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Larva in Biological News

A bee's future as queen or worker may rest with parasitic fly

... or chambers, prepared by the bees, each to hold a larva and pollen that the larva eats. The cells are then sealed, so if a cell ... eggs the young flies are competing with the bee larva for a limited amount of food. "There is a ...

Sand dollar larvae use cloning to 'make change,' confound predators

... case, the cloning process resulted in a small new larva and the original larva substantially smaller than it had been. The ... "From their perspective, if both the original larva and the clone survive that's great then there ...

UCR-led research team uses tiny wasp to wipe out major agricultural pest in Tahiti

... hole in the egg through which the parasite lays its own egg. The wasp larva that hatches from the egg then eats the inside of the glassy-winged sharpshooter egg, killing it. The wasp larva completes its development inside the host egg and then emerges as a tiny ...

New light trap captures larval stage of new species; DNA barcode technology used

... used a new biochemical technique known as barcoding to match DNA from the larva to an adult fish Victor himself stumbled upon a quarter of a century ... a unique, searchable DNA barcode. DNA barcoding allowed me to match the larva to the ... prove to the other fish biologists that this was a ...

The life histories of the earliest land animals

... which meant that the terrestrial Ichthyostega , but not the aquatic Acanthostega , needed to undergo a lifestyle transformation as it grew from larva to adult," says Per Ahlberg. ...

Host shift triggers cascading effect on ecosystem, research finds

... (maggots), which later leave the fruit to pupate and overwinter in the soil. The parasitic wasp D. alloeum lays its eggs directly into the larva of the apple maggot as it feeds inside the fruit. The developing wasp eats the maggot and emerges the following year from its pupa. ...

Flies may reveal evolutionary step to live birth

... who led the project. "When I went and actually looked at them I saw that they were depositing something that was very advanced, that hatched into a larva right away. In several cases they were hatching as they were being laid." Even those Seychelles fly eggs that emerged unhatched were at an ...

Uncovering secrets of life in the ocean

... still lives in the same environment as its ancestors millions of years ago and has preserved many ancestral features. Studying the eyespots of its larva is probably the closest we can get to figuring out what eyes looked like when they first evolved." It is likely that the close coupling of light ...

Caste in the colony

... Chris R. Smith of the University of Illinois. Although genetic factors contribute to what caste an individual becomes, the environment of the larva is controlled by the workers. Quite generally, ant colonies are supreme examples of both conflict and cooperation each extreme of the nature-nurture ...

New fossil tells twisted tale of how flatfishes ended up with two eyes on one side of head

... head. What is even more remarkable is that every flatfish is born symmetrical, with one eye on each side of its skull. However, as it develops from a larva to a juvenile, it undergoes a metamorphosis where one eye moves (or "migrates") gradually up and over the top of the head, coming to rest in its ...

Fruit fly avoidance mechanism could lead to new ways to control pain in humans

... the University of Georgia has discovered for the first time that the important developmental switch from food attraction to aversion in the fruit fly larva is controlled by a timing mechanism in the brain and its sensory system. The study shows how this important avoidance mechanism has been recruited ...

Ants and avalanches: Insects on coffee plants follow widespread natural tendency

... of another insect with a sinister name: the decapitating fly. The parasitic fly lays its egg on the thorax of an ant; the egg hatches and the fly larva migrates into the ant's head capsule where it feasts on the contents. Then the ant's head falls off and the new adult fly emerges. Unfortunately for ...

How baby fish find a home

... black void with little or no frame of reference to navigate. The OWNFOR system is deployed at sea and drifts while videotaping the movement of a larva placed within a clear, circular arena. It will also be possible to change their immediate environment and manipulate orientation cues, such as ...

Old developmental pathways spawn revolutionary evolutionary changes

... for caste fate was the ancestral protein kinase TOR (target of rapamycin), which had become the transducer of the signal determining if a honey bee larva grows to be worker or queen. The fact that workers and queens can emerge from ancestral pathways in both complex and more primitive social insects ...

Butterflies lose body fat during metamorphosis

... metamorphosis to occur. It appears as though the larva is sleeping, and one might think that very little ... They were able to do this easily because the larva feed solely on the leaves of the rain forest tree ... basis, they measured the food consumption of the larva and then analyzed the fatty acid composition and ...

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

... begin metamorphosis ?maturation from an immature larva to a sexually active adult. It is the first ... into a first-stage larva. At 48 hours, the larva molts ?sheds the cuticle that forms its external ... ?and becomes a second-stage larva. The larva molts again at 72 hours to become a third-stage ...

Scientists find a maturity gene in fly

... begin metamorphosis ?maturation from an immature larva to a sexually active adult. It is the first ... into a first-stage larva. At 48 hours, the larva molts ?sheds the cuticle that forms its external ... ?and becomes a second-stage larva. The larva molts again at 72 hours to become a third-stage ...

For many insects, winter survival is in the genes

... flesh fly's dormant state. The researchers extracted and compared RNA from both dormant and non-dormant fly pupae – the developmental stage between larva and adulthood. They used a laboratory technique that let them separate out genes that were turned on only in the flies in this dormant state. ...

Researchers identify neurons that assign value during learning

... become repulsive. Conversely, an odor associated with a reward can become attractive. Despite its relatively modest brain complexity, the fruit fly larva is able to perform such associative-learning tasks. Because of its neuronal simplicity and the fact that it can be genetically manipulated, the fruit ...

New research finds surveys of larval-stage organisms effective for measuring marine biodiversity

... we know a particular area. There may be parts of the world that we think we know a lot about, like the Caribbean for example, but the sequencing of larva there may uncover countless more species that we never knew existed." In addition to an alternative way to explore marine biodiversity, Barber ...

Study finds how organs monitor themselves during early development

... regenerative powers and others will differentiate into eggs. Signals, sensors, feedback A fruit fly takes ten days to go from embryo to larva to pupa to flying insect. The researchers looked at a larval development phase during which the ovary grows remarkably fast. In three days the number ...

Gene needed for butterfly transformation also key for insects like grasshoppers

... like metamorphosis evolved in insects by restricting the expression of the broad gene to a short but intense period of change at the transition from larva to pupa." Normally an insect like the grasshopper that does not undergo complete metamorphosis goes through subtle physical changes during each of ...

Stealth Worms May Improve Insect Pest Control

... such as the pockets behind the bark of trees, the juvenile nematode waits for (or sometimes actively seeks) an unsuspecting host - a grub or a larva - to jump on it and penetrate it through the insect's natural openings - mouth, anus, spiracles. Or the nematode may enter the host directly by using ...
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