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:11/6/2014)... Baltimore, MD, November 6, 2014 - Insilico Medicine, ... in aging and age related diseases announced a ... medicine of cancer, Champions Oncology, Inc (OTC: CSBR). ... genomics for personalized medicine, but Champions Oncology,s TumorGraft ... can validate the chemotherapy regimen experimentally generating vast ...
(Date:11/5/2014)... career to understanding the Earth,s climate and communicating ... deputy director and regional climatologist for the Western ... Redmond has more than three decades of experience ... data to the general public. , At its ... December 15-19, 2014 the American Geophysical Union (AGU) ...
(Date:11/4/2014)... University of Utah engineers developed the first room-temperature fuel ... electricity without needing to ignite the fuel. These new ... off-grid power and sensors. , A study of the ... Society journal ACS Catalysis . , Fuel cells ... a fuel and an oxygen-rich source such as air. ...
Breaking Biology News(10 mins):Insilico Medicine, Inc announces research collaboration with Champions Oncology, Inc 2Nevada climatologist to be honored at AGU Fall Meeting for lifetime of public outreach 2Jet-fueled electricity at room temperature 2
... Riverside-led team of biomedical scientists has found that a readily ... skin infections, can be used to treat Fragile X ... and the most common cause of autism. The study,s ... a new clinical trial in Toronto, Canada, that will test ...
... species, filling such an important niche in ocean communities ... finding, however, that sea otters can have even farther-reaching ... behavior of another top predator: the bald eagle. ... heights of 250 feet and function much like trees ...
... of the Union Address on January 23, 2007, President Bush ... "We must increase the supply of alternative fuels, by setting ... renewable and alternative fuels in 2017." This mandate ... 2008 Farm Bill and a $45 subsidy per ton of ...
Cached Biology News:UCR researchers propose minocycline as a promising drug for patients with Fragile X syndrome 2UCR researchers propose minocycline as a promising drug for patients with Fragile X syndrome 3Decline in Alaskan sea otters affects bald eagles' diet 2Decline in Alaskan sea otters affects bald eagles' diet 3Mandate for biofuels production requires science-based policy and global perspective 2
(Date:11/18/2014)... 2014 RPS Diagnostics (RPS®) – ... today announces its third annual partnership of the ... Smart About Antibiotics Week from November 17-23. , ... campaign designed to highlight the coordinated efforts of ... and for-profit partners to provide education about the ...
(Date:11/18/2014)... (PRWEB) November 18, 2014 American ... Australia) recently formed a partnership with researchers at ... University of Technology, and the USDA’s Forest Products ... reinforced with nanocellulose. Nanocellulose is a rapidly emerging ... of the project is to replace heavy steel ...
(Date:11/18/2014)... 18, 2014  Asterias Biotherapeutics, Inc. (NYSE MKT: ... field of regenerative medicine, today announced that the ... for complete cervical spinal cord injury (SCI), has ... Therapies Projects to Watch" by Elsevier Business Intelligence. ... significant industry honor, which represents independent validation of ...
(Date:11/16/2014)... November 17, 2014 The “Fluid ... the fluid visualization systems market with an analysis ... suction & irrigation, dialyzes, fluid warming and waste ... of the fluid visualization systems by applications and ... The market was valued at $19,285.5 million in ...
Breaking Biology Technology:RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 2RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 3American Process Inc. Announces Partnership to Develop Ultra-Strong, Lightweight Automotive Components Using Nanotechnology from Nature 2American Process Inc. Announces Partnership to Develop Ultra-Strong, Lightweight Automotive Components Using Nanotechnology from Nature 3Asterias Biotherapeutics Named as a "Top Advanced Therapies Projects to Watch" and Will Present at the Therapeutic Area Partnerships Conference 2Asterias Biotherapeutics Named as a "Top Advanced Therapies Projects to Watch" and Will Present at the Therapeutic Area Partnerships Conference 3Fluid Visualization Systems Market poised to reach $25,908.4 Million by 2018 - New Research Report by MarketsandMarkets 2Fluid Visualization Systems Market poised to reach $25,908.4 Million by 2018 - New Research Report by MarketsandMarkets 3Fluid Visualization Systems Market poised to reach $25,908.4 Million by 2018 - New Research Report by MarketsandMarkets 4
... Scholarship Award to Middletown High School SophomoreBRISTOL, R.I., March ... commitment of encouraging young women to pursue careers in ... announced a full-scholarship award for one participant during the ... Mersina Simanski, sophomore at Middletown High School, was presented ...
... with Major Biopharmaceutical CompanyBELGIUM, Wis., March 6 ... to announce that its subsidiary, Modular Process Constructors ... to better reflect its vision, and announces that ... major global biopharmaceutical and consumer health company. The ...
... is available in French . , Montreal ... which includes Dr. Irma Lopez from the Research Institute of ... role in the international collaboration that led to the discovery ... and retinitis pigmentosa (RP), two devastating forms of childhood blindness. ...
Cached Biology Technology:GRRL Tech Participant Offered Full Tuition Four-Year Scholarship to Roger Williams University 2GRRL Tech Participant Offered Full Tuition Four-Year Scholarship to Roger Williams University 3Mach One Subsidiary Modular Process Constructors LLC Changes Name to MPS BioPharm to Better Reflect its Vision 2Discovery of a new retinal gene involved in childhood blindness 2
Glucagon-like peptide-1 (GLP-1 (1-36) amide)...
Complement factor B (human)...
... JNK (c-Jun NH2-terminal kinase) signal transduction ... MAP kinase pathways in mammals. JNK ... environmental stress, is associated with the ... is implicated in the immune response, ...
... mid-, near- and far-infrared range FT-IR spectrometers ... in their class. Yet all this comes ... Highest-energy throughput: Having a larger and ... to other conventional FT-IRs provides 300%,larger solid ...
Biology Products: