Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Multiple paternity may offer fewer advantages than previously thought


Females can enhance the survival chances of their offspring by mating with multiple males. When it comes to immunological benefits, however, female promiscuity may not provide the young the advantages long suspected, as a research team from Vetmeduni Vienna confirmed. The researchers also provided the first evidence that females are much more susceptible to Salmonella infection than males. The study was published in the Journal of Evolutionary Biology.

Promiscuity is common among females in the animal kingdom. Mating with multiple males can increase genetic diversity and enhance the survival of the offspring. When given a choice, female house mice mate with multiple males. “The females select their partner on the basis of their scent markings. These chemical signals provide a surprising amount of information about possible partners, including their health and disease resistance,” explains Kerstin Thonhauser of the Konrad Lorenz Institute for Ethology at Vetmeduni Vienna.

Multiple paternity is no advanatge for the offspring of mice in the case of an infection with Salmonella.

Kerstin Thonhauser/Vetmeduni Vienna

The team of researchers led by Dustin Penn explored the previously unanswered question whether polyandry in house mice also offered an advantage in terms of immune resistance. The researchers challenged animals from single- and multiple-sired litters with two different strains of Salmonella: a primary infection, which was harmless, and effectively a vaccine, and then a secondary infection. Prior to the study, there had been little sex-specific data concerning the immune response to Salmonella infection, so the team also considered this question in their study.

Polyandry offered mice no advantages against Salmonella

In general, there was an enormous variation in the bacterial clearance among the mice, and especially among different families, but no difference was found between single- and multiple sired offspring. These results do not support the hypothesis that the increased genetic diversity of multiple-sired litters enhances immune resistance.

Male mice were surprisingly resistant

Among mice, males are usually more susceptible to infectious diseases, yet in the case of Salmonella, however, this proved not to be the case. The immune system of male mice handled this challenge better than the females, as was confirmed by the lower bacterial load among males. No other study to date has demonstrated such a sex-dependent response for Salmonella. Unfortunately, most studies on mice have focused on males, as a way to control for variation in female reproductive cycling, and so we understand little about sex differences. Such sex difference should be considered in future immunological research, says Thonhauser.

Time to reconsider hypotheses on multiple paternity

Nonetheless, Thonhauser and colleagues stress that female promiscuity could still provide immunological benefits for offspring by reducing disease transmission within litters. “There are additional factors to consider. It is possible that a multiple paternity protects litters against challenges from multiple pathogens. Our study was a first step towards testing these more complicated scenarios regarding the advantages of multiple paternity.”

The article “Does multiple paternity influence offspring disease resistance?” by Thonhauser K.E., Raveh S., Thoß M. and Penn D.J. was published in Journal of Evolutionary Biology. doi: 10.1111/jeb.12854

About the University of Veterinary Medicine, Vienna
The University of Veterinary Medicine, Vienna in Austria is one of the leading academic and research institutions in the field of Veterinary Sciences in Europe. About 1,300 employees and 2,300 students work on the campus in the north of Vienna which also houses five university clinics and various research sites. Outside of Vienna the university operates Teaching and Research Farms.

Scientific Contact:
Kerstin Thonhauser
Konrad Lorenz Institute of Ethology
University of Veterinary Medicine Vienna (Vetmeduni Vienna)
T +43 1 25077-7355

Released by:
Georg Mair
Science Communication / Corporate Communications
University of Veterinary Medicine Vienna (Vetmeduni Vienna)
T +43 1 25077-1165

Weitere Informationen:

Mag.rer.nat Georg Mair | Veterinärmedizinische Universität Wien

More articles from Life Sciences:

nachricht International team discovers novel Alzheimer's disease risk gene among Icelanders
24.10.2016 | Baylor College of Medicine

nachricht New bacteria groups, and stunning diversity, discovered underground
24.10.2016 | DOE/Lawrence Berkeley National Laboratory

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

New method increases energy density in lithium batteries

24.10.2016 | Power and Electrical Engineering

International team discovers novel Alzheimer's disease risk gene among Icelanders

24.10.2016 | Life Sciences

New bacteria groups, and stunning diversity, discovered underground

24.10.2016 | Life Sciences

More VideoLinks >>>