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Tag: "larvae" at biology news

Queen bee promiscuity boosts hive health

... of the highly virulent bacterium that infects bee larvae and causes the disease American Foulbrood. Sure enough, the more genetically diverse colonies derived from multiple fathers were significantly less affected by the disease several months later. The findings have implications for beekeepers, whose...

For crickets, parasitic flies can stop the music

...parasitic flies. The uninvited guests then deposit larvae that burrow into their amorous hosts, grow for abo...s, known scientifically as Ormia ochracea, deposit larvae on, or near, singing crickets. The larvae burrow into the insects, then feed on nonessential organs ...

Commercial fishing causes dangerous fluctuations in fish populations

...uch are wholly reliant on the successful growth of larvae into baby fish (recruits) to maintain population numbers year on year. Professor John Beddington from Imperial College London's Division of Biology, who worked on the study, explained: "Intensive fishing makes populations vulnerable because if the...

Living laboratory found on shoreline statues

...ttled, the barnacle can produce multiple broods of larvae ?increasing its local population size several times in a year." Funded by the British Ecological Society (BES), the team are also analysing DNA taken from the settlement to find out where the barnacles have travelled from in addition to assessin...

Ocean temperature predicts spread of marine species

Scientists can predict how the distance marine larvae travel varies with ocean temperature ?a key compon...ing commercially important species, reproduces via larvae that drift far along ocean currents before returning to join adult populations. The distance larvae ...

Fire ant-attacking fly spreading rapidly in Texas

...rol invasive fire ants without pesticides. The fly larvae develop inside the ants and kill their host. Dr....ving food, having mating flights or rescuing their larvae after mounds become disturbed by animals such as armadillos during the day. "It's not just becau...

Tweedle coat fashions stocky flies

...efective TweedleD protein in the outer coat of fly larvae makes them appear compressed. "It's not a triv...cle. Make one part too weak or too strong and the larvae end up resembling their namesake. Tweedles may be good targets for novel insecticides, the re...

A new view on Lyme disease: Rodents hold the key to annual risk

...e best indicators of disease risk. I. scapularis larvae hatch in midsummer and acquire infection after feeding on an infected mouse or other small animal. Larvae detach after several days of feeding, then molt into nymphs and enter a nearly year-long dormant stage. After another round of feeding, nymphs f...

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

...e DNA sequences of a random sampling of stomatopod larvae to a sequence database of most known mature specie... organisms have a developmental phase where minute larvae disperse on ocean currents. "For some groups of organisms, scientists can more easily collect larv...

Global warming may have damaged coral reefs forever

...tive isolation. A lack of nearby reefs to provide larvae which could settle and grow into new coral structu...bsence of favourable sea currents to transport the larvae could be largely to blame. Yet while a bleak picture is painted in the inner islands of the Seyche...

Plants tell caterpillars when it's safe to forage

... can indeed regulate herbivore behavior. When the larvae of beet armyworms ( Spodoptera exigua ) feed on co... To test this hypothesis, Shiojiri et al. exposed larvae of a corn-munching nocturnal caterpillar, Mythimna separata , to volatile compounds from corn and v...

Time of day tempers tadpoles' response to predators

...see whether their responses to predatory dragonfly larvae differed with time of day. "Green frog tadpoles,... in a tank to the chemical signatures of dragonfly larvae for one hour during the day and one hour at night. Then he recorded their swimming and feeding activ...

Researchers discover which organs in Antarctic fish produce antifreeze

...d strong pancreas expression in newly hatched fish larvae and young juveniles. The exocrine pancreas is the larger of the two parts that make up the pancreas. It consists of tubuloacinar glands that primarily manufacture and secrete digestive enzymes that break down food in the intestine so it can be absor...

Primates take weather into account when searching for fruits

...nown to accelerate maturation of fruits and insect larvae inside them. The researchers were able to show that past weather conditions--as opposed to sensory cues such as the smell of ripe fruit--accounted for the behavioral trend they observed. These findings are consistent with the idea that monkeys make ...

Giant deep-sea tubeworm's meal ticket comes in as a skin infection

...up in which they both thrive. But the microscopic larvae of these giantsare born bacteria-free, with a comp...ith their microbial partners. Nowthe idea that the larvae acquire theirsymbionts by eating them has beenoverturned. By collecting the giant worms'tiny spawn f...

On the track of tiny larvae, a new model elucidates connections in marine ecology

...geographically separate populations. Although tiny larvae are impossible to follow directly, advances in mod...s and thereby hone our understanding of how marine larvae disperse in the environment and influence the structure of adult populations. In their study, the re...

Study finds how organs monitor themselves during early development

...00 cells. The scientists started by looking at larvae with defects that cause them to have too few germ cells. The animal could well mature with this defect and suffer from reduced fertility. But it does not. Instead, they found that the ovary has a way to sense its lack of germ cells and steps up produ...

Even fish don't swim well when they're young!

...sh must be born as expert swimmers. Actually, fish larvae are pretty feeble when it comes to an efficient mo...Wageningen University studies how fish swim: "Fish larvae are the most critical life history stage. In marine fish more than 99% of the mortality occurs in th...

Vital ocean prey play active role in environment

...embryos sink. The embryos hatch into free-swimming larvae at depth, then swim upward over the course of several weeks. The larvae are at this stage dependent on microorganisms found on the underside of sea ice for food, and as the...

Thin tough skin, slow-growing gills protect larval Antarctic fish

...hile each species spawned at different depths, all larvae swam upward into platelet ice, located just below ...ff how we understand survival in fish." While the larvae of one species, the bald notothen, survives using high levels of AFPs like the adults, the researche...

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