reports highlight the evolving role of clinical microbiology laboratories
5. Fast-evolving genes control developmental differences in social insects
6. British butterfly is evolving to respond to climate change
7. Vitiligo skin disorder could yield clues in fight against melanoma
8. Plant-eating predator to fight superweed is not magic bullet
9. UCSB study finds physical strength, fighting ability revealed in human faces
10. Scripps Florida scientists awarded $1.5M to fight major water and food parasites
11. A new weapon in the fight against obesity and diabetes
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Evolving to fight epidemics: Weakness can be an advantage
(Date:11/3/2014)... that low birth weight and preterm birth are linked ... adulthood. Findings published in the American College of Rheumatology ... that low birth weight and pre-term babies were not ... as adults. , According to the ACR, 27 ... with clinical OA. Symptoms of OA range from mild ...
(Date:11/2/2014)... (2 November 2014)—In support of a bold quest to ... Melinda Gates Foundation today announced an award of US$156 ... Initiative (MVI) in building new vaccines that will interrupt ... the "accelerating to zero" agenda. Such vaccines would ensure ... be called an "immunological bed net." , This ...
(Date:11/2/2014)... Feynman walk into a bar and bump into a biologist ... setup to some late-night nerd sketch, researchers have taken this ... modern biology, namely, finding meaning in the rising oceans of ... of cancer mutations that genome-wide studies are publishing at a ... to parse the signal from the noise (and there is ...
Breaking Biology News(10 mins):Preterm, low birth-weight babies may need new hips in adulthood 2New malaria vaccines to prevent infection and block transmission get a shot in the arm 2New malaria vaccines to prevent infection and block transmission get a shot in the arm 3New malaria vaccines to prevent infection and block transmission get a shot in the arm 4Mutant models 2Mutant models 3Mutant models 4
... University evolutionary biologists David Queller and Joan Strassmann argue in ... components, from the genetic level on up, give a living ... plant, a bacteria or a colony. Some of ... individuality or even membership in the same species, may not ...
... Genencor, a division of Danisco, has won the ... of Chemical Engineers (AIChE) for its Accellerase® family ... Chair of the AIChE Awards committee, presented the ... Biomass Enzymes and Accellerase® Product Manager, and Aaron ...
... A nutritionist whose research was instrumental in adding fruits ... food subsidy will receive the March of Dimes Agnes Higgins ... Gail Harrison, Ph.D., MNS, , a professor ... of California, Los Angeles School of Public Health, will receive ...
Cached Biology News:What is the meaning of 'one'? 2What is the meaning of 'one'? 3Genencor Wins The American Institute of Chemical Engineers (AIChE) Sustainable Energy Award For Accellerase(R) Cellulosic Ethanol Enzymes 2March of Dimes honors Dr. Gail Harrison for outstanding work in maternal-fetal nutrition 2
(Date:11/26/2014)... November 26, 2014 The ETC ... award-winning technology innovation centers, announced today that applications ... on December 1st. “Do you have a big ... I want to know about it. AccelerateBaltimore helps ... to product in just 13 weeks.” Interested ...
(Date:11/26/2014)... Continuing its award-winning streak, Nerium International, the ... Awards for outstanding creative achievement by its marketing and ... the organization’s top honor, in the Branding category for ... April of this year. The event showcased top speakers ... was awarded a Gold MarCom Award in the Special ...
(Date:11/26/2014)... N.J. and WILMINGTON, DE (PRWEB) November 26, 2014 ... 2nd Annual MPN Heroes recognition reception on December 5, ... of Hematology’s annual meeting. The MPN Heroes event will ... contributions in the field of myeloproliferative neoplasms (MPNs). ... show "Nashville," will discuss his family's cancer journey at ...
(Date:11/26/2014)... N.J. , Nov. 25, 2014  Roka Bioscience, Inc. ... on providing advanced testing solutions for the detection of foodborne ... present at the Piper Jaffray  26 th Annual Healthcare ... will be held at The New York Palace in ... this presentation, material information concerning the Company, its operations, strategies ...
Breaking Biology Technology:AccelerateBaltimore Applications to Close in 6 Days 2AccelerateBaltimore Applications to Close in 6 Days 3Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2CURE Magazine and Incyte to Honor MPN Heroes 2CURE Magazine and Incyte to Honor MPN Heroes 3CURE Magazine and Incyte to Honor MPN Heroes 4Roka Bioscience to Present at the Piper Jaffray Healthcare Conference 2
... ARLINGTON, VA., July 30 Champions,Biotechnology, Inc. (OTC ... of advanced preclinical platforms and tumor specific data ... its financial results,for the fiscal year ended April ... are available in the Company,s Form 10-KSB available ...
... semiconductor manufacturers, officially putting revenue on the company,s books. ... ... 2008 -- Carbon Nanoprobes, Inc ( www.cnprobes.com [CN Probes™]), ... two major semiconductor manufacturers. Contracts with major semiconductor companies are ...
... DIEGO, July 29 Arena Pharmaceuticals,Inc. (Nasdaq: ... quarter 2008,financial results after the NASDAQ Global Market ... Jack Lief, Arena,s President and Chief,Executive Officer, and ... Financial Officer, will host a conference call at ...
Cached Biology Technology:Champions Biotechnology Reports Fiscal 2008 Full-Year Financial Results 2Champions Biotechnology Reports Fiscal 2008 Full-Year Financial Results 3Champions Biotechnology Reports Fiscal 2008 Full-Year Financial Results 4Startup Nanotech Firm Books First Revenue From Large Chip Makers 2Startup Nanotech Firm Books First Revenue From Large Chip Makers 3Arena Pharmaceuticals to Report Second Quarter 2008 Financial Results and to Host Conference Call and Webcast on Tuesday, August 5, 2008 2Arena Pharmaceuticals to Report Second Quarter 2008 Financial Results and to Host Conference Call and Webcast on Tuesday, August 5, 2008 3
... The Fluorescence Test Plate consists of ... format, with Inert Organic Fluorescent Compounds embedded ... be used on BioTeks FLx800 and Synergy ... ideal for GLP compliance while reducing the ...
... Gel Stain combo offers these benefits: ... separately Offers a safer ... Eliminates risks to yourself, the environment and ... 100 bp to >30 kb. UltraPure Agarose is a ...
... chemical suppression and thermally stabilized digital conductivity ... of common anions and cations over broad ... equilibrate, and fully automated with Chromeleon® SE ... maximum sample throughput at minimum cost. ...
... and SYBR Safe DNA Gel Stain combo offers these ... buying these same products separately ... bromide Eliminates risks to ... and RNA fragments from 100 bp to >30 kb. ...
Biology Products: