Agriculture
New Gene Fights Potato Blight
Getting the dirt on carbon
Microbes at the Gas Pump
Amphibians
Frogs and Toads
Salamanders
Toads
Animals
Return of the Lost Limbs
Monkey Math
Big Squid
Behavior
Night of the living ants
The Snappy Lingo of Instant Messages
Baby Talk
Birds
Kiwis
Storks
Doves
Chemistry and Materials
Cold, colder and coldest ice
The Incredible Shrunken Kids
Supergoo to the rescue
Computers
Nonstop Robot
The Shape of the Internet
Music of the Future
Dinosaurs and Fossils
A Living Fossil
Dinosaur Eggs-citement
Three strikes wiped out woolly mammoths
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
Distant Quake Changes Geyser Eruptions
Hot Summers, Wild Fires
Undersea Vent System Active for Ages
Environment
What is groundwater
Snow Traps
Whale Watch
Finding the Past
Words of the Distant Past
Fakes in the museum
Decoding a Beverage Jar
Fish
Cleaning Up Fish Farms
Halibut
Piranha
Food and Nutrition
In Search of the Perfect French Fry
Food for Life
Making good, brown fat
GSAT English Rules
Who vs. That vs. Which
Whoever vs. Whomever
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
Results of GSAT are in schools this week
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
42,000 students will sit for the GSAT Exam in two weeks
Results of GSAT are in schools this week
GSAT Mathematics
42,000 students will sit for the GSAT Exam in two weeks
Math and our number sense: PassGSAT.com
Math Naturals
Human Body
From Stem Cell to Any Cell
Disease Detectives
Taking the sting out of scorpion venom
Invertebrates
Ants
Leeches
Clams
Mammals
Bison
Bloodhounds
Whales
Parents
How children learn
Raise a Lifelong Reader by Reading Aloud
What Not to Say to Emerging Readers
Physics
Project Music
The Mirror Universe of Antimatter
Road Bumps
Plants
Flower family knows its roots
Getting the dirt on carbon
Nature's Alphabet
Reptiles
Komodo Dragons
Caimans
Crocodilians
Space and Astronomy
Burst Busters
Big Galaxy Swallows Little Galaxy
A Dusty Birthplace
Technology and Engineering
Slip Sliming Away
Toy Challenge
Young Scientists Take Flight
The Parts of Speech
What is a Verb?
Pronouns
What is a Noun
Transportation
Troubles with Hubble
Revving Up Green Machines
Charged cars that would charge
Weather
Recipe for a Hurricane
The Best Defense Is a Good Snow Fence
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™