Tag: "wasps" at biology news

Spiteful soldiers and sex ratio conflict among parasitoid wasps

...erile 'soldier' larvae in polyembryonic parasitoid wasps has been controversial. Traditionally, these have ...ains, "We found that the bizarre genetics of these wasps means that brothers value their sisters more than sisters value their brothers, and so if sterile la...

NYU scientists identify how development of different species uses same genes with distinct features

... The research teams results showed that flies and wasps employ most of the same genes and similar interact...r, bicoid is unique to flies and does not exist in wasps or other species: The studys findings show that it takes several mRNAs localized in the egg to achie...

New study rewrites evolutionary history of vespid wasps

...linois have conducted a genetic analysis of vespid wasps that revises the vespid family tree and challenges long-held views about how the wasps social behaviors evolved. In the study, published in the Feb. 21 Proceedings of the National Acad...

Two studies on bee evolution reveal surprises

... wasp traits suggests an evolutionary link between wasps and bees. In a related study, published in the Oct. 10 issue of the Proceedings of the National Academy of Sciences, Danforth and several colleagues from other institutions examined early bees' structures in combination with bee DNA, producing the l...

Why do some queen bees eat their worker bee's eggs?

...ction theory. His hypothesis was that worker bees, wasps and ants do not reproduce because most workers are half sisters. Instead the workers favor the queen's male progeny, since she has mated with multiple males, ensuring variation in the species. According to this theory, a species where the mother quee...

Chemical exchanges show wasps are bad losers

...nto insect behaviour but could also help us to use wasps to kill crop destroying pests. For the first tim...s great potential for applied spin-offs: "Bethylid wasps kill the larvae of many insects that are pests of crops, such as almonds, coffee and coconut, ruinin...

Brain, behavior may have changed as social insect colonies evolved

...l cloud forest near Monteverde, Costa Rica. These wasps live in colonies ranging in size from a handful to several dozen individuals where the division of labor is governed by aggression. The researchers examined an area of the insects' brain called the mushroom bodies. There is one mushroom body on top...

New genetic analysis forces re-draw of insect family tree

...example, social colonies are common among bees and wasps and their relatives, ants, as well as among more d...mes independently. "Now that we know that bees, wasps and ants are in fact the closest relatives to the more distantly related (or 'basal') species, it ap...

Rearing an army to save wheat

...wo-year study that involved mass-rearing parasitic wasps that attack wheat stem sawfly larvae that tunnel t...r as honey water increases the number of parasitic wasps produced in each cage. Another part of his thesis project examined whether using special ultraviolet...

Tight-knit family: Even microbes favor their own kin

...ls be they chimpanzees, ground squirrels or paper wasps and because kin recognition can strongly influence cooperative behaviors it can also significantly impact the social evolution of species. While scientists have repeatedly documented cases of kin recognition, the Rice study is among the first to d...

Gene breakthrough heralds better prospect for malaria solution

...s are turned into females, and infected parasitic wasps give birth without reproducing. These reproductive effects are what made Wolbachia so fascinating to biologists in the first place and now they may also provide new ways of tackling insect-bourne diseases such as malaria. ...

Viral hitchhiker inhibits Wolbachia bacteria's ability to proliferate

...with reduced bacterial growth. Then they bred the wasps and confirmed fewer incidences of cytoplasmic incompatibility in relation to the reduced presence of the bacteria and increased presence of the virus. "We're excited about these findings because there is a great deal of interest in deciphering the ...

Plants tell caterpillars when it's safe to forage

...atile compounds that act as a magnet for parasitic wasps ( Cotesia marginiventris ), which deposit their eg... volatile chemicals increases during the day (when wasps are active) and decreases at night, suggesting that variations in production might affect the daily ...

Wasps queue for top job

...iversity College London) have discovered that even wasps are driven by their status. The study, published today in Nature, shows that lower-ranked female wasps work harder to help their queen than those higher up the chain because they have less to lose, and c...

Copying nature could save us energy, study shows

...the way desert cockroaches gather water to the way wasps bore a hole into a tree, nature has developed a myriad of ways of solving difficult problems. "By better understanding the way in which biology defines and solves technical problems, we can develop new approaches that could significantly reduce our d...

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

...opment of centrosomes in the eggs of two parasitic wasps (Nasonia vitripennis and Muscidifurax uniraptor). Using fluorescently labeled antibodies that recognize and bind to gamma tubulin and other centrosomal proteins, they demonstrated the presence of these proteins in accessory nuclei and showed that the...

Mutation in a single gene switches a fungus-grass symbiosis from mutualistic to antagonistic

...s that protect plants from herbivores, and the fig wasps that pollinate fig trees by depositing their eggs in the fig flowers, which their larvae then feed on. Plants participate in numerous symbiotic associations. Examples include the nitrogen-fixing bacteria that live in plant roots, the fungus-alga as...

Sociality of sweat bees evolved simultaneously during climate change

...er and sweat (halictid) bees, ants, termites, many wasps as well as certain kinds of shrimp and the naked m...ther social insects (such as ants, termites, paper wasps and honey bees) have reached 'a point of no return' in social evolution in which members of the line...

Study explores why some individuals sacrifice to help others reproduce

... However, in a study across four species of paper wasps long considered one of the best examples supporti... "[We] propose an alternative explanation in which wasps seek to cooperate with close kin, but less related groups sometimes form due to recognition errors."...

New possibilities to fight pests with biological means

... known as the Egyptian cotton leaf worm. Parasitic wasps use these plant scents to localize the caterpillar...mpounds that are released by the plant and attract wasps toward the damaged corn plant. Since this mechanism is based only on a single gene, it might be usef...

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