Sentences with phrase «scientists estimate some populations»

Not exact matches

The old estimates were based on 20th - century data from the whaling industry itself, which estimated a worldwide sperm - whale population of about 1.8 million, a number that few scientists found credible.

Using the long - gone youngster's genetic instruction book, scientists have estimated that humans emerged as a distinct population earlier than typically thought, between 350,000 and 260,000 years ago.

Estimates show that by 2050 the world population will be more than 9 billion and this growth will occur primarily in areas of the world already experiencing food scarcity and water availability issues, as Steven Leath, plant scientist and president of Iowa State University, noted in a lecture last year at AAAS.

With this map of genetic variation in hand, the scientists could then estimate how big the population of passenger pigeons once was — typically, a small population will have less genetic variation than a larger one because it derives from a smaller pool of ancestors who bred successfully.

«Estimating flu in specific, localized populations pushes the limits of what we thought we could do [with social media], and it opens the door to new possibilities,» says Mark Dredze, a computer scientist at Johns Hopkins University, who was not involved in the new study.

European scientists asked volunteers to estimate statistics like the population density of Switzerland.

The scientists estimate that these gene variations were able to persist in Neanderthals because Neanderthals had a much smaller population size than humans.

This is an integral part of conservation as it enables scientists to identify individuals and estimate population sizes.

Slower population growth that leads to eight billion people in 2050 rather than to the currently projected 9.1 billion would save one billion to two billion tons of carbon annually by 2050, according to estimates by climate scientist Brian O'Neill of the National Center for Atmospheric Research and his colleagues.

Using this method to estimate the abundance and distribution of fish species could help scientists more easily understand the impact certain environmental factors, such as oyster farms or pollution, are having on local fish populations.

Scientists now suggest that over a quarter of all fish traditionally identified as white marlin — an overfished and endangered species — are actually «the enigmatic roundscale spearfish,» which complicates efforts to estimate and rehabilitate marlin populations.

Scientists estimate that dyslexia and other reading disabilities plague about 5 % to 10 % of the population.

Scientists estimate an established breeding population of Asian carp could devastate Lake Michigan's $ 7 - billion commercial and sport fishery by devouring the food sources native fish need to survive.

Shark populations are declining globally, and scientists lack data to estimate the conservation status of populations for many shark species.

To estimate the size of the species population, these citizen scientists visit 200 coastal sites over the course of three weeks where butterflies spend their winters.

Using probabilities like these, scientists can estimate the planet population of our galaxy from Kepler's observations.

Yeast infections are so common today that scientists estimate 70 % of our population suffer from candida1, a type of yeast infection!

Scientists estimate 70 % of our population — both men and women — suffer from candida albicans overgrowth.

Scientists studying sociopaths estimate that 4 % of the U.S. population have sociopathic characteristics.

Scientists estimate that if more than than one percent of female orangutans in a given population are killed in a year, that population will go extinct — a figure that doesn't bode well for the Kalimantan apes.

Scientists do not have a good estimate for the entire population, but estimates for the eastern North Pacific range from 26,000 to 100,000 individuals.

The scientists estimated that in Minnesota, Illinois and Wisconsin, borer populations in adjacent non-Bt fields declined by 28 to 73 percent, with similar reductions recorded in Iowa and Nebraska.

The population of orangutans in Borneo is uncertain, but most scientists estimate there are fewer than 50,000 individuals.

If nothing is done to reverse possible scenarios outlined in the report, scientists warn that the global polar bear population — estimated at about 8,500 — could start to see significant trouble.

What «something» other than science might a polar bear scientist be tempted to use in estimating the polar bear population?