Agriculture
Making the most of a meal
Hungry bug seeks hot meal
Where Have All the Bees Gone?
Amphibians
Frogs and Toads
Tree Frogs
Newts
Animals
Staying Away from Sick Lobsters
Color-Changing Bugs
A Butterfly's New Green Glow
Behavior
Night of the living ants
Nice Chimps
Fear Matters
Birds
Seagulls
A Meal Plan for Birds
Birds We Eat
Chemistry and Materials
A Diamond Polish for Ancient Tools
The newest superheavy in town
Salt secrets
Computers
Secrets of an Ancient Computer
A Light Delay
The hungry blob at the edge of the universe
Dinosaurs and Fossils
Dino Flesh from Fossil Bone
Dino Bite Leaves a Tooth
An Ancient Spider's Web
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Earth
Science loses out when ice caps melt
Distant Quake Changes Geyser Eruptions
Salty, Old and, Perhaps, a Sign of Early Life
Environment
Ready, unplug, drive
A Change in Climate
Acid Snails
Finding the Past
Oldest Writing in the New World
The Puzzle of Ancient Mariners
A Human Migration Fueled by Dung?
Fish
Hagfish
Puffer Fish
Parrotfish
Food and Nutrition
Allergies: From Bee Stings to Peanuts
The Essence of Celery
A Pepper Part that Burns Fat
GSAT English Rules
Problems with Prepositions
Who vs. Whom
Pronouns
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
2014 GSAT Results for Jamaican Kids
GSAT Exam Preparation
GSAT Mathematics
Monkeys Count
Deep-space dancers
Math of the World
Human Body
Disease Detectives
Heart Revival
Cell Phones and Possible Health Hazards
Invertebrates
Snails
Nautiluses
Giant Clam
Mammals
Dalmatians
Numbats
Lhasa Apsos
Parents
Expert report highlights the importance to parents of reading to children!
How children learn
Choosing a Preschool: What to Consider
Physics
Echoes of a Stretched Egg
The Mirror Universe of Antimatter
Thinner Air, Less Splatter
Plants
Flower family knows its roots
A Giant Flower's New Family
Nature's Alphabet
Reptiles
Alligators
Box Turtles
Black Mamba
Space and Astronomy
Intruder Alert: Sweeping Space for Dust
Evidence of a Wet Mars
Baby Star
Technology and Engineering
Searching for Alien Life
Beyond Bar Codes
Crime Lab
The Parts of Speech
What is a Noun
What is a Verb?
Problems with Prepositions
Transportation
How to Fly Like a Bat
Flying the Hyper Skies
Troubles with Hubble
Weather
Catching Some Rays
A Dire Shortage of Water
Either Martians or Mars has gas
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™