Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror

Slashdot videos: Now with more Slashdot!

  • View

  • Discuss

  • Share

We've improved Slashdot's video section; now you can view our video interviews, product close-ups and site visits with all the usual Slashdot options to comment, share, etc. No more walled garden! It's a work in progress -- we hope you'll check it out (Learn more about the recent updates).

×
Science

+ - Shark Embryos Sense Electric Fields->

Submitted by sciencehabit
sciencehabit (1205606) writes "Sharks are one of many marine creatures that can sense electrical fields emanating from other animals, and they use this sixth sense to find prey. Brown-banded bamboo sharks can sense these fields even before they've hatched from their egg cases, researchers report. Scientists hung 11 egg cases containing shark embryos 3 to 4 months old in a water tank in front of a bright light, exposing the developing sharks' silhouettes. Normally, an embryo pulses its gills actively. But when researchers turned on electrodes to produce an electric field near the egg cases, the unhatched sharks froze and stilled their gills for several seconds. The researchers suggest that freezing is a response to the presence of possible predators, such as other sharks. By freezing, the embryo may reduce its heart rate, which in turn may also reduce its own electric field, making it harder for predators to notice it."
Link to Original Source
This discussion was created for logged-in users only, but now has been archived. No new comments can be posted.

Shark Embryos Sense Electric Fields

Comments Filter:

The meat is rotten, but the booze is holding out. Computer translation of "The spirit is willing, but the flesh is weak."

Working...