Tag: "species" at biology news
A 'private bandwidth' for communication in bats: Evidence from insular horseshoe bats
...ade of a constant frequency. Different rhinolophid species
show different frequency values. It has been propo...ificant risk of overlap and, in turn, confusion in species
recognition. By calling respectively at lower and higher frequencies than on the mainland, R . eurya...
Multinational research: protecting ecology means understanding people, too
...sive species, declining range size and diminishing species
populations, poverty and social conflict, over-exploitation of resources, land-use change and habitat loss. These are big challenges some of the most vexing challenges of the 21st century. The two call their five-year project "Applied Biodiversity ...
Climate change isolates Rocky Mountain butterflies
...e isolated," Roland said. "The gene pool of this species
is getting more and more fragmented, and gene flow...rrently a threatened species, but they and smaller species
native to Rocky Mountain meadows, including some insects and rodents, will suffer "several consequen...
Pollution causes 40 percent of deaths worldwide, study finds
...uence parasite evolution and the ability of exotic species
to invade new areas. As a result, such diseases as tuberculosis and influenza are re-emerging as major threats, while new threats -- including West Nile virus and Lyme disease -- have developed. "A growing number of people lack basic needs, like pure...
Which came first, the moth or the cactus?
... Mexico, the senita moth depends on a single plant species
-- the senita cactus -- both for its food and for ...actus is equally dependent upon the moth, the only species
that pollinates its flowers. Senita cacti and senita moths have a rare, mutually dependent relations...
Gene regulation, not just genes, is what sets humans apart
...s have found significant differences between these species
in the coding regions that govern the immune system, the sense of smell and the manufacture of sperm, but the coding regions of neural-related genes had shown very little sign of positive selection in these studies. Yet, as far back as 1975 when Mary...
X-ray images help explain limits to insect body size
...of 1,000. Overall, they found that larger beetle species
devote a disproportionately greater fraction of th...hen examined the tracheal measurements of the four species
to see if they could predict the largest size of currently living beetles. The head data predicted a...
Tropical insects 'go the distance' to inform rainforest conservation
...erve them. The study included approximately 500 species
of caterpillars, beetles and fruitfliesfruit flies from common plant-eating families and 175 species
from four diverse plant groups across 28,950 square miles of contiguous lowland rain forest in Paupu...
OHSU turns mouse into factory for human liver cells
... liver enzymes that break down these compounds are species
specific. "Animal liver cells process drugs quite differently than human liver cells do," he said. Another obstacle for drug companies is the human liver cell market is filled with poor-quality or nonviable cells isolated primarily from human cada...
Penguins march into new park
...on of this park comes in the nick of time for many species
that are threatened by the regions fisheries and energy industry. The new park serves as a nesting and feeding ground for some quarter million pairs of Magellanic penguin, estimated to represent 20 percent of the entire species. The park includes m...
Evolution is driven by gene regulation
...n them on that accounts for the difference between species
at least in yeast according to a report by Yale ...ere startled to find that even the closely related species
of yeast had extensively differing patterns of regulation. In this study, the authors found the DN...
A unique arrangement for egg cell division
...n the body. The process is likely conserved across species
and the new insights might help shed light on defects occurring in human egg cell development. The first step in the development of an egg cell is the division of its progenitor cell, the oocyte. Unlike other cells in the body, an oocyte does not div...
Proteaceae spread by continental drift and transoceanic dispersal
...ectacular genus Protea is truly Gondwanan, but 250 species
from other genera that occur in the fynbos vegetation (literally, fine leaved shrubs) of the highly diverse south-western Cape biodiversity hotspot are much younger, and have Australian relatives says Nigel Barker of Rhodes University, South Africa. ...
Smithsonian scientists show differing patterns of rainforest biodiversity
... within a short distance. Such change in a regions species
makeup between sites is called beta diversity: som...not been rigorously tested. Little data exists for species
distributions in these vast forests, particularly for insects, which make up a large share of the wo...
What we can learn from the biggest extinction in the history of Earth
...proximately 250 million years ago, vast numbers of species
disappeared from Earth. This mass-extinction event...l resolution. More than 90 percent of all marine species
disappeared from the Great Bank of Guizhou and other end-Permian fossil formations 250 million years...
Innovative tagging technique may help researchers better protect fish stocks
...o halt serious declines in the abundance of marine species
that have been over-fished. But even as nations begin to set aside protected parcels of ocean for marine reserves, the effectiveness of the approach as a fisheries management tool remains unclear. Simon Thorrold, a fish ecologist from the Woods Hole ...
Lost forest yields several new species
...ich, so far, have been found to contain six animal species
new to science: a bat, a rodent, two shrews, and t...instability in the area. If we can find six new species
in such a short period it makes you wonder what else is out there, said WCS researcher Dr. Andrew Pl...
Biologist traces coconut's history through DNA
...the genetic structure of plants sampled across the species
range. Superimposed on this ancient phylogeograph...es in homogenizing population structure across the species
range; and the possible geographical location of the undomesticated wild progenitor populations....
Genetic analysis finds greater threat in frog-killing fungus
... To conduct the study, researchers collected two species
of mountain yellow-legged frogs from six sites in the Sierra Nevada. Rana sierrae is found in northern Sierra Nevada and represented in the study by frogs at the sites at Little Indian Valley, Summit Meadow and Mono Pass, while Rana muscosa is found ...
Disabling a sensory organ prompts female mice to act like male mice
...y. "It means you only have to build one brain in a species
and that the one brain is built, more or less, the...differences in behavior between animals of a given species
are gender based," Dulac explained, but little is known about the underlying differences in the brai...
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