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Tag: "migration" at biology news

Spring migration of pink-footed geese under threat

...se (Anser brachyrhynchus) prepare for their spring migration north to breeding grounds in the Arctic, ecologist...ds, which the geese use as a staging post on their migration north, unless they are compensated for the damage to crops and grassland. Together with colleagues ...

Warming trend may contribute to malaria's rise

...e resistance, changing land use patterns and human migration also may play roles, climate change cannot be ruled out. "Our results do not mean that temperature is the only or the main factor driving the increase in malaria, but that it is one of many factors that should be considered," Pascual said. The new s...

Ancient DNA provides clues to the evolution of social behavior

...ry bottlenecks, Hadly says. Population crashes and migration events with a small founding population may have encouraged the rapid development of social behavior in the Argentine ant when it colonized North America, she says, and even in ancient human populations. At the very least, combining ancient and moder...

Sea coral's trick helps scientists tag proteins

...otein and organelle dynamics in living cells, cell migration during embryogenesis, inflammation, and other pathological and normal processes," he said. Unlike other green-to-red fluorescent markers, Dendra can be activated by visible blue light, which is less harmful to living cells and does not require speci...

New insights into neural tube defects

...issues in fruit flies controls the orientation and migration of cells. Working with colleagues Brian Ciruna, Diana Lee, and Alexander Schier, who were at New York University when the research was conducted, and Andreas Jenny of Mount Sinai, Dr. Mlodzik's and Dr. Schier's laboratories have now found that a si...

New analysis shows three human migrations out of Africa

...t Louis, shows three distinct major waves of human migration out of Africa instead of just two, and statistically refutes –strongly ?the 'Out of Africa' replacement theory. That theory holds that populations of Homo sapiens left Africa 100,000 years ago and wiped out existing populations of humans. Templeto...

Exotic crab poised for widespread UK invasion

...ut the first comprehensive modelling of the crab's migration through Europe and the UK. They compared the two and found the pattern of the crabs' ongoing invasion of the UK is similar to the population expansion in Europe earlier in the last century when the Continent experienced a major outbreak. The study...

Parachuting allows krill to eat and run

...small pelagic animals, they perform daily vertical migration (DVM), in which they occupy the upper ocean layers... migrations each night. What is more, the downward migration may be particularly rapid as the krill fan out their swimming legs and enter a controlled descent, a...

Possible brain hormone may unlock mystery of hibernation

...as reproduction in seasonally breeding mammals and migration in birds, they said. Even humans can maintain seasonal rhythms as exhibited by seasonal affective disorder, a recurrent depression characterized by increased sleep, overeating, and weight gain--behaviors similar to those seen in hibernators, Ohtsu no...

Proteins stop blood-vessel and tumor growth in mice

...bulin proteins, which regulate cell proliferation, migration and invasion. In the past, we have seen that they are depleted in numerous metastatic cancers, and that they inhibit the formation of new blood vessels in cell culture," said William Schiemann, Ph.D., Assistant Professor in the Program in Cell Biolog...

Study reveals mass migration of mormon crickets driven by hunger, fear

...ed the motivating factors behind the seasonal mass migration of Mormon crickets in western North America. Th...d salt, and a fear of cannibalism, drives the mass migration of Mormon crickets in western North America. Throughout their seasonal migration, millions of Morm...

Record bonefish

... satisfying for the researchers who study bonefish migration at Bonefish and Tarpon Unlimited (BTU) and the Uni...da Keys to better understand bonefish behavior and migration patterns. As fishermen discover the tags on the fish they catch, they are instructed to measure and...

Researchers identify genes in fruitflies that may shed light on human cancer spread

...entified those required for a certain type of cell migration and simultaneously captured a global view of all t...ntal Cell, has implications for understanding cell migration and perhaps controlling cancer cells that move similarly to spread beyond an original tumor, which a...

Creating a window on 'oceans in motion'

...gy experts who have made it possible to follow the migration of these animals, often in near real-time. The me... Alaskan panhandle. POST has revealed the Pacific migration routes of young wild salmon from US and Canadian rivers. Knowing their usual travels along marine ...

Ancient global warming drove early primates' dispersal

...he latest evidence suggests a completely different migration path from those previously proposed and indicates that sudden, rapid global warming drove the dispersal. Researchers from the University of Michigan, Johns Hopkins University School of Medicine and the Royal Belgian Institute of Natural Sciences p...

Queensland scientists identify molecule that links both sides of the brain

...between each side of the adult brain. QBI neural migration laboratory head Associate Professor Helen Cooper said her group's research provided new clues regarding development of the corpus callosum, the main connecting nerve tract that shuttles information between the left and right hemispheres of the adult ...

How satellite tracking revealed the migratory mysteries of endangered Atlantic loggerhead turtles

...gion. This research highlights how complicated the migration of marine vertebrates really is and how sophisticated our conservation efforts must be to safeguard these animals. Given the range these reptiles can cover an international cooperative effort in seven African states is needed to create a strategy tha...

Light guides flight of migratory birds

...ction. Previous research suggested that before the migration period, songbirds are able to recalibrate the magn...stial (including polarized light) cues, but during migration it appeared that the reverse was true, -- the magnetic field was used as the primary reference for c...

How bad is malaria anemia? It may depend on your genes

...of human proteins, including MIF (which stands for migration inhibitory factor), were long suspected to cause malarial anemia because they are known to reduce red blood cell counts as part of the body's normal response to such inflammatory conditions as rheumatoid arthritis or some cancers. Using immature blo...

Dragonfly migration resembles that of birds, scientists say

...gonflies' routes have showed distinct stopover and migration days,just as the birds' did," said Wikelski, an associate professor ofecology and evolutionary biology. "Additionally, groups of both birds and dragonflies did not migrate on very windy days and only moved after two successivenights of falling temper...

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