Tag: "nest" at biology news
HIV protein attacks body's innate protection system that could prevent virus' replication
... this defense system of the body, providing a safe nest
in which HIV progeny get produced. Vif comes in and somehow recognizes this innate system. If Vif isn't there, the progeny get destroyed during their birth." Kabat's team began work on Vif in 1997 and published its first paper on the viral protein a ...
Scientists estimate risk of raven predation on desert tortoises
...and 59 percent predation risk. Because ravens may nest
in different locations from one year to the next, ...providing road-killed animals as food subsidy near nest
sites, said Boarman. The densest raven populations are in rural and urban areas. However, due to lim...
Snowy plover 'nursery' success earns Resource Stewardship Award
...'s ability to find a predictable place to rest and nest
undisturbed. He then determined the smallest portion of the beach that could be closed to maximize protection of plovers with minimal inconvenience to beach users. The proposed enclosure would stretch from wet sand to dry areas above the tidal zone,...
Ranches key to conservation in rocky mountains
...ntrast, rural developments had higher densities of nest
predators, such as the black-billed magpie, and of birds that are usually uncommon to the area, such as Bullock's oriole, a tree-nester that is presumably attracted by the landscaping trees. Moreover, ranches had more native plant species and fewer ...
Study of bees by UC San Diego biologist provides insight into evolution of bee communication
...to a food source. Honeybees communicate within the nest
how to get to the food source and do not leave a scent trail between the nest
and the food source. However, they can mark flowers with special odors to help guide nestmates to th...
Honeybee gene find ends 150-year search
...ne set of genes, sisters that work together in the nest
share more genes in common with each other than they would with their own sons and daughters. But this also has a downside for bee breeders. When bees are inbred to select desired traits, fertilized eggs with two copies of the same csd allele can occ...
Earthworm invasion will change forests
...unity will be less diverse. For example, ovenbirds nest
in leaf litter, so I expect them to decline." Earthworms are native to much of the western United States and Canada and the southeast quadrant of the United States. But it remains to be seen whether those native earthworms will resist invasion from ...
More raccoons may mean fewer songbirds
...irds are doing particularly poorly, and artificial nest
experiments suggest that raccoons are among the main predators of eggs and chicks of the state's ground-nesting birds. Raccoons have increased greatly in Illinois in the last 20 years, with surveys spotting three times as many of the nocturnal carniv...
An old, familiar love nest helps sexual success
... -- Billing and cooing in an old and familiar love nest
doubles and even triples some birds' chances of producing progeny, researchers at Cornell University have discovered. Their study, which focused on Japanese quail, is the first to document what farmers and researchers have long suspected: that breedi...
US bald eagle counts continue to climb slowly
... is because winter counts include bald eagles that nest
in Canada and Alaska, where populations may not be increasing at the same rate as populations in the conterminous U.S., said Steenhof. The bald eagle, unique to North America, has been the national symbol of the United States for 201 years, ever si...
Lead-based paint is poisoning albatross chicks at Midway Atoll National Wildlife Refuge
...reeding pairs. Many other species of seabirds also nest
on the atoll's tiny islands. The albatross nest
on the ground and have no fear of humans, so their nests are found not only in open fields but also ...
Graduate student Kristine Preston wins competition for A. Brazier Howell Award
...I simultaneously manipulated food availability and nest
predation levels (through food supplementation of Wrentit pairs and their primary nest
predator, the Western Scrub-Jay ( Aphelocoma californica )). Both food limitation and nest
'Work stinks': It's more than just a slogan among ants, researchers find
...r is not enough to persuade a forager to leave the nest
and search for food. Rather, it takes a series of ...ry soil in and out of the entrance as they dig new nest
chambers. But experiments have shown that encountering nest
workers has no effect on a forager's dec...
Highway deaths highest for males Male urban squirrels, that is
...uction with the aid of miniature cameras placed in nest
boxes and viewable via the Internet."...
Roadsigns for rodents
...d 4 female mice were put intospecial arenas with a nest
box, food supply and bedding, andgiven 10, 5cm dia..., and their movementsanalysed. Activity around the nest
box tended to consist only ofshort, local meanderings not based upon the location of the nest.Moveme...
Wild ape population undergoing 'catastrophic' decline
... line through 20 kilometers of forest found 67 ape nest
groups. In 1997 and 1998, researchers in the same ...- more than 100 times the distance -- and found 91 nest
groups. The researchers found that the density of nests varied according to how far the site was fro...
Coots can count
...ff of chicks. Typically about half the chicks in a nest
starve to death," Lyon said. "That explains both the cost of parasitism to the host and the benefit to the parasite." Female coots, Lyon found, are quite good at recognizing and rejecting parasitic eggs. Rejected eggs were buried deep in the nesting ...
Climate change linked to migratory bird decrease
...ds more competition for resources such as food and nest
sites when they return to breed in the spring and that in turn could decrease the total number of migratory birds as well as the number of species. To see if climate change affects the abundance and diversity of migratory birds, Lemoine and Boehnin...
Indiscriminate nursing in communal breeders: A role for genomic imprinting
...er breed communally. Thus, offspring in a communal nest
will be more closely related through the paternal than the maternal line. It may therefore be in the male's interest that all of his offspring are nursed regardless of their maternal origin. This may have selected for paternally expressed genes that ...
Leatherback sea turtles careening towards extinction
...e of Pacific leatherbacks is daunting because they nest
in four different countries, range through territo...to their widespread geographic distribution. They nest
primarily in four Pacific rookeries where the number of individual nesting females has declined by m...
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