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Tag: "migration" at biology news

The secret lives of whales

...singers moving coherently?and watch the collective migration of species over large portions of an ocean basin. “So if I am a whale off Newfoundland, I can hear a whale off Bermuda,?says Clark. Singing whales appear to slalom from one geographic feature to the next using the echoes of their intense, infrasonic ...

Researchers reveal the infectious impact of salmon farms on wild salmon

...,500 young wild pink and chum salmon over 60 km of migration route; an enormous data set from months of laborio...eeded ambient levels for 30 kilometers of the wild migration route." This increase in sea lice abundance is likely to be damaging for already dwindling wild sal...

Vital step in cellular migration described by UCSD medical researchers

...ovement of a cell provides a new insight into cell migration and ultimately could lead to therapeutic intervent...erg, M.D., UCSD professor of medicine. "Since cell migration plays an important role in the immune response, as leukocytes move toward targets, a therapy that st...

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

...ggests they'll work just as well at inhibiting the migration of prostate and colon cancer cells," said senior r...explained. "So recently the idea of targeting cell migration -- metastasis -- has become an alternative strategy that's gained a lot of interest among researcher...

Study of genomic DNA leads to new advances in cancer diagnostics

...hanges to the ECM and cytoskeleton are critical to migration of a cancer cell from one site in the body to another. The researchers could alter the Alu I sensitivity of a cell's chromatin by exposing the cell to a single extracellular matrix molecule or by disrupting any of three cytoskeletal systems, which l...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...local pollution, habitat destruction and narrowing migration corridors for many species are among the consequences of introducing intensive agriculture, modern cattle ranching, energy production, mining and other changes in land use in and around the Pantanal. "Without extremely careful integrated management,...

In the migratory marathon, parasitized monarchs drop out early

... destination. A little-studied outcome of animal migration is whether these long journeys can limit the sprea...and do not migrate. Study results suggest that if migration is lost from this system, remaining populations will become heavily parasitized. More generally, thi...

Scientists find fossil proof of Egypt's ancient climate

...have been a particularly good time for a northward migration through Africa following reliable water resources, since it seems to be the strongest humid phase in this region over the past 400,000 years. We're also testing the hypothesis that humid events were more frequent than previously thought, which would ...

Chemists identify key gene in development of type 1 diabetes

...ed on the formation of the MIF protein (macrophage migration inhibitory factor), a proinflammatory protein that they showed in previous studies is elevated in diabetic animals and may be involved in the cascade of immunological events that leads to the destruction of the pancreas and the subsequent onset of ty...

Towards precise classification of cancers based on robust gene functional expression profiles

...ed on the formation of the MIF protein (macrophage migration inhibitory factor), a proinflammatory protein that they showed in previous studies is elevated in diabetic animals and may be involved in the cascade of immunological events that leads to the destruction of the pancreas and the subsequent onset of ty...

Chemicals in tattoo inks need closer scrutiny

...rning sensation during the course of MRIs, and the migration of inks to different tissues in the body, such as the lungs. It is unclear, however, what the specific causes of these reactions might be, and the only way to gain better understanding is to know what chemicals make up the inks, the researchers say....

Protein prevents detrimental immune effects of bacterial sepsis

...eated with LPS, the immune system induced a steady migration of white blood cells from the blood into affected tissues. However, mice deficient for annexin 1 exhibited a dramatic release of white blood cells from blood vessels, ultimately leading to 100% mortality by 48 hours. The researchers characterized th...

Butterfly migration could be largest known

...butterflies at UC Davis. "This may be the biggest migration of modern times," Shapiro said. Shapiro said he is getting reports of "billions" of butterflies around Trona, near Death Valley, and in the San Fernando Valley. More waves of butterflies are likely to appear in central California over the next few w...

An (ecological) origin of species for tropical reef fish

...ion events may overcome the homogenizing effect of migration in the ocean, vindicating Darwin's original ideas about the importance of ecological speciation in biodiversity evolution. ### Ref: Luiz A. Rocha, D. Ross Robertson, Joe Roman, and Brian W. Bowen. 2005. Ecological speciation in tropical reef fishes...

Pair of cancer genes found to drive both cell migration and division

...or undergoing unequal divisions. In addition, cell migration can lead to tumors spreading and developing in dif...edicines that target PI3K or PTEN and prevent cell migration could also potentially help with inflammatory disorders, such as arthritis, since inflammation is ca...

Census of Marine Life explorers surprised by diversity, density of Arctic creatures

...BirdLife International to track and understand the migration of albatross, 19 of 21 species of which are threatened and the other two near-threatened. ...

New understanding of cell movement may yield ways to brake cancer's spread

...ut species. Knowing exactly what triggers cellular migration can help develop treatments that halt cancer metastasis and immune disorders like arthritis and asthma. "Previous studies by us and others have identified how a migrating cell 'gets its wheels' and, mechanistically, is able to move. In this study, w...

Researchers discover stem cell 'guide' that may be key for targeting neural stem cell treatments

...u and his colleagues discovered how PK2 guides the migration of neurons born from neural stem cells from the subventricular zone in the brain's core through mature tissue to reach the olfactory bulb, the "smell" part of the brain located above the sinus cavity. PK2 allows these new neurons to settle into the p...

International Team Determines Geographic Origin of Leprosy

...h the historical understanding of leprosy's global migration and contradict a commonly held view that leprosy s...ia and the Pacific region, represents the eastward migration of leprosy, while type 3, seen in Europe, North Africa and the Americas, is the form that migrated w...

How monarch butterflies are wired for navigation

In their extraordinary annual migration from North America to Mexico, monarch butterflies are known to use the angle of polarized sunlight as a celestial guide to help them keep to a straight and true path southward. But details of their navigational machinery have remained a mystery. Now...

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