- News Home
5 December 2013 11:26 am ,
Vol. 342 ,
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
- 5 December 2013 11:26 am , Vol. 342 , #6163
- About Us
ScienceShot: Marine Mud Is High in Fish Poop
22 February 2011 2:43 pm
Will you still enjoy feeling the beach between your toes this summer knowing it's partly fish feces? In a paper published online this week in the Proceedings of the National Academy of Sciences, researchers report that 14% of the calcium carbonate that makes up the muddy floors of shallow tropical seas is fish poop. Fecal samples from 11 common tropical fish, including barracudas and snappers, reveal that calcium carbonate forms a key component of the excrement. The team estimates that every year, tropical fish excrete 6.1 million kilograms of calcium carbonate, equivalent to the weight of 1000 adult elephants, over an area of 111,577 square kilometers. Each fish may even have its own unique "fecalprint", with specific sizes and shapes of calcium carbonate crystals (as seen in the black and white image), which could allow future oceanographers to analyze an ocean's mud to track changes in the numbers and diversity of fish species.
See more ScienceShots.
*This item has been corrected to reflect that every year, tropical fish excrete 6.1 million kilograms of calcium carbonate.