Beetles that demonstrate same-sex sexual behaviour may be asserting dominance over rival males without having to resort to fighting, a new study has shown.
Plants & Animals
Mar 3, 2016
0
194
Indiana University researchers have discovered a hormonal mechanism in hamsters that connects short winter days with increased aggression in females, and that it differs from the mechanism that controls this same response ...
Plants & Animals
Nov 18, 2015
0
1069
Biologists have unlocked new insights into the mysterious evolution of colour diversity among fish, and how aggression from other species plays a part in patterns of colour diversity observed in the wild.
Plants & Animals
Oct 5, 2015
0
29
A study of aggression in monk parakeets suggests that where they stand in the pecking order is a function of the bird's carefully calibrated perceptions of the rank of their fellow-feathered friends.
Plants & Animals
Sep 10, 2015
0
79
Why do animals fight with members of other species? A nine-year study by UCLA biologists says the reason often has to do with "obtaining priority access to females" in the area.
Plants & Animals
Apr 23, 2015
5
85
Dogs are regarded as more tolerant and less aggressive compared to their ancestors, the wolves. Researchers from the Messerli Research Institute at the Vetmeduni Vienna question this image. They show in a recent study that ...
Plants & Animals
Apr 21, 2015
8
1093
Nearly four decades of observations of Tanzanian chimpanzees has revealed that the mothers of sons are about 25 percent more social than the mothers of daughters. Boy moms were found to spend about two hours more per day ...
Plants & Animals
Nov 24, 2014
1
0
In a long-term study of interactions between chimpanzees in the famous Gombe National Park in Tanzania, researchers have found that males who consistently bully females tend to father more babies with their victims.
Plants & Animals
Nov 13, 2014
0
0
Man's nearest relatives kill each other in order to eliminate rivals and gain better access to territory, mates, food or other resources—not because human activities have made them more aggressive.
Evolution
Sep 17, 2014
2
0
Scientists report they can crank up insect aggression simply by interfering with a basic metabolic pathway in the insect brain. Their study, of fruit flies and honey bees, shows a direct, causal link between brain metabolism ...
Plants & Animals
Aug 5, 2014
1
0
