Opposites may attract, but they aren't better parents

Feb 01, 2011
A zebra finch. Picture by Peripitus

(PhysOrg.com) -- A study by experts at the University of Exeter has revealed that couples with similar personalities make much better parents than those with different dispositions – at least in the world of zebra finches.

Researchers found birds expressing strong personality traits, such as aggressive behaviour or a willingness to explore, did a much better job of raising young if they had a like-minded partner.

Where couples were markedly different in personality, chicks didn’t fare as well – being less well-fed and in poorer condition.

The research paper, published in the journal Animal Behaviour, isn’t able to give a definitive reason for the parenting benefits of matched personalities – but authors say it could be down to improved cooperation and coordination of effort.

Dr Sasha Dall, an author of the study and part of the University of Exeter’s Centre for Ecology and Conservation, said: “The personality differences we focused on with these birds reflected how they go about their daily lives.

“In the case of , to be good you need to be able to coordinate your behaviour so that while one parent is searching for food, the other is feeding the chick. It’s a lot easier to co-ordinate your behaviour if you’re similar in the way you go about things.”

For the study, researchers focused in on the ‘personalities’ of a group of zebra finches. They were able to establish that some showed consistent patterns of behaviour, normally either reflected in different levels of aggressiveness or willingness to explore. Often the traits were combined, but some finches didn’t demonstrate them at all.

Then couples were artificially paired together – with a selection of couples who were like-minded and some who had no common traits. When mated, eggs were swapped between nests in order to distinguish the advantages of genetic, as opposed to the behavioural compatibility of parents.

Experts then studied the animals while they were feeding their chicks, and monitored the progress of hatchlings to see which were doing the best job as parents.

Dr Nick Royle, an author of the study from the University of Exeter’s Centre for Environment and Ecology, said: “We found that if birds were highly exploratory and their partners shared that trait, their offspring were in really good condition. It was the same for highly aggressive birds. If only one parent showed the trait, the chicks fared less well.

“Our study ruled out the idea that this was due to genetic compatibility, so this could only be due to the behavioural compatibility of the individuals while they were raising offspring.”

The full paper, Pairs of zebra finches with similar ‘’ make better parents, is available to view online in Animal Behaviour.

Explore further: Bees able to spot which flowers offer best rewards before landing

More information: Pairs of zebra finches with similar ‘personalities’ make better parents, Animal Behaviour, doi:10.1016/j.anbehav.2010.12.006

Related Stories

Studies suggest males have more personality

Nov 18, 2009

(PhysOrg.com) -- Males have more pronounced personalities than females across a range of species - from humans to house sparrows - according to new research. Consistent personality traits, such as aggression ...

'Nervous' birds take more risks

Oct 26, 2007

Scientists have shown that birds with higher stress levels adopt bolder behaviour than their normally more relaxed peers in stressful situations. A University of Exeter research team studied zebra finches, which had been ...

Cuckoo chicks in Zebra finches

Apr 22, 2010

(PhysOrg.com) -- Some female zebra finches foist a part of their eggs on their neighbours. Scientists of the Max Planck Institute for Ornithology in Seewiesen discovered that in every fifth nest there is one ...

Modern society made up of all types

Nov 04, 2010

Modern society has an intense interest in classifying people into ‘types’, according to a University of Melbourne Cultural Historian, leading to potentially catastrophic life-changing outcomes for those typed – ...

Cuckoos evolve to fool angry birds

Jan 12, 2011

(PhysOrg.com) -- Australian cuckoo birds have taken a new evolutionary step – mimicking the color of their host young to avoid certain death, according to a study by researchers from The Australian National ...

Recommended for you

Why do snakes flick their tongues?

12 hours ago

Many people think a snake's forked tongue is creepy. Every so often, the snake waves it around rapidly, then retracts it. Theories explaining the forked tongues of snakes have been around for thousands of ...

User comments : 0