Tag: "colonies" at biology news
Commandeering cellular machinery: recognition mechanism to detect small molecules
...uclear receptors for the LG335. To verify that the colonies
were growing in response to LG335 and not some oth...other petri plate that did not contain LG335. Any colonies
that grew there were discarded. From their initial 380,000 candidates, the researchers ended up wit...
Fungus knocks a frog down but not out, raising questions about amphibian declines
...lensis populations crashed but survived in remnant colonies
totaling about five percent of the original population. The decline was not directly observed, but the remaining populations were studied in the mid-1990's and appeared to have stabilized. Frog toes taken to identify and study individual frogs were l...
Biologists ID molecular block for social 'cheaters'
... from exploiting their neighbors within slime mold colonies
that are formed by the social amoeba Dictyostelium...logy and evolutionary biology at Rice. "We created colonies
that contained roughly a 50-50 mix of our mutants and wild type strains of Dictyostelium, As expecte...
UF scientists have bionanotechnology recipe to find elusive bacteria
...e the sample in a Petri dish and let the bacterial colonies
grow for one to a few days before analysis. However, the bioconjugated nanoparticles found a single E. coli bacterium in a sample of ground beef in less than 20 minutes, from start to finish. A quicker analysis time is not only vital for early disea...
Genetically endowed worm may substitute for rodents in some toxicology testing
...lly dispense hot agar gel to support the bacterial colonies
the worms use as food. After the agar cools and solidifies in the sunken wells where the animals will live, machines add drops of bacteria. Robots also measure out chemicals at various levels of dilution and place those in the wells. Me...
Sea change: Skeletons of ancient corals different from today's
... these mixtures went coral fragments replete with colonies
of polyps -- tiny animals, a few millimeters in size, from which larger corals and, eventually, reefs grow. Ries prepared the polyps for the experiment by having them spend a one-month "adjustment period" in tanks filled with modern seawater. Gradual...
New Royal Society journal studies
...n and worker policing in monogynous and monandrous colonies
of a primitively eusocial wasp by Dr T Saigo and D...ly predicts that workers prefer to produce sons in colonies
headed by a once-mated queen. Using behavioural observation and genetic method, we evaluated the fat...
Invasive sea squirt alive and well on Georges Bank
...ABOSS) documented the distribution of the tunicate colonies
in water depths of 42 to 65 meters (138 to 213 fee...s to form new colonies. By contrast, fragments of colonies
are long-lived. Controlled experiments in Cape Cod waters by USGS and Woods Hole Oceanographic Inst...
Injured whooping crane recovering at USGS Patuxent Wildlife Research Center
...rane Foundation and the Calgary Zoo, have breeding colonies
that originated at Patuxent. Whooping cranes, native only to North America, are protected as an endangered species. Biologists believe that they numbered fewer than 20 individuals at their low point in the 1940s. This striking, 5-foot-tall white ...
Global warming good news for coral reefs: research
...perature relationship at significant reef-building colonies
around the world in the Indo-Pacific and at massive Porites reef colonies
in Australia, Hawaii, Thailand, the Persian Gulf and New Ireland. The predicted increase in ...
Study by US, Hebrew University scientists sheds light on how bacteria persist despite antibiotics
...biotic-tolerant "persistent cells" within bacteria colonies
and have shown, through mathematical modeling, how these cells develop into "normal" cells following their survival of even heavy dosages of antibiotics. The findings have consequences for development of new tactics for overcoming the common problem...
Baby songbirds and human infants learn sounds in similar ways
...ebra finches are highly social birds that breed in colonies
of up to several hundred pairs. A young bird learns its song by imitating his father or other adult males, often copying different parts of the song from different adults. Liu observed the birds and recorded them on tape, at first every other or eve...
Ants' 'genetic engineering' leads to species interdependency
...ve become so specialized for raiding food from the colonies
of other ants that they can no longer feed themsel...thern New Mexico, queens and workers from the same colonies
are genetically very different; in both species at the site, only the queens are genetically derived...
Highlights of January 2005 issue of Biology of Reproduction
...neo to allow drug selection of modified cells. The colonies
derived from single modified and selected GS cells were expanded and then injected into seminiferous tubules of germ cell-free mutant mice. After mating, these mice produced offspring that not only expressed the introduced EGFP construct but also pas...
The giant eagle of Middle Earth
...moa "poop" and from soil in former petrel breeding colonies
is currently underway. ...
Unusual reproductive behavior of odd ants surprises scientists
...sing and his colleagues found some genetically odd colonies
of harvester ants (Pogonomyrmex), that don't seem ..." Rissing said. "It seems that the queens in these colonies
mate with males from two different genetic lineages. And when a queen and male with the same lineage...
Study in Royal Society journal on managing GM crops for environmental benefit
... is why females mate with several males. Bumblebee colonies
would benefit from queens mating multiply because genetically heterogeneous worker offspring are better protected against parasitism. However, as we show, possessing sperm from several males can have negative effects on females. We artificially insem...
New species of coral discovered off southern California
...m NOAA Fisheries, "is that these spectacular large colonies
have managed to go unnoticed while living in the backyard of the largest urban area on the West Coast."...
Technological revolutions in sensors, robotics, and telecommunications allow new views of ocean
...Corals" live 100-225 meters under the sea in bushy colonies
of pink, white, and red. The scientists suspect t...ed," says Yoklavich. "And these are not just tiny colonies
these are 8 foot tall trees, sometimes 10-20 feet wide." Scientists first viewed the corals while d...
Insects, viruses could hold key for better human teamwork in disasters
...pagate alarms and the interactions produced in ant colonies
can be used to model complex systems and cascading effects," Robinson said....
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