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Tag: "species" at biology news

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

...n exploitation. Data on population sizes for these species are lacking, and diving behaviour is one factor contributing to surveying bias," the authors say. Unless adjusted to account for these differences in diving patterns, current surveys could be over- or underestimating basking shark abundance by at lea...

Siberian tigers hang tough

...y. Still to come will be an assessment of the prey species tigers are dependent on, and a more rigorous analysis of tiger distribution and abundance. According to Miquelle, "Over the next few months, we will be completing the geographic database to ensure these data are preserved, and then we will begin a mo...

Divergent life history shapes gene expression in brains of salmon

... brain can differ significantly among members of a species with different life histories. Their study indicat... Arts and Sciences. "Since these males of the same species in the same wild environment differed only in their life history, we did not expect the expression o...

University of Nevada, Reno research team discovers hormone that causes malaria mosquito to urinate

...he problem with methoprene, however, is that for a species such as the tobacco hornworm, methoprene causes it...ey said. "Like methoprene, DH31 only affects lower species such as insects, which suggests it should be very safe to non-insect species." Schooley said that ...

New lifespan extension genes found

...ic restriction, is known to extend the lifespan of species including yeast, worms and rodents. Previous research linked a gene called Sir2 with lifespan extension due to caloric restriction, but worms and yeast that lack Sir2 also live longer when put on a tough diet, showing that some other genes must be at...

Say what? Bacterial conversation stoppers

While a chattering crowd of various species of bacteria is essentially a microbial tower of Ba... researchers have found that bacteria of different species can talk to each other using a common language ?and also that some species can manipulate the conver...

Spider blood found in 20 million year old fossil

... the spider which he identified as an entirely new species of spider. On his return to the UK, further research revealed the droplets of blood and the information the fossil contained. ...

Space matters: Estimating species diversity in the fossil record

Estimates for the number of living species on earth range from 3.5 million to over 30 million but only 1.9 million species have been classified and described. Estimating historical biodiversity from the fossil record is an ...

Woods Hole Research Center plans controlled burn in Amazon rainforest

...ntists will learn just how resilient some of these species are. It is quite clear, however, that the composition of the forest will be altered following a fire, and researchers will monitor the impact on forest composition as well as the effect this change has on animal populations and behavior. These exper...

New Scripps Oceanography project to study sediments and ecosystem restoration in Venice lagoon

...n Deheyn will use luminous brittle stars, a cousin species of starfish, to determine whether contaminants in the Venice Lagoon are bioavailable (the amount of contaminants locally present and shown to be accumulated by the organism) and could potentially induce stress on the local ecosystem. "This will be a...

A new molecule discovered in the battle between plants and disease

...ed from the plant Arabidopsis thaliana, which is a species favored by investigators for attributes that facil...imentation, but the same molecule is found in crop species such as canola, soybean, potato, tomato, rice, and poplar. Therefore, further work on Pep1 and its r...

For first time, brain cells generated in a dish

... general location was known, but it was an obscure species in a sea of cell types. "We've isolated for the first time what appears to be the true candidate stem cell," said Steindler, a neuroscientist and member of UF's Program of Stem Cell Biology and Regenerative Medicine. "There have been other candidate...

Virologist finds contagious equine flu in dogs

...hey jump species. For a new virus to enter another species it must overcome a number of barriers, such as finding a cell receptor to bind to in order to enter the cell and to reproduce sufficiently in the new host. "There are probably many examples of viruses jumping species, but then it becomes a dead-end ...

Expanding forests darken the outlook for butterflies, study shows

...ool, Roland said. "In general, inbreeding leads a species to be more vulnerable to a variety of mortality fa...d explained. "This has been demonstrated for other species of butterflies." Only a few species of butterflies are threatened in the Canadian Rockies, but many...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

..." Domack suggests the strong possibility that new species of marine life may be uncovered in continuing analyses of the area as ecosystem experts sample the site. The international expedition was there on a U.S. Antarctic Program cruise to study the sediment record in the area vacated by the former ice shel...

Logging changed ecological balance for monkeys, damaged health

...urnal of Applied Ecology. While the three primate species were subject to a higher risk of infections, only ... than in undisturbed forest, where often the three species share trees. "When we look at their numbers over time, they continue to decline 28 years later," Gi...

Hybrid grass may prove to be valuable fuel source

... Heaton said. In untilled fields, various wildlife species make their homes in the plant's leafy canopy and i...ariflorus and some of the other fertile Miscanthus species can be quite invasive," she said. At a research station near Hornum, Denmark, giant Miscanthus has ...

Affymetrix and ParAllele Launch Industry's Most Comprehensive Product Line for Targeted Genotyping

...urnal of Applied Ecology. While the three primate species were subject to a higher risk of infections, only ... than in undisturbed forest, where often the three species share trees. "When we look at their numbers over time, they continue to decline 28 years later," Gi...

President Bush's cut to AIDS prevention in Africa would be devastating

...urnal of Applied Ecology. While the three primate species were subject to a higher risk of infections, only ... than in undisturbed forest, where often the three species share trees. "When we look at their numbers over time, they continue to decline 28 years later," Gi...

Cultural norms not unique to human societies

...rs well into adulthood and say that although other species show some cultural behaviors, the level of cultura...udy demonstrates apes do copy members of their own species and they develop different traditions by doing so," said Dr. Horner. "It makes it likely differences...

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