Ready for mating at the right time: How pheromones signal mating cues in tilapia
Posted August 29, 2014
Fish rely on pheromones to trigger social responses and to coordinate reproductive behavior in males and females. Scientists have now identified such a signal molecule in the urine of male Mozambique tilapia: this pheromone boosts hormone production and accelerates oocyte maturation in reproductive females.
Flapping baby birds give clues to origin of flight
Posted August 28, 2014
The origin of flight is a contentious issue: some argue that tree-climbing dinosaurs learned to fly in order to avoid hard falls. Others favor the story that theropod dinosaurs ran along the ground and pumped their forelimbs to gain lift, eventually talking off. New evidence showing the early development of aerial righting in birds favors the tree-dweller hypothesis.