Researchers assessed the behaviour of rats born with different numbers of siblings, a variable that has rarely been taken into account until now. The group contained rats from litters with less than ten pups, litters with ten to fifteen pups and litters with more than fifteen pups.
The mother's behaviour towards her pups was also studied to discover whether this influenced any emotional changes appearing in their adult life. The results of this experiment demonstrated that rats born from larger litters display less anxiety in adulthood, are more willing to explore new surroundings and react better to adverse or stressful situations when compared to the ones born and raised in smaller litters.
Previous studies revealed that rats receiving more maternal affection and attention present less anxiety when they are adults. In this sense, the present research demonstrates that in addition to the mother's care, relationships between siblings also have a significant impact on how rats behave later on in life.
According to the authors of the research, “The first years of life are very important for the development of our nervous system and for how we behave when we are adults”. Although the research was carried out with an animal model, “it is a very useful model in studying the effect early life experiences have on adult behaviour”.
The study, directed by Universitat Autònoma de Barcelona Institute of Neuroscience researchers Roser Nadal and Rosa Maria Escorihuela, was published in the journal Physiology & Behavior.
Octavi López Coronado | alfa
Geographers provide new insight into commuter megaregions of the US
01.12.2016 | Dartmouth College
Sustainable Development Goals lead to lower population growth
30.11.2016 | International Institute for Applied Systems Analysis (IIASA)
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy