Tag: "larvae" at biology news

Asian Beetle, New In This Country, Threatens Brooklyn's Shade Trees

...red with a cement secretion. Eggs hatch and young larvae bore into the inner bark, feed for awhile, and upon growing larger, bore into the tree's heartwood and pupate in the spring. The adult beetle then chews its way out, thus leaving the hole. Larval feeding could hurt a tree's vascular system in an are...

New understanding of crab populations may not bring fishermen's delight

...rabs for 22 years, most recently exploringhow crab larvae are transported in the plankton by ocean currents duringthe spring upwelling in the ocean current when winds come from the north. "This model says the population would be constant if it wasn't constantlyperturbed by environmental changes from year t...

Enhancin Protein Attacks Insect Immune System

...rate intestinal mucin gene from the cabbage looper larvae (Trichoplusia ni). The researchers looked at seven types of pests and found their method to be effective against the fall armyworm, beet armyworm, the cotton bollworm, the American budworm, the velvetbean caterpillar and the common armyworm. In th...

Summer Science: Firefly Babies Advertise Their Bitter Taste, UD Researchers Say

...pplied ecology, "but thebioluminescence of firefly larvae sends a very different message to would-bepredator...lamynotes, "only anecdotal evidence suggested that larvae are also distasteful." So,mice were offered a choice of either a firefly or a mealworm--a delicacy f...

Pharmaceuticals Manufactured In Insect Larvae

...n harvest the beneficial protein from the infected larvae of lepidoptera -- moths and caterpillars. Genetically engineered baculoviruses, which are viruses shaped like rods, attack the inside of the larvae, initiate a wholesale, metabolic change and kill the insect. "The baculovirus literally turns the in...

Termites' Attraction To Small Amounts Of Carbon Dioxide Lures Pests To Their Deaths

...llets, buried at cornplanting time, steer rootworm larvae off-course. Bjostad's recent discoveries with termites and rootworm points to thepossibility that many soil-borne insects also rely on CO2 to locate food andshelter. If so, the gas could be used to steer other agricultural and householdpests ...

Corn Rootworm Changing Behavior, Posing New Threat To Crops

...emale rootwormbeetles ensure the survival of their larvae in the subsequent year becausethe field will be planted with corn. "Intense selection pressures have produced rootworm beetles thatmove out of corn to lay at least some of their eggs," said entomologistJoseph Spencer of the Illinois Natural History ...

At Life's Most Sensitive Stage, Embryos Cope With Stress

...es of the fly's life cycle, including lateembryos, larvae and adults. However, built into the normal steps for developmentof Drosophila's early embryo is a specific mechanism to prevent expression ofHsp70. This preventer mechanism remains in place only through the most rapidphase of cell division, when the ...

Global Warming Would Foster Spread Of Dengue Fever Into Some Temperate Regions

...ed by freezing temperaturesthat kill overwintering larvae and eggs, so that dengue virus transmission islimited to tropical and subtropical regions. Global warming COULD increase the range of the mosquito. In addition, the time the virus must spend incubating inside the mosquito is shortened at higher temp...

Getting At The Components Of Mechanotransduction: Genes Required For Vertebrate Sensory Hair Cell Function Identified

... cells in live fish. In addition, the transparent larvae are suitable for imaging of neuronal activity within the brain and peripheral nervous system. Localization of the defects to the sensory hair cells or primary neurons in the mutants was achieved by a non-invasive technique of la...

Butterfly Wings, Beetle Horns Teach Biologists Basic Lesson In Development's Laws

...b dung beetles, the researcherstreated male beetle larvae with a hormone known to decrease size of the horns --which grow on the back of their head and which males use for fighting. Theresulting adult male beetles with reduced horn size had correspondingly enlargedcompound eyes. In another set of ...

The First Rejection: Eggs Sequester Bits Of Sperm For Later Elimination

...Karr and Pitnick looked for these pieces after the larvae were allowed to feed for a few hours, they were no longer detectable. Apparently, the larvae excrete the piece with their waste, says Karr, "We were pretty surprised that this segment persisted...

Fish Farmers Must Learn Zebra Mussel Prevention From A To Z

...troduced to the operation. Undetected Zebra mussel larvae could be suspended in the water, Swann says, or the spat could be introduced though surface water supplies. "Zebra mussels also can enter an operation through equipment such as nets, baskets and boots that have been used in infested areas," Swann say...

Tiny Jamaican Tree Crab Made Big And Fast Evolutionary Leap, Scientists Discover

...theonly ones known that actively feed and care for larvae and juveniles during theseveral months they spend in their rainwater nursery. "The mother crabmanipulates water quality by removing debris, by circulating the water to addoxygen to it, and by carrying empty snail shells into the water to buffer the ...

Gene Linked To Glaucoma, Hydrocephalus, And Other Birth Defects

...gene called forkhead, which whenmutated results in larvae whose heads do not develop properly. "We began looking in mice for genes that are related to the fly forkheadgene, and we found a number of them," Hogan said. "There are probably about 50members of this family, but we started focusing on one ...

Native Fish Found In U.S. Lake Ontario For First Time In 50 Years

...to deeper water," said O'Gorman. "Because the larvae of many native fishes, including larvae of the deepwater sculpin, occupy shallow water, these changes have helped reduce predation on t...

Ecological Consequences Of Jasmonate-Induced Responses For Plants In Native Populations

... attack from herbivores (primarily rabbits and the larvae of the tobacco specialist, Manduca sexta).The lifetime production of viable seed was measured from all plants to determine the fitness consequences of jasmonate induction. The results strongly support the cost-benefit model for ...

A 300-Million-Year Old Twosome: The Cycad And Its Pollinator

...ferthe insects food, shelter, a breeding site, and larvae protection. Dr. Stevenson found that in...toxins to make the larvae's cocoon, protecting the larvae frompredators. The next insect generation, covered with pollen, flies from cycad tocycad, staying l...

Paper Wasp Queens Wait To Hijack Or Adopt

...nest shewill eat the former queen's eggs and young larvae and replace them with her owneggs. The older larvae and pupae, which belonged to the former queen, areallowed to complete development and may eventually...

High Carbon Dioxide Levels May Be Killing Insects

...g looked at several species of mining moths, whose larvae tunnelthrough leaves for food. By examining the tu...hind,Stiling and colleagues could tell whether the larvae had died inside the mine,were killed by predators such as spiders or ants, or were eaten from the in...

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