Agriculture
Protecting Cows—and People—from a Deadly Disease
Cleaning Up Fish Farms
Earth-Friendly Fabrics
Amphibians
Salamanders
Toads
Frogs and Toads
Animals
Insect Stowaways
Hot Pepper, Hot Spider
Bee Disease
Behavior
The (kids') eyes have it
Two monkeys see a more colorful world
Listen and Learn
Birds
Parrots
Flightless Birds
Macaws
Chemistry and Materials
A Spider's Silky Strength
Pencil Thin
Silk’s superpowers
Computers
The solar system's biggest junkyard
Games with a Purpose
Batteries built by Viruses
Dinosaurs and Fossils
A Dino King's Ancestor
Digging for Ancient DNA
Dinosaurs Grow Up
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Earth
Deep History
In Antarctica watch the heat (and your step)
Hot Summers, Wild Fires
Environment
Food Web Woes
A 'Book' on Every Living Thing
Seabirds Deliver Arctic Pollutants
Finding the Past
Prehistoric Trips to the Dentist
A Long Haul
Unearthing Ancient Astronomy
Fish
Skates
Bull Sharks
Flounder
Food and Nutrition
Sponges' secret weapon
A Pepper Part that Burns Fat
Eat Out, Eat Smart
GSAT English Rules
Pronouns
Subject and Verb Agreement
Capitalization Rules
GSAT Exam Preparation Jamaica
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
Results of GSAT are in schools this week
How are students placed after passing the GSAT exam
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
GSAT stars reap scholarship glory
GSAT Exam Preparation
GSAT Mathematics
How a Venus Flytrap Snaps Shut
Math of the World
How to Slice a Cake Fairly
Human Body
Hey batter, wake up!
A Better Flu Shot
The tell-tale bacteria
Invertebrates
Insects
Mosquitos
Flies
Mammals
African Ostrich
Pugs
Humpback Whales
Parents
Expert report highlights the importance to parents of reading to children!
The Surprising Meaning and Benefits of Nursery Rhymes
Choosing a Preschool: What to Consider
Physics
Invisibility Ring
One ring around them all
Gaining a Swift Lift
Plants
Bright Blooms That Glow
Surprise Visitor
Fungus Hunt
Reptiles
Cobras
Black Mamba
Turtles
Space and Astronomy
A Family in Space
A Dead Star's Dusty Ring
Cool as a Jupiter
Technology and Engineering
Riding Sunlight
Squeezing Oil from Old Wells
Supersuits for Superheroes
The Parts of Speech
What is a Preposition?
Problems with Prepositions
Pronouns
Transportation
Seen on the Science Fair Scene
Troubles with Hubble
How to Fly Like a Bat
Weather
Weekend Weather Really Is Different
Science loses out when ice caps melt
Watering the Air
Add your Article

Electric Eel

The electric eel (Electrophorus electricus) is a species of fish capable of generating powerful electric shocks of up to 650 volts, which it uses for both hunting and self-defense. Despite its name it is not an eel at all but rather a knifefish! Electric eels can grow up to 2.5 m (about 8.2 feet) in length and 20 kg (about 44 pounds) in weight, although 1 m specimens are more common. A typical example will have an elongated, cylindrical body bearing only a few scales, a flattened head, and an overall dark grayish green color shifting to yellowish on the bottom. Who Needs Gills? The electric eel may be found in the basins of both the Amazon River and Orinoco River, as well as the surrounding areas. They tend to live on muddy bottoms in calm water and are obligate air-breathers; rising to the surface every 10 minutes or so, the animal will gulp air before returning to the bottom. Nearly 80% of the oxygen used by the fish is taken in this way. Good Hearing: Scientists have been able to determine through experimental information that E. electricus has a well developed sense of sound. They have a Weberian apparatus that connects the ear to the swim bladder, which greatly enhances their hearing capability. Bathing Battery: The electric eel generates its characteristic electrical pulse in a manner similar to a battery, in which stacked plates produce an electrical charge. In the electric eel, some 5,000 to 6,000 stacked electroplaques are capable of producing a shock at up to 500 volts and 1 ampere of current (500 watts). There are reports of animals producing larger voltages, but the typical output is sufficient to stun or deter virtually any other animal. Juveniles produce smaller voltages (about 100 volts). Electric eels are capable of varying the intensity of the electrical discharge, using lower discharges for "hunting" and higher intensities are used for stunning prey, or defending themselves. When agitated, it is capable of producing these intermittent electrical shocks over a period of at least an hour without signs of tiring. The exact mechanism remains largely unknown. The Sachs organ, a stack of electroplaques, is the primary source of communication among E. electricus. This organ transmits a weak signal, only about 10V in amplitude. These signals are used in communication as well as orientation, and are used to find prey and locate and choose a mate. Although the eels are common in their range and popular draws for public aquaria, the eel's habit of delivering shocks, even when gently handled, means that they are too dangerous for most amateurs to try to keep at home. Moreover, the animals grow very large, and are impossible to maintain for all but the most dedicated of keepers. Countries such as Australia strictly forbid the keeping of electric eels, for fear that they could escape into the wild and become a public hazard. The species is so unusual that it has been reclassified several times. Originally a species in Gymnotus, it was later given its own family Electrophoridae, and then demoted to a genus of Gymnotidae alongside Gymnotus. Similar species are the electric catfish (Malapterurus electricus) and the electric ray (Torpedo mamorata, T. californica).

Electric Eel
Electric Eel








Designed and Powered by HBJamaica.com™