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Tag: "migration" at biology news

Gifts from the sea

It's annual migration time on Cape Cod again, the time of year when Woods Hole squid arrive by the tens of thousands. It's a sign of spring to the fishermen who make a living in this important New England fishery. But here at the Marine Biological Laboratory (MBL), it tri...

Plankton can run, but can't hide from basking sharks

...t the sharks are responding to changes in vertical migration by the zooplankton. Zooplankton have evolved a range of behaviours to try and avoid being eaten, sometimes staying at greater depths during the day and then feeding near the surface at night but at other times reversing this behaviour in an attempt t...

Discovery of T-cell 'traffic control' boosts new drug promise

...ause this also blocks S1P's chemotactic influence, migration of T cells out of the lymph nodes is greatly reduced. T cells are essentially sequestered in the nodes. Such an effect would prevent T cells from swamping newly transplanted organs or launching a harmful autoimmune reaction, the scientists suggest in...

Genetics links whale to two different ocean basins

...r," added Rosenbaum. "In particular, inter-oceanic migration data will help us to better evaluate the current international management procedures for humpback whales." ...

Ships bring alien jellyfish invaders to our shores

...movements could answer similar questions about the migration and introduction of any suspected non-native marine creatures, according to its developers, UNSW oceanographers, Associate Professor Matthew England and Alex Sen Gupta. "Until now our knowledge of natural and human-assisted dispersal of species has ...

Researchers Discover Gene That Determines Asthma Susceptibility By Regulating Inflammation

... found that the absence of the Nrf2 gene increased migration of inflammatory cells into the airways and caused an enhanced asthmatic response in mice. “Nrf2 is critical for proper response to allergens in lungs and maintenance of a balance between ROS production. Antioxidant capability regulated by Nrf2 may be...

Scavenger cells could be key to treating HIV-related dementia

...rain could help researchers find ways to block the migration and prevent HIV-associated dementia, said Marco Sa...said. "It's the fact that there is this continuous migration of infected macrophages to the temporal lobe. The virus mutates much faster there, the macrophages k...

Genetic link confirmed between Polynesians and indigenous Taiwanese

...se for 10,000 to 20,000 years, and that Polynesian migration probably originated from people identical to the aboriginal Taiwanese. Further research will be necessary to precisely determine the origins of the aboriginal Taiwanese; however, these results are a step towards clarifying the origins of Polynesians....

High-Throughput GoMiner

...se for 10,000 to 20,000 years, and that Polynesian migration probably originated from people identical to the aboriginal Taiwanese. Further research will be necessary to precisely determine the origins of the aboriginal Taiwanese; however, these results are a step towards clarifying the origins of Polynesians....

The ecological effects of the Chernobyl disaster

...s of 90Sr and 137Cs vary with feeding, nesting and migration habits. Timothy Mousseau will present "Consequences of radiation for reproduction and survival of barn swallows Hirundo rustica from Chernobyl." Barn swallows are long-distance migratory birds, which nest across Europe, providing researchers with nu...

UNC scientists discover new role for protein as fundamental inhibitor of cell movement

...et protein that may play a role in clotting. Cell migration belongs to the most rudimentary of cellular functi...d healing to occur in humans. Increased tumor cell migration also is one of the hallmarks of highly aggressive, rapidly spreading cancer tumors. The study appea...

On a wing and a prayer - Alaska researchers seek clues to bird flu

...ensive overlap between the Old World and New World migration systems as a disease pathway," said Winker, curator of birds at the UA Museum of the North and an associate professor of biology at UAF. "Our ability to combine studies in natural history and biomedicine is why I came to UAF," Runstadler said. "We a...

Chernobyl: The true scale of the accident

...e agricultural areas? Weathering, physical decay, migration of radionuclides down the soil and reductions in bioavailability have led to a significant reduction in the transfer of radionuclides to plants and animals. Radioactive iodine, rapidly absorbed from grasses and animal feed into milk, was an early con...

Research: Snails were overlooked contributors to marsh destruction

...of the die off, where healthy grass remained. This migration resulted in the formation of grazer "fronts," which attacked and destroyed more marsh in "waves" of runaway consumption, the authors write. A team of scientists from UF, the Netherlands Institute of Ecology, Louisiana State University and Brown Univ...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

...he Americas and would support a much earlier human migration than is currently accepted," the team wrote. One of the team members, Matthew Bennett of Bournemouth, was quoted on a Royal Society Web site as saying, "Accounting for the origin of these footprints would require a complete rethink on the timing, ro...

HIV/AIDS rates in Tijuana, Mexico increasing at alarming rate

...that attract migrants from elsewhere Mexico. Such migration is linked to lower socio-economic status, social and political alienation, lower awareness of HIV/AIDS and, for some, the need to turn to substance use and sex work to fill the perceived void ?all contributing factors that can lead to increased vulne...

New discovery: Molecular variation in one gene affects the growth of natural populations

...nd its connectivity to existing populations affect migration and gene flow between populations. The study shows that genetic factors and the structure of the habitat together influence variation in population growth. The results also show that the structure of the habitat and the dynamics of the species in a ...

Neurons find their place in the developing nervous system with the help of a sticky molecule

...stem." Neurons migrate throughout the brain, but migration is particularly important for development of part ...al now is to determine how MDGA1 controls neuronal migration and what the long-term consequences are of its loss. Impaired function of neuronal adhesion molec...

Pacific Islands paradise protected

...ristine nature of the area and its importance as a migration route. "It's a remarkable atoll marine wilderness area, the most magnificent I have ever seen. The Phoenix Islands have experienced little human impact and this important conservation action by Kiribati will protect the area from future threats incl...

Marijuana-like compounds suppress the immune response

... involvement in the initiation of white blood cell migration to sites of infection and inflammation. In the ...nd colleagues used an in vitro model of blood cell migration to study the involvement of CB2 in the recruitment white blood cells. They found that treating the ...

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