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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Robot Records Fish Farts
26 March 2012 6:19 pm
Researchers hoping to better understand fish distributions by recording the sounds they make have picked up something unusual: barely-audible, cricket-like noises they think could be nighttime fish farts. The team programmed a torpedo-shaped robot called a glider to head out to sea from Tampa Bay and back, running up and down the water column in a saw-tooth pattern, sampling ocean sounds for 25 seconds every 5 minutes. The glider also recorded location data and measured seawater temperature, salinity, and depth over the course of 1 week. By comparing the grunts and whistles on their recordings to known fish calls, University of South Florida researchers found red grouper (shown, Epinephelus morio) and toadfishes (Opsanus spp.) were the most frequent fish sounds recorded, the team reports this month in Marine Ecology Progress Series. These fish produced sounds throughout the day and night, mostly deeper than 40 meters. The probable farts were recorded shallower than 40 meters, and were most likely a group of fish, including menhaden and herring, releasing gas from an internal buoyancy organ called a swim bladder. By mapping these sounds, the researchers hope to get a better picture of species distributions and likely spawning areas—important information for management and conservation efforts.
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