Agriculture
New Gene Fights Potato Blight
Where Have All the Bees Gone?
Springing forward
Amphibians
Toads
Bullfrogs
Salamanders and Newts
Animals
Big Squid
Moss Echoes of Hunting
Staying Away from Sick Lobsters
Behavior
Newly named fish crawls and hops
From dipping to fishing
Reading Body Language
Birds
Woodpecker
Songbirds
Mockingbirds
Chemistry and Materials
Scientist Profile: Wally Gilbert
Screaming for Ice Cream
The hungry blob at the edge of the universe
Computers
Nonstop Robot
Galaxies on the go
New eyes to scan the skies
Dinosaurs and Fossils
Dinosaur Eggs-citement
A Really Big (but Extinct) Rodent
A Living Fossil
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Recipe for a Hurricane
Greener Diet
Rodent Rubbish as an Ice-Age Thermometer
Environment
An Ocean View's Downside
Saving Wetlands
Pumping Up Poison Ivy
Finding the Past
Oldest Writing in the New World
A Volcano's Deadly Ash
A Long Trek to Asia
Fish
Trout
Perches
Freshwater Fish
Food and Nutrition
Moving Good Fats from Fish to Mice
Packing Fat
Recipe for Health
GSAT English Rules
Pronouns
Subject and Verb Agreement
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
How are students placed after passing the GSAT exam
10 Common Mistakes When Preparing for the GSAT Math Test
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Scholarship
GSAT stars reap scholarship glory
GSAT Mathematics
Detecting True Art
Math Naturals
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Human Body
Taste Messenger
Teen Brains, Under Construction
Hey batter, wake up!
Invertebrates
Shrimps
Camel Spiders
Oysters
Mammals
Dalmatians
Humans
Pekingese
Parents
The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
What Not to Say to Emerging Readers
Physics
Einstein's Skateboard
Strange Universe: The Stuff of Darkness
Black Hole Journey
Plants
Hungry bug seeks hot meal
When Fungi and Algae Marry
Surprise Visitor
Reptiles
Cobras
Asp
Snakes
Space and Astronomy
Chaos Among the Planets
Tossing Out a Black Hole Life Preserver
A Moon's Icy Spray
Technology and Engineering
Musclebots Take Some Steps
Young Scientists Take Flight
Sugar Power for Cell Phones
The Parts of Speech
Countable and Uncountable Nouns
What is a Verb?
What is a Noun
Transportation
Are Propellers Fin-ished?
Where rivers run uphill
Reach for the Sky
Weather
Either Martians or Mars has gas
Weekend Weather Really Is Different
Recipe for a Hurricane
Add your Article

Sting Ray

Dasyatids swim with a "flying" motion, propelled by motion of their large pectoral fins (commonly referred to as "wings"). Their stinger is a razor-sharp, barbed or serrated cartilaginous spine which grows from the ray's whip-like tail (like a fingernail). It is coated with a toxic venom. This gives them their common name of stingrays, but that name can also be used to refer to any poisonous ray. Dasyatids are common in tropical coastal waters throughout the world, and there are fresh water species in Asia (Himantura sp.), Africa, and Florida (Dasyatis sabina). Most dasyatids are neither threatened nor endangered. The species of the genera Potamotrygon, Paratrygon, and Plesiotrygon are all endemic to the freshwaters of South America. Rays Can't See Their Prey: Since their eyes are on top of their head, and their mouths on the bottom, they cannot see their prey, and instead use their sense of smell and electro-receptors similar to those of the shark. They feed primarily on mollusks and crustaceans, as their mouths contain powerful, shell-crushing teeth, or occasionally on smaller fish; rays settle on the bottom while feeding, sometimes leaving only the eyes and tail visible. Gentle Giants: Dasyatids do not attack aggressively, or even actively defend themselves. When threatened, their primary reaction is to swim away; however, when they are attacked by predators or stepped on, the barbed stinger in their tail is mechanically whipped up, usually into the offending foot; it is also possible, although less likely, to be stung "accidentally" by brushing against the stinger. Contact with the stinger causes local trauma (from the cut itself), pain and swelling from the venom, and possible infection from parts of the stinger left in the wound, as well as from seawater entering the wound. It is possible for ray stings to be fatal if they sever major arteries, occur in the chest or pelvic region, or are improperly treated. Their stingers are normally ineffective against their main predator, sharks. Like other rays, dasyatids are viviparous (bearing live young in "litters" of 5–10). Treatment for stings includes hot water (as hot as the victim can stand), which helps ease pain and break down the venom, and antibiotics. Vinegar or urine may or may not be successful in easing pain; neither cleans the wound properly. Other possible pain remedies include papain (papaya extract, contained in unseasoned powdered meat tenderizer), which may break down the protein of the toxins, though this may be more appropriate for jellyfish and similar stings. Pain normally lasts up to 48 hours but is most severe in the first 30-60 minutes and may be accompanied by nausea, fatigue, headaches, fever, and chills. See the Rays! Dasyatids are not normally visible to swimmers, but divers and snorkelers may find them in shallow sandy waters, more so when the water is unseasonably warm. In the Cayman Islands, there are a couple of dive sites (each called "Stingray City") where divers and snorkelers can swim with large southern stingrays (Dasyatis americana) and feed them by hand. There is also a "Stingray City" in the sea surrounding the Caribbean island of Antigua. It consists of a large, shallow reserve where the rays live and snorkelling is possible, as the rays there are said to be very friendly. Small rays and other fishes can be petted in a "tactile tank" at Nausicäa, a large aquarium park in Boulogne-sur-Mer, on the English Channel coast in northern France. One ray has been known to be so friendly it tries to expose its entire ventral surface, ending up toppling over backward. Rays on a Plate: Rays may be caught on a fishing line using small crabs as bait, and are often caught accidentally; they may also be speared from above. They are edible; small rays may be cooked similarly to other fish, typically grilled or battered and fried. While not valuable themselves, stingrays can damage shellfishing grounds. Stingray recipes abound throughout the world. Generally, the most prized parts of the stingray are the fins, the "cheek" (the area surrounding the eyes,) and the liver. The rest of the ray is considered too rubbery to have any culinary uses.

Sting Ray
Sting Ray








Designed and Powered by HBJamaica.com™