In a study recently published in Behavioral Ecology, a team of C·I·B researchers showed that two important subtidal predators, rock lobsters and starfish, failed to resist invasions by invasive mussel prey.
Alien species are a common sight around the world. Yet, the diversity and ubiquity of these species belies the fact that many alien introductions fail to take hold.
The rates at which invasive species invade new areas are increasing now more than ever. As more invasive species are introduced around the globe, many invaders co-exist in the same areas.
C·I·B postdoctoral associate Dr. Natasha Mothapo used behavioural experiments to see if the African big-headed ant (Pheidole megacephala) can help to keep the spread of invasive Argentine ants (Linepithema humile) in check. Dr. Mothapo found that both species were very aggressive during fights. Their mortality rates were similar during one-on-one clashes, but Argentine ants suffered more deaths than did big-headed ants. When competing for food in the same environment, the African big-headed ant was able to keep Argentine ants from gaining access to the food.
