Tag: "southern" at biology news
Resident birds display migratory restlessness
...osed to the natural seasonal light fluctuations of southern
Germany. Helm and Gwinner recorded the birds' nocturnal movements with infrared motion sensors, and counted the number of movements within ten-minute intervals. If 20 or more movements were noted, the interval was considered "active." Even though th...
Earth from Space: Iceberg knocks the block off Drygalski Ice Tongue
...the collision. On 26 March, C-16 was pinned at the southern
edge of the ice tongue but had started migrating by 27 March. The collision on 30 March shows the ice tongue breaking off, and the final image on 1 April captures C-16 and the new iceberg swinging to the other side of the ice tongue. Mark Drinkwater...
Satellite instrument helps tackle mysteries of ozone-eating clouds
...utants like chlorofluorocarbons (CFCs). During the southern
hemisphere winter, temperatures drop to very low levels causing the chemicals in the stratosphere, which is in complete darkness during the winter, to freeze and form PSCs that contain chlorine. Now banned under the Montreal Protocol, CFCs were once...
Green sturgeon receives 'threatened' status
...onal Marine Fisheries Service--only applies to the southern
population, and may fail to protect these fish lea...ave to craft regulations carefully to protect this southern
population of green sturgeon, which are highly migratory and thus vulnerable to threats in Oregon an...
Lion mane linked to climate
... no reduction in their mane is necessary. Those in southern
zoos occasionally overheat, so a differential hair growth rate keeps their manes relatively thinner. These differences in mane conditions are not the result of natural selection. Rather, they are a sign of a flexible trait that can vary to match loc...
Hantavirus found in African wood mouse
... the natural range of the African wood mouse, from southern
Guinea across parts of Sierra Leone, Liberia, and Ivory Coast, to Ghana. This one-to-one pairing of virus with host also means that the Sangassou discovery has implications for rodent classification, said ter Meulen. "According to the co-evolution h...
Ancient DNA provides clues to the evolution of social behavior
...abilis) lives in remote highland savannah areas of southern
Argentina. Unlike the more than 50 other tuco-tuco...ime, the genetic diversity of C. sociabilis in the southern
cave declined precipitously. ''When you talk about genetic variation being lost, you need to really ...
'Banana-jawed' fossil mammal linked to rare sound-producing skill
...raxes now inhabit a swathe from the Middle East to southern
Africa." From previous studies, scientists knew that Thyrohyrax, along with numerous other early hyracoid relatives, had an enlarged opening on the inside of its lower jaws. The feature is known as an internal mandibular fenestra. But knowledge essen...
WWU receives $720,000 for 5-year harbor seal study
...roximately 350 seals, from which I collect scat in southern
Padilla Bay. The sites are only accessible at low tide and, because Padilla Bay is so shallow, I'm using a kayak to reach them." Luxa is working with several undergraduates who help her collect samples. "I will be providing baseline data on harbor se...
The secret lives of sea slugs
...sites near Vargas Island, British Columbia, and in southern
Puget Sound, Wyeth, Willows, and their colleagues used SCUBA and time-lapse videos made with surveillance cameras like those used to catch shoplifters to observe the slugs' secret lives, then described certain behaviors and their relationships to sen...
Scientists discover that ancient genes dictate flowering, fall bud set
...ees from northern latitudes compared to those from southern
latitudes. Because winter arrives earlier at nort... bud and enter dormancy earlier than trees at more southern
latitudes. The article concludes that the CO and FT genetic pathway is key to understanding adaptat...
New strategy developed to combat West Nile Virus
...o create heightened risk of the West Nile Virus in southern
Florida, and they hope to expand their studies to ... similar disease, St. Louis Encephalitis Virus, in southern
Florida. When drought occurs early in the year, the limited water resources confine mosquito populat...
Study provides new understanding of spontaneous hybridization
...n sunflower species that had captured genes from a southern
sunflower species, resulting in a stabilized hybri...texanus, able to expand southward into central and southern
Texas. They then recreated the original hybridization event by manually crossing two parent species....
Global team of scientists describes new genus of African monkey: First in 83 years
...scovery also reinforces the view that mountains in southern
Tanzania have played an important and until recently unexpected role as a refuge for many species long extinct elsewhere." This global collaboration reflects the speed and value of the new phenomenon of conducting research across many time zones. ...
UAB researchers confirm HIV-1 originated in wild chimpanzees
...h the team has found in wild-living chimpanzees in southern
Cameroon. The findings provide important clues to how the disease migrated from non-human to human primates, and will be released Thursday (May 25) in ScienceExpress [ http://www.sciencemag.org/sciencexpress/recent.dtl ] and will be published in an u...
Iraq's marshes show progress toward recovery
...d over the past two years in four large marshes in southern
Iraq, note that water inflow from the Tigris and E... hunting--tens of thousands of Marsh Arabs fled to southern
Iran. US scientists undertook a first assessment of the status of the marshes in June 2003. They fo...
Damaged Iraq marshes show renewed signs of life
The marshes of southern
Iraq, devastated in recent decades by Saddam Husse...hing, herding water buffalo and hunting -- fled to southern
Iran. When Richardson made his first trip to evaluate the marshes shortly after Hussein's downfall, ...
Researchers offer new insights on arid, semiarid landscapes
...earch Service at the Jornada Experimental Range in southern
New Mexico, the team of USDA and New Mexico State University researchers published their findings in the June 2006 issue of BioScience. The article is titled "Disentangling Complex Landscapes: New Insights Into Arid and Semiarid System Dynamics." Alm...
Same species responds differently to same warming, depending on location
...e important in driving mussel temperature while in southern
California, water temperature is the more important factor. "This is an important consideration for conservation biologists trying to understand how a species might handle global warming and to those proposing reserves in marine environments," Gilman...
Recent, rapid climate change is driving evolution of animal species
... decline in population size or be replaced by more southern
species." "Consequently, genetic shifts in the timing of seasonal events should precede genetic shifts of thermal optima or increased heat tolerance over evolutionary time," said Holzapfel. "That is the pattern that is emerging. Questions remain ab...
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