ÌÇĐÄÍűÒł°æ

Home

Human pharmaceuticals change cricket personality

14 November 2018

Karin Söderlund Leifler and Anna Nilsen

Why do animals differ in personality? Researchers at LiU used human drugs that alter two brain chemicals, serotonin and dopamine, to see if these drugs would change the behavior of animals. Take a closer look at the crickets used in the study, in the video below.

Individuals in many animal species show different personality types. Some individuals are for example consistently bolder than others.Robin Abbey-Lee, postdoktor (stillbild frÄn video).Robin Abbey-Lee, postdoctoral researcher (photo from video).

“However, in biology, we still do not fully understand what causes people or animals to show differences in personality. In humans, people with different levels of brain chemicals, such as serotonin and dopamine, often behave differently. However, we do not know if these chemicals can explain personality differences also in other species, and if the chemicals are causing the observed differences or if both the differences in behavior and chemical levels are caused by another underlying factor”, says Robin Abbey-Lee, postdoctoral researcher at the Department of Physics, Chemistry and Biology, IFM, and lead author of the study.

The researchers, therefore, set out to experimentally change the levels of the brain chemicals serotonin and dopamine in the crickets. They did that by giving the crickets human pharmaceuticals that are known to act on the dopamine and serotonin systems and are used to treat Parkinson disease and depression, respectively.Hanne LĂžvlie Photo credit Anna Nilsen

“In this study we wanted to really address an important gap in our knowledge by experimentally altering these brain chemicals and seeing if we could get a resulting behavioral change”, says Hanne Lþvlie, associate professor at IFM, and senior author.

What the researchers found was that changing the serotonin levels made crickets less active and less aggressive. But changing the dopamine levels of crickets did not change their behavior.

“This suggest that serotonin has a clearer underlying role in these behaviors”, says Hanne Lþvlie.

These results both improve our understanding of why animals have personality, and also raise the issue of how increasing levels of pharmaceuticals leaking into nature through our waste water may affect animals.

The study is published in Scientific Reports.

The article: ””, Robin N Abbey-Lee, Emily J Uhrig, Laura Garnham, Kristoffer Lundgren, Sarah Child and Hanne Lþvlie, (2018), Scientific Reports, published online 1 November 2018, doi: 10.1038/s41598-018-34519-z

Video about the research

Why do animals differ in personality?

Are differences in personality linked to brain chemicals, such as serotonin and dopamine? Researchers at LiU used human drugs to see if they would change the behaviour of crickets.

Contact

Photo of Hanne LĂžvlie

Hanne Løvlie

Senior Associate Professor

Related research

A boy playing with a dog on the floor.

Playing with your dog creates a stronger bond

Playing a little extra with your dog improves the emotional bond between owner and dog, according to a study from LiU. However, training did not give the same results. The study is relevant for all dog owners, whether they have young or adult dogs.
Dolphin under the surface in a pool, with ECG logger.

Filipa Cunha Oliveira - Variation in heart rate according to dive depth in captive common bottlenose dolphins

Filipa monitors the heart rate of dolphins in her master's thesis at Applied Ethology and Animal Biology.
A woman with a big smile next to a loggerhead turtle.

Leonor Gomes Fernandes - How changes in magnetic fields affects the behavior and physiology of turtles

Leonor is one of the Master´s students at Applied Ethology and Animal Biology. Her research focuses on loggerhead turtles behaviour and physiology.

Latest news from LiU

kvinna som sitter ute pÄ campus valla.

Jeanne Cilliers is LiU’s Professor of Economic History

"Almost everything we experience today has historical parallels," says Jeanne Cilliers, new professor of economic history at LiU. She is interested in demographic processes such as marriage, fertility and mortality.
A man with glasses is looking at himself in the mirror.

Digital twin could reveal alcohol consumption in crime cases

Using a digital twin, it is possible to predict with greater precision than at present how much alcohol a person has consumed and at what time. The study was conducted by researchers at LiU and the Swedish National Board of Forensic Medicine.
Kvinna vid skrivbord med böcker.

New fuels may have an impact on the entire transport ecosystem

People, relationships and organisational culture can be decisive when new biofuels are introduced to the market. Switching to biogas affects entire networks of actors that are involved in freight transport in different ways.

Tags