When yellow jackets sense an intruder, they emit chemical signals known as alarm pheromones that rouse colony members into defense mode and mark intrduders for attack.
Captured damselfish release a chemical distress call that confuses their attackers by calling other predators to the area. The ensuing competition buys them enough time to flee.
A recent study looked at the behavior between queens and workers in one bumblebee species, finding tha a single system of pheromones doesn't control behavior across several species, as previously thought.
University of New Hampshire researchers have discovered they can use the chemical signatures found in the inner ear bones of winter flounder to help them trace the fish to their estuaries – a critical part of remedying their population decline.
The same time every year, some people across the globe suddenly find themselves severely depressed. This is called seasonal affective disorder (SAD) and it has left professionals scratching their heads for years. Now a team of researchers have discovered that SAD could be caused by increased levels of the serotonin transporter protein.