Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Self-Propelled Underwater Fish Cages
A self-propelled underwater fish cage developed and recently tested by an MIT researcher may provide a way for fish farming to move out onto the open ocean.
(Giant self-propelled fish farm video)
Cliff Goudey, director of MIT Sea Grant's Offshore Aquaculture Engineering Center, is exploring a different approach to moving the cages. By placing large, slow-turning propellers directly on a cage, Goudey frees it from the normal constraints of a boat. His system uses a pair of eight-foot diameter, electrically powered propellers, with 6.2-horsepower underwater motors. The motors are powered through tethers to the surface attached to a diesel generator and a pair of motor controllers mounted on a small boat.Recently he tested the approach at Snapperfarm Inc., an offshore fish farm in Culebra, Puerto Rico, that grows cobia in submerged cages. By fixing a pair of the propellers to the mid-depth of a 62-foot diameter Aquapod® fish cage in a horizontal line 9 feet apart, Goudey maneuvered the cage as well as any boat-based system.
Mobile fish cages could solve a variety of problems related to fish farming in the open ocean. The limiting factor in the number of fish that can be raised in a cage is often the oxygen content of the water during slack water. A moving cage could ensure a steady supply of fresh water.
Fish farming, in the sense of raising fish in a land enclosure for food, has been around for centuries. Mariculture, the raising of fish for food in the open ocean, is only a few decades old.
Update 27-Jan-2024: This is a patent drawing submitted by Hugo Gernsback, not part of a science fiction story, however:
(Hydraulic Fishery patent drawing by Hugo Gernsback in 1953)
End update.
From MIT tests self-propelled cage for fish farming.
Scroll down for more stories in the same category. (Story submitted 9/11/2008)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 2 )
Related News Stories - (" Biology ")
Lunar Biorepository Proposed For Cryo-Preservation Of Earth Species
'...there was no one alive who had ever seen them. But they existed in the Life Bank.' - John Varley, 1977.
Let's Make Slaver Sunflowers! Engineering Plants To Reflect Light
'The mirror-blossom was a terrible weapon.' - Larry Niven, 1965.
Machete-Wielding Philodendron Isn't Going To Take It Anymore
'The tree ended its wild larruping, stood like a dreaming giant liable to wake into frenzy at any moment.' - Eric Frank Russell, 1943.
Tsunami Forecasts Improved By Ionosphere Signals
'Swifter than any tide could ebb, the water was receding from the shore.'
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Mechazilla Arms Catch A Falling Starship, But Check Out SF Landing-ARMS
'...the rocket’s landing-arms automatically unfolded.'
A System To Defeat AI Face Recognition
'...points and patches of light... sliding all over their faces in a programmed manner that had been designed to foil facial recognition systems.'
Robot Hand Separate From Robot
'The crawling, exploring object was V-Stephen's surgeon-hand...'
Hybrid Wind Solar Devices
'...the combined Wind-Suncatcher, like a spray of tulips mounted fanwise.'
Is Optimus Autonomous Or Teleoperated?
'I went to the control room where the three other men were manipulating their mechanical men.'
Robot Masseuse Rubs People The Right Way
'The automatic massager began to fumble gently...'
Solar-Powered Space Trains On The Moon
'The low-slung monorail car, straddling its single track, bored through the shadows on a slowly rising course.'
Drone Deliveries Instead Of Waiters In Restaurants?
'It was a smooth ovoid floating a few inches from the floor...'
Optimus Robot Can Charge Itself
'... he thrust in his charging arm to replenish his store of energy.'
Skip Movewear Arc'teryx AI Pants
'...the terrible Jovian gravity that made each movement an effort.'
'Robovan' Name Already Taken - Elon, Try These
There are alternative names that are probably in the public domain by now.
How Old Are Tesla Designs?
You be the judge.
Is Your Autonomous Tractor Safe?
'The field-minder finished turning the top-soil of a two-thousand-acre field.'
Smart TVs Are Listening!
'You had to live -- did live, from habit that became instinct -- in the assumption that every sound you made was overheard...'
Police Drones In China Would Like To Have A Word With You
''OVERRIDE,' the City Fathers said suddenly, without being asked anything at all.'
Oh Great (Part 2), Fence-Climbing Robots
Please, no stingers.
