Tag: "population" at biology news
Nutrition Study Reshapes Strategies For Athletes
...e same kinds of things we recommend for thegeneral population
to eat. "The difference is that if you are less active, you should eat smalleramounts of the same types of foods: fresh fruits and vegetables, breads,grains, pasta, cereal, small amounts of low-fat milk and meat, and somefoods that make life interest...
Honeybees In The Wild Nearly Gone In North America
...uch closer to extinction, however, isthe unmanaged population
of honeybees." The European honeybee, which was brought to the United Statesin the 1600s, is the country's most important bee for crop pollinationand honey production, Tew said. According to the OhioDepartmentof Agriculture, more than 90 American cro...
Humble Pocket Gophers Shed Light On The Genetic Fortitude Of Cheetahs
...n grafts from one another. However, gophers from a population
with higher genetic diversity rejected skin grafts...e stuff of evolution," says Sanjayan. "It allows a population
to adapt effectively to changes in the environment. You exist at a price if you have low genetic var...
Study Shows Songbirds Switch From Bugs To Berries To Fuel Fall Migration
...e development pressure. More than half of the U.S. population
lives incoastal areas, and that percentage is rapidly growing. Conservation biologistsmay need to add loss of stopover sites to their list of concerns for migratingsongbirds. Parrish's study suggests that the importance of fruit-rich habitatsalong co...
Duke Primate Center Sets October Expedition To Find 'Juliet'
... lemurs that are nowextinct. The pressure of human population
increase on the island republicoff Africa's east coast now threatens many extant species. The precarioussituation demands widespread help for the rescue efforts made by Duke'sPrimate Center and conservation agencies in Madagascar, Glander and Simonss...
End Of World Population Growth Projected For 21st Century
... 80 years, may never double again,according to new population
forecasts by the Population, Development andEnviro... will not reach 11.5 billion double today's population
within the next century, if ever. The projections are the first fullyprobabilistic ones ever r...
'Juliet' Evades Primate Center Expedition
... lemurs that are nowextinct. The pressure of human population
increase on the island republicoff Africa's east coast now threatens many extant species....
UC Berkeley, U.S.G.S. Scientists Discover Microscopic Invader Of San Francisco Bay, The First Known Marine Microbe Invader Of U.S. Waters
...n will be on the ecosystem, Sloan says, but at the population
levels currently found, it is likely to have a lar...tes it makes up over 50 percent of the foraminifer population
and in one case over 90 percent. The mud and water found in ballast tanks of ocean-going ships is ...
Study Examines How Mechanisms Evolve To Regulate Bee Development
...est for genetic effects, the researchers created a population
withouta queen, whose job is to mate and lay eggs. As a result, the workers laideggs. But because workers don't mate, their eggs go unfertilized and theiroffspring are drones. Sons of fast workers again grew up fast, suggesting,Robinson said, that dr...
Cornell Scientists Find Way To Boost Rice Crop Yield -- They'll Walk On The Wild Side
...ding and Biometry. "The world is only so big, the population
is growing and we need to continue feeding that po...creasing the yield. From 1965 to 1995, the world's population
doubled to reach its current size of 5.7 billion people. With global estimates of 8.9 billion peopl...
No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
...em that will grow progressively worse as the human population
rises unless we take direct steps to counter it."...
Christmas Bird Count: Another Holiday Tradition
...ta for the best source of data on distribution and population
for the many species of birds. This year the count covers the three weekends between December 20 to January 5. The Society publishes the data in the journal Audubon Field Notes. But it also provides its many years of Christmas Bird Count re...
Urbanized Watersheds More Sensitive To Climate Change
...nsitivity of stream flow to climate change. Using population
data from the U.S. Census Bureau, precipitation i... but in the Northeast, we find that with a higher population
and the same precipitation, stream flow increases more," De Walle told attendees at the American G...
U.S. Geological Survey 1998 Budget: Increased Support For Drinking Water, Earthquakes And Biological Sciences
...ector Gordon Eaton said. "We canexpect our growing population
to consume enormous quantities of water,energy and mineral resources and to push development into areas that areprone to natural hazards or already valued for recreation or naturalresources. This budget is designed to help us solve some of the mostp...
'BirdSource' Website For Citizen-Science Data
...e data on the distribution, migratory pathways and population
trends for North American birds," said Audubon President John Flicker. "This partnership is a perfect marriage of Cornell's high-tech computer capabilities, the Lab of Ornithology's citizen-science team and Audubon's thousands of volunteer birders c...
Malnutrition Impacts Longevity Of Females More Than Males And Shows Gender Differences In Fruit Flies
...reeding Medflies are used as models to study basic population
questions.The newly published study provides a statistical analysis of the life spanof more than 400,000 Mediterranean fruit flies. It was conducted by UC Davisstatistics professor Hans-GeorgeMüller and entomology professor JamesCarey and will a...
Isle Royale Moose Continue Decline
...and a heavy infestation of winter ticks. The moose population
was dealt yet another blow, the late arrival of sp...Park Service. Peterson notes that the park's moose population
had grown dramatically over the past 15 years. This was due to a population
crash in '81 - '82 of th...
Hot 'Lanta: NASA, School Kids Team To Study How Trees Help Cities Keep Their Cool
...tral business districts rather than one. While the population
of Atlanta proper droppedfrom 495,039 in 1970 to 394,017 in 1990, the suburban population
in 20 counties around the city soared from 1.8 millionto 3 million. Atlanta can also be taken as a ...
New understanding of crab populations may not bring fishermen's delight
..., one of the most important andfiercest debates in population
biology swirls around whether populationsgo throug... influences more specifically. "In the history of population
ecology, one of the big-time questionsis what regulates populations," Hastings says. "We've got a mo...
Natural Shelters on Leaves House Plant Bodyguards
... leaves, offering the shelter necessary to house a population
of plant-protectingbugs, report researchers at the University of California, Davis. By simulating these naturally occurring shelters, known as "leafdomatia," on cotton plants, the researchers reduced the populationsof cotton-eating spidermites and...
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