Agriculture
Treating peanut allergy bit by bit
Cleaning Up Fish Farms
Chicken Eggs as Drug Factories
Amphibians
Frogs and Toads
Tree Frogs
Poison Dart Frogs
Animals
How to Fly Like a Bat
Putting a Mouse on Pause
How to Silence a Cricket
Behavior
A Global Warming Flap
Body clocks
Face values
Birds
Quails
Pelicans
Kingfishers
Chemistry and Materials
Big Machine Reveals Small Worlds
Graphene's superstrength
These gems make their own way
Computers
The solar system's biggest junkyard
The hungry blob at the edge of the universe
Toxic Dirt + Avian Flu = Science Fair Success
Dinosaurs and Fossils
Have shell, will travel
Dino-Dining Dinosaurs
A Really Big (but Extinct) Rodent
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
In Antarctica watch the heat (and your step)
A Grim Future for Some Killer Whales
Unnatural Disasters
Environment
Shrimpy Invaders
The Wolf and the Cow
Sea Otters, Kelp, and Killer Whales
Finding the Past
Words of the Distant Past
Little People Cause Big Surprise
If Only Bones Could Speak
Fish
Carp
Megamouth Sharks
Electric Eel
Food and Nutrition
The mercury in that tuna
Turning to Sweets, Fats to Calm the Brain
Making good, brown fat
GSAT English Rules
Order of Adjectives
Capitalization Rules
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
Ministry of Education Announces 82 GSAT Scholarships for 2010
How are students placed after passing the GSAT exam
GSAT Exam Preparation
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
2014 GSAT Results for Jamaican Kids
GSAT stars reap scholarship glory
GSAT Mathematics
42,000 students will sit for the GSAT Exam in two weeks
Deep-space dancers
Play for Science
Human Body
A Fix for Injured Knees
Football Scrapes and Nasty Infections
Surviving Olympic Heat
Invertebrates
Flies
Grasshoppers
Lice
Mammals
Chihuahuas
Capybaras
Numbats
Parents
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
Physics
Invisibility Ring
Einstein's Skateboard
IceCube Science
Plants
A Change in Leaf Color
Fast-flying fungal spores
Nature's Alphabet
Reptiles
Crocodiles
Anacondas
Chameleons
Space and Astronomy
A Planet's Slim-Fast Plan
Planets on the Edge
Pluto's New Moons
Technology and Engineering
Spinach Power for Solar Cells
A Micro-Dose of Your Own Medicine
Beyond Bar Codes
The Parts of Speech
What is a Noun
Pronouns
Countable and Uncountable Nouns
Transportation
Ready, unplug, drive
Seen on the Science Fair Scene
Charged cars that would charge
Weather
A Dire Shortage of Water
A Change in Climate
Warmest Year on Record
Add your Article

Poison Dart Frogs

The poison dart frog, poison arrow frog, dart frog or poison frog, is the common name given to the group of frogs belonging to the family Dendrobatidae. Poison dart frogs are native to two geographical regions: Central America and South America. The Green and Black Poison Dart Frog (Dendrobates auratus) has been introduced to a few Hawaiian islands. Beautiful colored skin: Poison dart frogs are popularly characterized by their brightly colored skin and small size. The skin color can range from bright orange and black to blue or yellow. However, members of the most species-rich genus, Colostethus, are generally brown. Poison dart frogs range in size from 1 centimetre (0.2 in) to 6 centimetres (2.5 in) in length, depending on the age and species of the frog. Beautiful but deadly: Poison dart frogs are a group of small, diurnal, and often brightly colored frogs native to Central and South America. These frogs received their common name from the numerous types of poisonous alkaloids found in the skin of many species. The most poisonous dart frog is the Golden Poison Dart Frog (Phyllobates terribilis). There are well over 100 different species of poison dart frogs, only few of which are toxic to animals and humans. More than 100 toxins have been identified in the skin secretions of poison dart frogs, especially Dendrobates and Phyllobates. Members of the genus Dendrobates (of which there are at least 44 known species) are also known as "poison dart" or "poison arrow" frogs. However, only frogs of the genus Phyllobates produce the extremely potent neurotoxin, batrachotoxin, and its derivatives. Even a very small amount of the batrachotoxin found in the skins of the Golden Poison Dart Frog and at least two other species of Phyllobates frogs - on the order of just 40 micrograms - can be fatal. For the Golden Poison Dart Frog, merely touching the frog's back with the tip of the tongue could be enough to transfer a lethal dose of poison (which is most readily absorbed via mucous membranes). Certain tribes in South America, such as the Noanamá Chocó and Emberá Chocó indians of western Colombia, dip the tips of their blowgun darts in the poison found on the skin of three species of Phyllobates. In north Chocó, Phyllobates aurotaenia is used while to the south, in the departments of Risaralda and Choco, P. bicolor is used. In Cauca, even southern Cauca, P. terribilis is used for dart making. (Despite sometimes being called "poison arrow frogs" no examples are known of arrows, as opposed to darts, being poisoned with Phyllobates poison). No other species are used for this purpose. The poison is generally collected by roasting the frogs over a fire, but the toxins in P. terribilis are so strong that it is sufficient to dip the dart in the back of the frog without killing it. Highly effective toxins: When a wild animal is shot with a poison-tipped dart, it will die within minutes from the neurotoxin, making additional shots unnecessary to kill it. Poison darts made from either fresh or fermented batrachotoxin are enough to drop monkeys and birds in their tracks since nerve paralysis is almost instantaneous. No toxic insects, no toxic frogs: There is considerable evidence that toxicity in hese frogs is derived from their diet: primarily ants, mites, and beetles. These toxins are passed from the arthropod to the frog, then sequestered in glands on the amphibian's skin. Frogs brought from the wild into captivity and fed a regular captive diet, usually fruit flies or pin-head (hatchling) crickets, eventually lose their toxicity. Vile smells for defense: Species of the genus Aromobates has evolved another type of chemical defense: it is not toxic, but when frightened it secretes a sticky mucus which has an extremely vile odor suggestive of skunk sprayings which repels mammalian predators. The vernacular name "Skunk Frog" of the single species Aromobates nocturnus derives from this peculiar behavior.

Poison Dart Frogs
Poison Dart Frogs








Designed and Powered by HBJamaica.com™