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Tag: "wings" at biology news

Massive herds of animals found to still exist in Southern Sudan

...ey observed between two sets of rods placed on the wings of the plane. Using statistical techniques of extrapolation, they calculated estimates of how many animals there were on a landscape. To their surprise, the results in Boma showed little difference in the numbers of white-eared kob counted in the ’...

Eating with our eyes: Why people eat less at unbused tables

...a sports bar where an open buffet featured chicken wings during the Super Bowl; some tables were bused and some were left unbused. To use environmental cues to curb overeating and overdrinking, Wansink suggested that college parties could encourage (or require) fresh plastic glasses for each drink and th...

Post oak grasshoppers emerging

...majority of adult post oak grasshoppers have short wings and are flightless, Behmer said, but they love to climb up trees and houses. "Last year they were in enormous amounts," Junek said, "and mainly on the east side of my house." If hordes of grasshoppers on houses aren't bad enough, they make th...

A case of mistaken identity for the ivory-billed woodpecker?

...black and white species. The Pileated Woodpecker's wings were thought to beat more slowly that the 8.6 beats per second captured on Luneau's video, and its wings have black trailing edges. The trailing edges of the Ivory-billed Woodpecker's wings are white. A...

Protein key to organ growth

...ound that in the case of dysfunction, the eyes and wings get smaller," said Choi. "If you completely knock out this function in the eye, they have no eyes." TCTP was of interest because it is over-expressed or overabundant in cancer cells. "If you reduce the levels of TCTP, tumor cells revert to nor...

Bumblebee house warming -- it takes a village

...eloping bees or brood. Other workers fanned their wings to cool the nest when the temperature became too hot. Performance of various in-nest tasks is not interchangeable among these social insects. Instead, the researchers found strong evidence for job specialization, even when a colony was artificiall...

Biologists call for better choice of model organisms in 'evo-devo'

... "If we want to understand how insects evolved wings or how legs developed from fins, we need to judiciously choose several models from specific parts of the phylogenetic tree. "There is little point in blindly increasing the diversity of model systems, without some specific goals in mind. "Our t...

Breathing easy: When it comes to oxygen, a bug's life is full of it

...ystem works. Insects employ autoventilation (using wings or legs to pump air through the body), abdominal pumping (using the muscles in the abdomen to pump air), and tracheal compression (getting oxygen to the head and thorax). ...

With fruit fly sex, researchers find mind-body connection

...ho during courting ?chasing females, shaking their wings to "sing" love songs, tapping or licking their intended mates. In females, doublesex worked together with the gene retained to make them more receptive to this wooing; Females with two good copies of the gene were more likely to listen to love songs ...

Fruit fly aggression studies have relevance to humans, animals

...s a focal fly would chase, kick, box, or flick his wings at other flies. "Some animals will very vigorously defend their little food patch, whereas others are relatively polite," Mackay said. "To determine if this had a genetic basis, we conducted a selection experiment." For the selection experiment, E...

Ancient birds flew on all-fours

...es by gliding from trees using primitive feathered wings on their arms and legs, according to new research by a University of Calgary paleontologist. In a paper published in the journal Paleobiology, Department of Biological Sciences PhD student Nick Longrich challenges the idea that birds began flying by ...

Protowings may have helped bird ancestors cover rough terrain

...e to fly, however, the birds flap their developing wings in a characteristic way while running, which impro...riments showing that if the surface area of chukar wings is reduced by plucking or trimming the feathers, WAIR becomes less effective for climbing slopes. Di...

Tumor cells that border normal tissue are told to leave

...research team created tumors in fruit fly eyes and wings that permitted them to study the behavior of individual tumor cells. "We found that the tumor cells in direct contact with normal cells had a different behavior than cells further inside the tumor," says lead author Marcos Vidal, Ph.D., research as...

UCSD biologists find new evidence for one-way evolution

...e idea that the loss of complex traits, like eyes, wings or in this case a reproductive mechanism, is often irreversible. In other words, once lost, the traits never revert to their original state. "This is the strongest evidence yet to support irreversibility," said Joshua Kohn, an associate professor o...

Gene needed for butterfly transformation also key for insects like grasshoppers

...becomes an adult, but adult structures such as the wings are severely undersized. "Broad is not required to transform into the adult, but it is needed to move through the series of nymphal stages," she said. "An insect should look different from one stage to the next, but if you remove broad it doesn't." ...

Scientist uses dragonflies to better understand flight

...t do better than to emulate a dragonfly. With four wings instead of the standard two and an unusual pitchin..., she said, and then examine how insects use their wings to manipulate that environment and stay aloft. "The major question I focus on is the question of ef...

UCSD study finds anthrax toxins also harmful to fruit flies

...ly larvae and can cause severe malformation in the wings of adult fruit flies--an effect that can also be understood as an interruption of another unrelated signaling process common to flies and humans. "We asked the simple question of whether anthrax toxins affecting mammals could act on the fly counter...

Bats use touch receptors on wings to fly, catch prey, study finds

...ht suggest that touch-sensitive receptors on bats' wings help them maintain altitude and catch insects in m...ok believes the touch-sensitive receptors on bats' wings work in conjunction with echolocation to make bats better, more accurate nocturnal hunters. Echoloca...

Wright bros. upstaged! Dinos invented biplanes

...econstructed Microraptor had guessed that its four wings were used in tandem, similar to those of dragonfly...ranches of another tree without having to flap its wings and expend muscular energy. "The biplane wing configuration was probably a very first experiment i...

Female butterflies go for sparkle -- not size -- when choosing to mate

...not the size of the eyespots on a male butterfly's wings when female butterflies consider potential mates. ...ng-pattern elements through carefully painting the wings or by pairing males displaying traits of different size and color. They then tested female preferenc...

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