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12 December 2013 1:00 pm ,
Vol. 342 ,
The iconic 125-year-old Lick Observatory on Mount Hamilton near San Jose, California, is facing the threat of closure...
Recent results from the Curiosity Mars rover have helped scientists formulate a plan for the next phase of its mission...
A new, remarkably powerful drug that cripples the hepatitis C virus (HCV) came to market last week, but it sells for $...
In pretoothbrush populations, gumlines would often be marred by a thick, visible crust of calcium phosphate, food...
Evolutionary biologists have long studied how the Mexican tetra, a drab fish that lives in rivers and creeks but has...
Victorian astronomers spent countless hours laboriously charting the positions of stars in the sky. Such sky mapping,...
In an ambitious project to study 1000 years of sickness and health, researchers are excavating the graveyard of the now...
Stefan Behnisch has won awards for designing science labs and other buildings that are smart, sustainable, and...
- 12 December 2013 1:00 pm , Vol. 342 , #6164
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Video: Crayfish Urine Sparks a Lover's Tiff
29 March 2010 7:00 pm
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Credit: Fiona C Berry and Thomas Breithaupt, University of Hull, U.K.
Strange courting rituals run rampant throughout the animal kingdom, but female signal crayfish (Pacifastacus leniusculus) may take rank for their cruel mind games. Videos of the fish reveal that females release pheromones in their urine to attract suitors but that when a male arrives, she fights him. The authors, reporting today in BMC Biology, suggest the females may use these unconventional tactics to access the strongest and most fit mates. Those males who are rough and tumble enough to overcome the feisty females win access to her eggs.