Tag: "eggs" at biology news
Enticed By A Chemical Tease, Female Beetles Are Rewarded With A Nuptial Gift To Protect The Next Generation
...dators. Without the chemical, fire-colored beetle eggs
would be lunch for other insects. "Protecting the eggs
is clearly to the advantage of both parents," said Thomas Eisner, the Cornell University biologist w...
Asian Beetle, New In This Country, Threatens Brooklyn's Shade Trees
... bark. After beetle emergence, mating occurs, and eggs
are laid in cavities in the bark, chewed out by females and covered 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. Th...
Study Examines How Mechanisms Evolve To Regulate Bee Development
...rs laideggs. But because workers don't mate, their eggs
go unfertilized and theiroffspring are drones. Sons of fast workers again grew up fast, suggesting,Robinson said, that drones and workers have similar control mechanisms intheir brains, even though their functions in bee society are totally different...
Siblicide In Nature: Study Of Galapagos Seabird Finds Death Can Ensure Species Survival
...gly condemn the species to extinction? Why lay two eggs
if the goal was only one child? "Siblicide demands an explanation because its close relatives killing each other," Anderson said. "Getting back to Darwin, the question is how could you maximize long-term reproductive success this way?" He found par...
Selenium Supplements Can Reduce Cancer Rates
...um are meats, fish and cereals; dairy products and eggs
contribute significant amounts. Some nuts can also be high in selenium if they were grown in high-selenium areas. Of the 40 nutrients currently recognized as essential for human nutrition, selenium was the last to be recognized in 1957. A key compon...
Researchers Corral Millions Of Microscopic Membranes
...icles, of membrane material extracted from chicken eggs
into the corrals, which were submerged in saline water. They determined that the vesicles fused to form uniform membrane patches that completely covered the squares but stopped at the borders. These membranes are very thin, about 50 atoms thick. Tech...
Beset By Human Competition, Penguins Must Take Marathon Food Trips To Avoid Starvation, A Researcher Finds
...g trips come when the female is incubating her two eggs
and is fasting. The first trip for the male is usu...itch nest-sitting duties every other day until the eggs
hatch. For the first 30 days of the chicks' life, each parent will be gone for no more than 36 hours...
Two Parasitic Wasps Show Promise For Controlling Pest Flies
...asps. As in themovie "Alien," the wasps lay their eggs
inside a host, in thiscase within a fly pupa, killing the host from within. The egg hatches andthe parasite larva feeds on the dead fly's pupa before emerging as an adultabout a month later. Spalangia endius wasps, although rare or absent in simi...
First Salmonella Vaccine For Poultry To Be On The Market Soon
...lla. The immunity is transferred to offspring and eggs
that people consume. The vaccine is in its final ...ned by salmonella annually. Consuming undercooked eggs
and raw eggs
used in dressings and condiments are the most common avenues of infection. But the bact...
Newly Discovered Human Protein Provides Important Target For Cancer Therapy
...omosomes in reproductive cells (cells that produce eggs
and sperm)and in certain immature progenitor cells that give rise to other body tissues. Telomerase activity is not detectable in most mature cells. Switching off telomerase during development can be likened to setting astopwatch. This stop...
Oaks' Defenses Help Gypsy Moth Caterpillar Fend Off Virus
...nins slow caterpillar growth, reduce the number of eggs
and lead to lesssuccessful young. The trees' response should be inhibiting the caterpillar, butit takes much more virus to kill the caterpillars when they are eating tannins.The oak trees' defense -- tannin -- actually lets the gypsy moth caterpillar...
A New Biochemical Link Established Between Stress, Sex And Dominance
...ing rights to entice breeding females to lay their eggs
in a sheltered nook within his territory. Only ter... said, was the fact that no females elected to lay eggs
during this period of social instability....
Purdue Research Shows Omega-3S Benefit Bone
...als' diets, according to Watkins. Omega-3-enriched eggs
already are available in Canada, Australia and the southwestern United States....
UF Researcher Designs Pill To Control Mosquitoes
...estion, making it impossible for them to feed, lay eggs
or survive. As a mosquito control breakthrough, th...n we found that the reason they were not producing eggs
was because they were not digesting, so then we knew we had a diet pill, not a birth control pill. "...
UMass Researchers Announce Birth Of Genetically Modified Cloned Calves
...ls are then grown in a petri dish and fused to cow eggs
in which the original genetic material has been removed. The resulting embryos are implanted in surrogate mothers. The resulting offspring, all of one sex, will be identical to one another and carry the same genetic information. The first cloned anim...
Handfish Steps Back From Brink Of Extinction
...apacity, the female laying only 80-100 very large eggs
which are held together by threads and generally attached to the seafloor. The female guards the egg mass which takes 2-3 months to hatch and is thus highly susceptible to disturbance or predators. Mr Bruce said the research team had, for the...
Scientists Work To Restore Native Fish And Habitat To Great Lakes
...r progress in Lakes Michigan and Huron by stocking eggs
and small fish on reefs that are believed formerly to have been the source of native lake trout in these waters. Brook trout restoration activities in Lakes Superior and Huron, and lake sturgeon restoration efforts in waters across the Great Lakes ...
Corn Rootworm Changing Behavior, Posing New Threat To Crops
...rootworms have changed their behavior,laying their eggs
in soybean fields instead of corn. The conclusion...in that circumventscrop rotation. By laying their eggs
in soybean fields, the female rootwormbeetles ensure the survival of their larvae in the subsequent ...
At Life's Most Sensitive Stage, Embryos Cope With Stress
...Perhaps the female snail can sense when to lay the eggs
so as toreduce mortality of her progeny," Hofmann ...e sun,thanks to a thinning ozone layer. When frog eggs
are exposed to ultraviolet-B radiation, the light damages theembryos1 DNA. The damage can cause muta...
Females' Siren Song Initiates Courtship Duets In African Frogs, Columbia Biologists Find
...research by Columbia Universitybiologists. As her eggs
become ready to fertilize, she begins a clicking s...there is a span of only about 24hours in which her eggs
are ready to receive sperm. She must attract a suitorduring that period, or lose her progeny. Mati...
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