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Tag: "larvae" at biology news

Amphibians in losing race with environmental change

...re oxygenated environment, increase growth rate of larvae and reduce predation. But the increased levels of UV-B radiation in today's sunlight, due to erosion of the Earth's ozone layer, is causing mutations, impaired immune systems and slower growth rates. Through evolution, amphibians were able to adapt t...

Why do oysters choose to live where they could be eaten?

...isk of being eaten by cannibalistic adults, oyster larvae choose to settle in areas of high oyster concentra...reproductive capacity when they mature. "Oyster larvae make a life or death decision when they get their one chance to select where to attach themselves to...

Maggots rid patients of MRSA

... Andrew Boulton and his team used green bottle fly larvae to treat 13 diabetic patients whose foot ulcers we... and reduced blood supply, with sterile free-range larvae of the green bottle fly Lucilia Sericata. They applied the larvae between two and eight times, depen...

Survival of the rarest: Fruit flies shed light on the evolution of behavior

... gene (either the "rover" or "sitter" type). Rover larvae move around more than sitter larvae while feeding and they are also more likely to explore new food patches than sitters. The researcher...

Palau's coral reefs show differential habitat recovery following the 1998 bleaching event

...ave-exposed sites," by providing a supply of coral larvae to the damaged reefs. The researchers also found that recovery rates were significantly higher between 2002 and 2004 than between 2001-2002. Because Micronesia is at a great distance from large human population centers, van Woesik hy...

Hives ferment a yeasty brew, attract beetle pest

...lly decide to abandon the hive, leaving the beetle larvae to consume all the stored food, reproduce and multiply. "If beekeepers can reverse the trend and eliminate the beetles, the hive can be saved," says Tumlinson. "If they can stop the beetles and remove eggs in the hive, the hive recovers." Honeybe...

Scientists find genes involved in the battle between Hessian flies and wheat

...d can destroy crops worldwide, but the Hessian fly larvae that survive eventually evolve methods to overcome...etoxify wheat anti-insect poisons. "Hessian fly larvae are under stress when they encounter resistant wheat plants," Shukle said. "This stress includes sta...

Smithsonian scientists discover new marine species in eastern Pacific

...do-Pacific, half a world away. "To think that the larvae of Hymenocera picta, a little shrimp we collected on Isla Seca, can survive a journey of more than 3,000 miles from the Indo-Pacific to the coast of Panama is mind blowing!" said Darryl Felder from the University of Louisiana. Felder will use sample...

Wheat can fatally starve insect predators

...attack the stomach lining of a crop-destroying fly larvae so that the bugs starve to death. The gene's rol...ohydrate structure, known as a chitin. When the larvae attack a resistant plant, the plant's lectin production quickly increases by as much as 3,000 times....

Long-lived deep-sea fishes imperiled by technology, overfishing

... things we need to know more about is how the fish larvae get transported," Heppell said. "We don't know whe...rent seamounts are genetically distinct or whether larvae from one seamount end up populating another. The odds against these fish are so high that, in a repr...

Stanford scientists make major breakthrough in regenerative medicine

...sely related to any of these organisms. Sea squirt larvae have primitive spinal cords, distinguishing them in the greater chain of life and on the evolutionary ladder. Specifically, sea squirts, like humans, belong to a group of animals called chordates (organisms with some level of spinal cord development)...

Salamanders suffer delayed effects of common herbicide

...Kentucky, Lexington, exposed streamside salamander larvae to either 4, 40, or 400 parts per billion of atrazine until metamorphosis, the stage where the water-dwelling salamanders lose their gills and develop lungs that enable them to breathe in air. Scientists then tracked their survival to near reproducti...

Baby fish 'smell their way home'

... so after hatching." The team exposed tiny fish larvae in a tank to pure streams of water from four different reefs. To their amazement, within minutes a surprisingly high percentage of baby fish had congregated in the water flow from their home reef. "It was a lot more than you'd expect to happen by...

Unique gene regulation gives chilly bugs survival advantage at bottom of the world

The larvae of Antarctic midges never stop producing special p...ent," he said. This mechanism seems to offer the larvae protection during their two-year life span, most of which is spent encased in ice. All animals, in...

Invasive ants territorial when neighbors are not kin

...nd workforce into collecting resources and raising larvae instead of defending territories, then colonies should grow at a much faster rate." In their native Argentina, aggressive interactions between colonies are much more common and colonies are significantly smaller. When Argentine ants were introduce...

Vanishing beetle horns have surprise function

...the scientists destroyed the horn tissue of beetle larvae using electrosurgery: minute voltage arcs that per...orn tissue destroyed, the scientists observed most larvae were unable to break the husks of their larval head capsules, resulting in young adult hatchlings wh...

Researchers identify neurons that assign value during learning

...ould be activated simply by illuminating fruit fly larvae with blue light. This tool allowed the researchers...ng neurons are experimentally light-activated, the larvae learn to avoid this odor in a later test, despite the fact that no negative stimulus was presented t...

Rearing an army to save wheat

...ring parasitic wasps that attack wheat stem sawfly larvae that tunnel the interior of developing wheat plants. The team includes entomologists David Weaver, master's graduate Godshen Pallipparambil-Robert and undergraduate Melissa Frazier of Kalispell. Pallipparambil-Robert's work, as part of his complet...

Reef warns of sea level rise

... the results of the Leeuwin current bringing coral larvae down from Indonesia and northern Australia over many tens of thousands of years. Together these reefs indicate what occurred during the last big sea level rise. "At the time when this reef grew we know that atmospheric CO2 levels were high, climate...

Some butterflies travel farther, reproduce faster

...od and provide a hospitable home for the butterfly larvae to spend the winter. There are about 4,000 such pa...ulations, Fescemyer said. Hanski's group collected larvae from the seven new patches and reared them on host plants in the laboratory, where they moved to the...

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