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Tag: "record" at biology news

Fighting like a girl or boy determined by gene in fruit flies

...eotaped. The movies are replayed in slow motion to record each move and countermove. "Ed has systematically developed reproducibly aggressive behavior in flies and paved the way for serious analysis," said Laurie Tompkins, program director at the National Institute of General Medical Sciences, which fund...

HIV exploits competition among T-cells

...ht the disease ?are the ones with the best overall record against the most recogniztable strains. Among the losers, however, there may be T cells that better control the other less recognizable, but still deadly, strains. "Once the immune system chooses a winning set of T cells, it has a natural tendency ...

Boston University biomedical engineers win major grant for pursuit of the '$1,000 Genome'

...er attached to it, which allows the researchers to record the sequence of bases as the strand emerges from the nanopore. Meller has devised a system of lasers and highly sensitive detectors which greatly increase the process' resolution. He is the only researcher in the world using this method, which he nam...

Slow brain waves play key role in coordinating complex activity

... assistant professor in residence of neurology, to record brain activity in brain tumor and epilepsy patients scheduled for surgery to remove a portion of their brains. The epilepsy patients typically have brain activity measured up to a week beforehand so that surgeons can localize important areas they nee...

Small, smaller, smallest -- The plight of the vaquita

...ternatives to fishermen. Mexico has a very good record in helping endangered marine mammals to recover. There are no better examples anywhere in the world than eastern Pacific gray whales and northern elephant seals, both of which came back from low numbers and now represent true conservation success sto...

First Biodiversity Census of coral reef ecosystems in the NW Hawaiian Islands

...plan to provide for the State of Hawaii a baseline record of the diversity of a relatively pristine area in order to have some basic working knowledge of what lives in the NWHI chain. There will never be any way to measure impact on the environment without first knowing what is there" said Dr. Joel Martin,...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...cies Pyrolobus fumarii holds the world temperature record for surviving in waters of 113 C or 235 F, well above the boiling point. ''However, in the early '90s, it was discovered that non-extremophilic archaea were ubiquitous and abundant in the marine environment, but it was unclear exactly how these or...

Teenager moves video icons just by imagination

... Children's Hospital, had a grid atop his brain to record brain surface signals, a brain-machine interface technique that uses electrocorticographic (ECoG) activity - data taken invasively right from the brain surface. It is an alternative to a frequently used technique to study humans called electroencepha...

Two studies on bee evolution reveal surprises

...he oldest bee ever found -- "pushes the bee fossil record back about 35 million years," according to Bryan D... species, it has been a mystery why the bee fossil record only dated back about 65 million years. Until now, many researchers believed the most primitive b...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...ance of cold seep mollusk genera in the geological record is a full epoch earlier than that of marine mollus...nce. Kiel and Little decided to examine the fossil record for modern seep mollusks to see how their history compared to that of the overall marine mollusk pop...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...son, however, warns that the picture of the fossil record at the time of extinction is not resolved enough to say definitively. "We have enough information to say for certain that, within six million years of the meteorite's arrival, dinosaur populations were stable," Dodson said. "But we don't know for ce...

Record ozone loss during 2006 over South Pole

...40 million tons on 2 October 2006 has exceeded the record ozone loss of about 39 million tons for 2000. Oz...le is 28 million square km, nearly as large as the record ozone hole extension during 2000, and the depth of the ozone hole is around 100 Dobson Units, rivall...

Novel experiment documents evolution of genome in near-real time

...ving targets. "Paleontologists look at the fossil record to study how evolution of dinosaurs and other anim...ed genomic sequences of bacteria are like a fossil record and our experiments confirm that these genomes can change quickly as bacteria adapt to new condition...

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...nd had devices ("loggers") surgically implanted to record the animals internal temperatures. Pairs were selected in which the males had sufficient body fuel reserves that would ensure success in their incubating task. After implantation, both mates were individually marked with colored strips and released t...

The great escape -- fleeing fish fall in line

...anical stimulation and used a high speed camera to record responses in schools of ten grey mullet each. Individuals within a school were then ranked according to the timing of their escape. The experiment was performed ten times at 10 minute intervals on a total of seven separate schools of grey mullet. ...

Does evolution select for faster evolvers?

...ear to increase with time. For example, the fossil record indicates that single-celled life first appeared about 3.5 billion years ago, and it then took about 2.5 billion more years for multi-cellular life to evolve. That leaves just a billion years or so for the evolution of the diverse menagerie of plants...

Volcanic eruptions, ancient global warming linked

...warming. "There has been evidence in the marine record of this period of global warming, and evidence in the geologic record of the eruptions at roughly the same time, but until now there has been no direct link between the t...

How fish conquered the ocean

...rway. "To the contrary", Dr Finn says, "the fossil record shows that the ancestors of the bony fishes (teleosts) inhabited fresh water environments for at least 150 million years before they entered the oceans". "Apparently, it was not until the Eocene epoch (about 55 million years ago) that an unparalle...

Genomics throws species definition in question for microbes

...eld should proceed in the future. The report is a record of their comments and recommendations. In the late 1800s, in order to make sense of the vast diversity of microbiological organisms, microbial taxonomists developed a system of placing microorganisms into categories in which each organism was gra...

Fish growth changes enhanced by climate change

...emperatures have been obtained from a 60-year-long record at Maria Island on the Tasmanian east coast, and using 400-year-old deep-ocean corals to measure temperate at depth. Dr Thresher said populations of large marine species are widely subject to two major stressors ?commercial fishing and climate cha...

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