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Tag: "larvae" at biology news

CU, USDA team to curb two invasive, poisonous vines

... The plants are lethal hosts for monarch butterfly larvae and alter ground cover and affect habitat for gras...The monarchs lay their eggs on milkweed, and their larvae eat it as a primary food. Studies have shown that when the monarchs lay their eggs on pale or black ...

Embryos tell story of Earth's earliest animals

...e, embryos degraded quickly. Likewise, soft-bodied larvae that hatch from the egg-like fertilization envelope did not fossilize, even under reducing conditions. The scientists predict early animal fossils from 500 million years ago will be embryos encased in the fertilization envelope and will have been f...

UCSD study finds anthrax toxins also harmful to fruit flies

...plied lethal factor toxin to fruit fly embryos and larvae and observed that a component of the expected sign.... The EF toxin is also lethal when applied to fly larvae and can cause severe malformation in the wings of adult fruit flies--an effect that can also be unde...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

...ical attractant, or pheromone, released by lamprey larvae living in streambeds. Following the pheromone trai...ls lamprey by means of a poison that kills lamprey larvae in streambeds. It also kills every invertebrate it comes in contact with, and sometimes fish. The la...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

...ical attractant, or pheromone, released by lamprey larvae living in streambeds. Following the pheromone trai...ls lamprey by means of a poison that kills lamprey larvae in streambeds. It also kills every invertebrate it comes in contact with, and sometimes fish. The la...

How Fruitflies Know It's Time for Lunch

...s, Melcher and Pankratz discovered that mutant fly larvae overexpress the hug gene, which is known to encode...which signals influence hug expression by exposing larvae to either high or low food levels. Because both starved and sugar-fed flies express little hug, the ...

New GM mosquito sexing technique is step towards malaria control, report scientists

... the malaria in Asia. They engineered the mosquito larvae to express an enhanced green fluorescent protein (EGFP). The modified larvae were mixed with normal larvae, and the researchers were able to identify the modified male mosquitoe...

Deep treasure to be found in Oculina Bank

... makes them a potentially important source of fish larvae for the entire southeast U.S. continental shelf. Harbor Branch Oceanographic Institution scientists first discovered the deepwater Oculina reefs with the Johnson-Sea-Link submersibles in 1975. John Reed, a Harbor Branch coral expert and expedition ...

Oysters: The natural way to protect our shores

...o overall ecosystem stability and quality. Oyster larvae move in groups and water-borne chemicals stimulate the oysters' settlement; reefs are therefore able to maintain themselves as new recruits settle and grow. "Sustainability is an important component to note as maintenance requirements would likely b...

Researchers find gland that tells fruit flies when to stop growing

...d's growth by decreasing insulin signaling allowed larvae to grow larger than usual before entering the pupa...it flies to begin metamorphosis, and examined when larvae with enlarged prothoracic glands reached that weight compared with normal larvae. This was done by s...

UF study first to quantify validity of DNA I.D. tool using marine snails

...said. "A border guard may come across some eggs or larvae in an orange shipment and wonder if they are from a dangerous fruit fly or something else to be concerned about," he said. For that matter, this ability to detect species in earlier stages of development could benefit ecologists in their work as wel...

Biologist Discovers What May Be World’s ‘Pickiest?Mates

...?she said. “A burrow of just the right size allows larvae to hatch at the safest time, the peak outward nigh...> “Wide burrows speed incubation, so cause the larvae to hatch too early and miss the peak tides. This research provides one of the first examples of how ...

Emerald Spectre haunts Ontario's ash forests

...t beetles lay eggs under tree bark and the feeding larvae kill trees by disrupting the flow of nutrients in the soft tissues under the bark. The new study funded by the Natural Sciences and Engineering Research Council of Canada (NSERC) reveals that unprecedented actions taken to stop the borer's spread ha...

Elusive salamanders have role in developing new sampling models

...ebruary. Larval development lasts through May. The larvae then undergo metamorphosis and leave the ponds as terrestrial juveniles. Juvenile and adult salamanders may move 400 or more yards from ponds and burrow in old crayfish holes and other crevices in soggy pine flatwoods. This research is important to ...

Drugs from the deep blue

...eased into the seawater as pheromones to encourage larvae to join an existing colony, or to attract a mate. Molinski's group is collaborating with Jay Stachowicz, assistant professor in the UC Davis Section of Evolution and Ecology and his graduate student, Amy Larson, at the Bodega Marine Laboratory, and ...

miRNAs and musculature

...ath of Dmir-1 KO larvae. Analysis of the mutant larvae after feeding reveals disrupted somatic musculature, strongly suggesting a role for Dmir-1 in the maintenance of muscle integrity and identity in times of stress induced by growth. Dr. Sokol proposes that "Mir-1 could function generally to maintain ...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...m juvenile to adult. If the gene was crippled, fly larvae started metamorphosis too soon, and became prepupa...al stages end. When the gene was disabled, the fly larvae started metamorphosis but died within 12 hours. In some, their heads failed to emerge from their bod...

Scientists find a maturity gene in fly

...m juvenile to adult. If the gene was crippled, fly larvae started metamorphosis too soon, and became prepupa...al stages end. When the gene was disabled, the fly larvae started metamorphosis but died within 12 hours. In some, their heads failed to emerge from their bod...

Acid water in East Java threatens biodiversity and local welfare

...ained normal aquatic fauna, but that only mosquito larvae could survive the extremely acidic water. The diversity of microorganisms and algae was also very low. The inhibited breakdown of organic material was another ecological effect measured. Lohr established this using packs containing jati and bamboo le...

Hanging baskets of sex and death help fruit growers

...tively target the pest with a virus that kills its larvae without killing other beneficial insects. The res... style dispenser full of a virus known to kill the larvae of codling moth. The dispenser is designed to protect the virus from the elements and also includes ...

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