Navigation Links
Mice mothers devote energies to offspring when life is threatened
Date:5/28/2008

AMES, Iowa -- An Iowa State University researcher has found that sick female deer mice devote their energy to producing healthier offspring.

Lisa Schwanz, a researcher in the department of ecology, evolution and organismal biology, studied the size of offspring for both infected and healthy mice and found that females that had been infected with a parasite produced larger offspring than healthy females.

This finding was unexpected because most mammals tend to focus on their own survival when they are threatened with sickness or infection.

Schwanz's research findings have been published in New Scientist magazine.

She writes, "Organisms are predicted to decrease investment in current reproduction when parasitism has the greatest impact on current reproductive ability."

In other words, "infection in animals typically leads to responses that invest in the survival, not offspring," Schwanz said.

In deer mice, however, the opposite was happening.

In the study, Schwanz infected 30 female deer mice with a parasite that lowers the future reproductive ability and eventually kills the mice. By producing larger babies now, the mice are probably compensating for this loss in future reproduction, she said.

She also kept 21 deer mice healthy as a control.

After several weeks, all the mice were paired with mates. When the baby mice were born to both infected and healthy mothers, the offspring were tagged and weighed.

The results show that the offspring of the infected mothers were bigger. In deer mice, larger offspring are more likely to survive and reproduce.

"This shows there is a lot of diversity in the ways animals deal with infection," she said.

As the results of this study are not what she was expecting, and Schwanz feels that makes the results were noteworthy.

"It is really striking to find such strong results," she said.

The type of parasi
'/>"/>

Contact: Lisa Schwanz
schwanz@iastate.edu
617-990-7087
Iowa State University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Too much or too little weight gain poses risks to pregnant mothers, babies
2. Negligent, attentive mouse mothers show biological differences
3. Hungry mothers risk addiction in their adult children
4. Safer, more accurate radiation therapy for expecting mothers
5. Moms obesity during conception phase may set the stage for offsprings obesity risk
6. Species still have more viable offspring if they can choose their best mate
7. Over 50 percent of oceanic shark species threatened with extinction
8. Atmosphere threatened by pollutants entering ocean, prof says
9. Turtle nesting threatened by logging practices in Gabon, Smithsonian warns
10. Threatened bird species finds home at Western
11. Threatened birds may be rarer than geographic range maps suggest
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/31/2014)... the largest minority group in the United States, comprising ... are obese and are 1.2 times as likely to ... College of Nursing student researcher Lauren Gerchow, BSN, RN, ... contribute to this problem by compiling a systematic review ... Latina women recently published in Nursing Research . ...
(Date:7/31/2014)... study (HPV-023; NCT00518336) shows the sustained efficacy, ... virus (HPV) vaccine Cervarix. Women vaccinated with ... more than nine years, and vaccine efficacy ... is the longest follow-up report for a ... for the full paper. , HPV ...
(Date:7/31/2014)... team of scientists from Spain, France, and the ... that is the oldest definitive member of the ... amber. The discovery and description were made possible ... synchrotron imaging technique, which allows the detailed study ... new species is described in the journal ...
Breaking Biology News(10 mins):NYU research looks to combat US Latina immigrant obesity 2Sustained efficacy, immunogenicity, and safety for GlaxoSmithKline's HPV vaccine 2Sustained efficacy, immunogenicity, and safety for GlaxoSmithKline's HPV vaccine 3
... COLUMBUS , Ohio -- As sea levels rise, coastal communities ... water supplies than previously thought, according to a new study ... saltwater will intrude into fresh water aquifers, given the sea ... (IPCC). The IPCC has concluded that within the next 100 ...
... In a recent academic review, a University of Minnesota professor ... as opposed to specific nutrients, may be key to having ... practice in food industry and government, where marketers and regulators ... on specific vitamins and added supplements in food products, not ...
... produce lubricin, a thin film of protein found in ... friction in their joints, a new study led by ... friction and early wear in joints is a first; ... before. The finding, published in Arthritis & Rheumatism, sheds ...
Cached Biology News:Climate change could diminish drinking water more than expected 2Climate change could diminish drinking water more than expected 3Foods, not specific nutrients, may be key to good health 2First-ever study: lack of critical lubricant causes wear in joints 2
(Date:8/1/2014)... LA (PRWEB) August 01, 2014 Chantel Lee ... conduct research for 10 40-hour weeks with Dr. Juan Rodriguez, ... of diabetic retinopathy, a common diabetic eye disease caused by ... , "What Chantel and Eli accomplished is quite remarkable,” said ... only a concept when they started, and together carried it ...
(Date:8/1/2014)... As one of the 10 largest medical ... & Clinical Lab Expo is the place where breakthrough ... to the healthcare world. This year, many of the ... include the latest diagnostic technology in the field of ... biosensors have enabled the development of "labs-on-a-chip" that can ...
(Date:8/1/2014)... 1, 2014 Research and Markets ... Nucleotide Polymorphism (SNP) Genotyping and Analysis Market 2014-2018" ... http://photos.prnewswire.com/prnh/20130307/600769 Single Nucleotide Polymorphism (SNP) genotyping ... SNPs in the genome of various species. SNPs are ... and analysis technology can analyze thousands of SNPs and ...
(Date:8/1/2014)... August 01, 2014 Testing the ... to a better understanding embryonic development. How ... into structurally and functionally distinct tissues is important ... Prof. Todd McDevitt, Melissa Kinney, and Rabbia ... interact with biochemical cues to control many aspects ...
Breaking Biology Technology:Two Centenary College Students Tackle Diabetic Retinopathy Research 2Lab-on-a-Chip Technology to Be Featured at 2014 AACC Annual Meeting & Clinical Lab Expo 2Lab-on-a-Chip Technology to Be Featured at 2014 AACC Annual Meeting & Clinical Lab Expo 3Global Single Nucleotide Polymorphism (SNP) Genotyping and Analysis Market 2014-2018 2Study Links Biomechanics and Gene Expression in Stem Cells 2
... Oriental,Bioengineering, Inc. (NYSE: AOB ), a pharmaceutical ... and commercialization,of a broad range of prescription and ... the following statement regarding the earthquake in,China:, ... China,s earthquake and we,are thankful to report that ...
... EAST RUTHERFORD, N.J., May 15 Cambrex (NYSE:,CBM), a ... of,Directors appointed Steven M. Klosk, President and Chief Executive ... Directors effective May,14, 2008. James A. Mack, President and ... announced he will step down. The Company will,separate the ...
... PRINCETON, N.J., May 15 Derma Sciences, Inc.,(OTC ... results today for the first quarter ended March 31, ... the previous year, including sales,from the newly acquired First ... guidance, due primarily to higher than expected,integration costs associated ...
Cached Biology Technology:American Oriental Bioengineering Comments on Earthquake 2Cambrex Appoints Steven M. Klosk as President and CEO 2Derma Sciences Reports First Quarter 2008 Results 2Derma Sciences Reports First Quarter 2008 Results 3Derma Sciences Reports First Quarter 2008 Results 4Derma Sciences Reports First Quarter 2008 Results 5
Collected from animals that are 16 to 18 months old. Sterile, Cell culture tested, ID clarifier: USA Origin...
Contact us for more information...
Contact us for more information...
... are designed to rapidly and reliably ... our patented APA Technology. APAgene provides ... extraordinarily competitive price. All necessary ingredients ... Locator Kit can be used for ...
Biology Products: