Agriculture
Making the most of a meal
Keeping Bugs Away from Food
Silk’s superpowers
Amphibians
Salamanders
Toads
Bullfrogs
Animals
Gliders in the Family
A Meal Plan for Birds
Pothole Repair, Insect-style
Behavior
Seeing red means danger ahead
Bringing fish back up to size
Sugar-pill medicine
Birds
Hummingbirds
Falcons
Kookaburras
Chemistry and Materials
Scientist Profile: Wally Gilbert
Unscrambling a Gem of a Mystery
Toxic Dirt + Avian Flu = Science Fair Success
Computers
Two monkeys see a more colorful world
Computers with Attitude
Hitting the redo button on evolution
Dinosaurs and Fossils
Tiny Pterodactyl
Dino-bite!
The Paleontologist and the Three Dinosaurs
E Learning Jamaica
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Snowflakes and Avalanches
Ancient Heights
Undersea Vent System Active for Ages
Environment
Where rivers run uphill
Groundwater and the Water Cycle
Blooming Jellies
Finding the Past
Stonehenge Settlement
Watching deep-space fireworks
The Puzzle of Ancient Mariners
Fish
Perches
Saltwater Fish
A Jellyfish's Blurry View
Food and Nutrition
How Super Are Superfruits?
The Color of Health
Recipe for Health
GSAT English Rules
Adjectives and Adverbs
Problems with Prepositions
Pronouns
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
GSAT Exams Jamaica Scholarships
2014 GSAT Results for Jamaican Kids
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
GSAT Mathematics
How to Slice a Cake Fairly
Math of the World
Deep-space dancers
Human Body
Workouts: Does Stretching Help?
A Sour Taste in Your Mouth
Teen Brains, Under Construction
Invertebrates
Worms
Crawfish
Sponges
Mammals
Siberian Husky
Siamese Cats
Miniature Schnauzers
Parents
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
How children learn
Physics
Einstein's Skateboard
Black Hole Journey
Speedy stars
Plants
Sweet, Sticky Science
Springing forward
Bright Blooms That Glow
Reptiles
Tortoises
Asp
Gila Monsters
Space and Astronomy
Cool as a Jupiter
Unveiling Titan
Solving a Sedna Mystery
Technology and Engineering
Toy Challenge
Reach for the Sky
Machine Copy
The Parts of Speech
Adjectives and Adverbs
Problems with Prepositions
What is a Verb?
Transportation
Middle school science adventures
Flying the Hyper Skies
Where rivers run uphill
Weather
Polar Ice Feels the Heat
Watering the Air
Where rivers run uphill
Add your Article

Mosquito duets

A mosquito’s whining buzz can be as irritating as its bite. But to a mosquito of the opposite sex, the high-pitched hum is the sound of romance. Skeeters create their distinctive sound by beating their wings at a certain rate, or a certain number of beats per second. The wing vibrations produce sound waves that resonate in their bodies and outside, too. Now, scientists have discovered that some mosquitoes can adjust the speed of their wing beats — and change the accompanying sound — to attract a potential mate. In a recent study, male and female Aedes aegypti mosquitoes raised the pitch, or highness or lowness, of their whine when they came within earshot of the opposite sex. By matching the rate at which they beat their wings — as well as their flight tone — the love-struck skeeters were able to perform a singing duet before mating. To harmonize, the skeeters had to adjust the pitch of their whine to include a quiet tone at 1,200 hertz. This is several times higher than the skeeters’ normal hum. A single female mosquito, for example, generally hums loudest at 400 hertz. Male mosquitoes hum loudest at a tone of 600 hertz. In the study, Lauren Cator of Cornell University and her colleagues fastened mosquitoes to flexible wires, and then flew the insects past stationary, or still, mosquitoes. The researchers recorded the insects’ flight tones with a specialized microphone. As a male and female flew by each other, their flight tones fell in sync, producing a faint harmonic note that the researchers picked up. The scientists also implanted tiny electrodes in organs used for hearing in the skeeters’ antennae. The researchers found that this organ is sensitive to sounds of up to 2,000 hertz. The findings were surprising. Until now, scientists didn't know that mosquitoes could hear such high sounds. In addition, researchers had previously thought that female A. aegypti mosquitoes were deaf. A. aegypti mosquitoes spread diseases such as yellow fever and dengue fever. The scientists hope that by interfering with the mosquitoes acoustic courtship process, they’ll find better ways to control mosquito populations in places where these diseases occur. One way to do this would be to trick the females into mating with sterile male mosquitoes, those that can’t produce offspring. This might work because once an A. aegypti female mated with a sterile male, she wouldn’t mate with anyone else. Females tend to shun, or ignore, other males after mating. Cator and her colleagues note in the study that other disease-carrying insects have been controlled by the release of sterile males. At least A. aegypti females would be serenaded in the process.

Mosquito duets
Mosquito duets








Designed and Powered by HBJamaica.com™