Sonar monitors California squid fishery

Feb 07, 2006

California's $30-million-a-year squid industry has quadrupled during the past decade and now scientists are using sonar to assess squid stocks.

A multi-institutional team of scientists this month reported a new sonar technique to locate squid egg clusters in the murky depths of the ocean, offering a window onto next year's potential squid population.

The scientists demonstrated the new sonar method off the coast of Monterey, Calif., where fishermen harvest squid in April and May as the squid return to spawn and lay clusters of finger-sized egg capsules on the seafloor.

"This method provides an efficient way to map distributions and estimate abundances of squid eggs and monitor them year to year to get a census for next year's population," said Kenneth Foote, a marine acoustics expert at Woods Hole Oceanographic Institution in Massachusetts and lead author of project.

"It has immediate potential to give resource managers sound scientific information to make decisions on how to sustain the fishery. Otherwise, they're just guessing."

The research is reported in the February issue of the Journal of the Acoustical Society of America.

Copyright 2006 by United Press International

Explore further: Holiday lights on the Sun: SDO imagery of a significant solar flare

add to favorites email to friend print save as pdf

Related Stories

Whales evolved biosonar to chase squid into the deep

Sep 05, 2007

Behind the sailor's lore of fearsome battles between sperm whale and giant squid lies a deep question of evolution: How did these leviathans develop the underwater sonar needed to chase and catch squid in ...

Recommended for you

Scientists 'map' water vapor in Martian atmosphere

7 hours ago

Russian scientists from the Space Research Institute of the Russian Academy of Sciences and the Moscow Institute of Physics and Technology (MIPT), together with their French and American colleagues, have ...

Water fleas prepared for trip to space

11 hours ago

Local 'Daphnia' waterfleas are currently being prepared by scientists at the University of Birmingham for their trip to the International Space Station (ISS), where they will be observed by astronauts.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.