Sentences with phrase «bear population studies»

I didn't want to get too deeply into the analysis of polar bear population studies.

I believed that claims about polar bear population declines were based on polar bear population studies.

Not exact matches

Generation Z, those born 1997 to present, now represent 27 percent of the U.S. population, a larger group than Millennials, and although only older Gen Zs are entering adulthood, their impact on the food industry is already being felt, finds a new study by The NPD Group, a leading global information company.

Vancouver's steady population growth, in particular its unusually high percentage of foreign - born residents, is the basis of this confidence, said Mario Lefebvre, the director of the board's Centre for Municipal Studies, in an analysis released on Thursday.

One should bear in mind that studies of populations show that condom use for contraceptive purposes has a failure rate of 12 \ % [6]- where «failure» means conception, which can occur only once a month, whereas HIV can be transmitted any day of the year.

there were 3 groups in that 1967 study (btw 68 kids divided into 3 groups, by no means a big study), all kids were born in poverty, so these kids couldn't represent whole population.

Venneman et al 2009 were first to find unqualified proof of this long suspected fact having conducted a populations - based study of 333 infants who died of SIDS between 1998 and 2001 matched in age to 998 «control infants» born 4 to 6 weeks after the case infants.

The findings of the 7 published observational studies relating breastfeeding to reduced risks of diabetes were broadly consistent, despite the widely differing nature of the populations [including one study conducted in a population born during the Dutch Famine of World War II (6) and 2 conducted in Native American populations (21, 22)-RSB-.

This should lead to tremendous advances in time - domain astronomy: studying fast - changing phenomena as they occur — black holes being born, supernovas exploding — as well as locating potentially Earth - threatening asteroids and mapping the little - understood population of objects orbiting out beyond Neptune.

The analysis uncovered major changes in population growth; with the exception of wolves, all species experienced a drop in population growth rates immediately following the collapse, and three species — wild boar, moose, and brown bears — exhibited significant reductions in population growth throughout the decade following the collapse, with declines evident in 85 % or more of the study regions.

A new University of Washington study, with funding and satellite data from NASA and other agencies, finds a trend toward earlier sea ice melt in the spring and later ice growth in the fall across all 19 polar bear populations, which can negatively impact the feeding and breeding capabilities of the bears.

Actually, however, the money is necessary to study the animals and keep their population healthy in accordance with federal law, not to mention that bears undoubtedly pay for themselves.

In this study, scientists evaluated high - resolution satellite imagery to track the distribution and abundance of polar bears on a small island in northern Canada in an attempt to develop a tool to monitor these difficult to reach populations.

The study also shows that dispersing males connect the enigmatic brown bear population of the Alaskan ABC - islands to the North American mainland, and that the resulting movement of genes is substantial enough to maintain high genetic variability within this island population.

«It is possible that Svalbard may have provided one such important refuge during warming periods, in which small polar bear populations survived and from which founder populations expanded during cooler periods,» argues biologist Charlotte Lundqvist of the University at Buffalo, The State University of New York, who is a co-author of the new study.

The researchers used the extensive nationwide Swedish health and population register databases and studied all children aged 4 - 17 who were born in Sweden from 1984 to 2007.

Of the total study population, almost 10 % of people (418 433) were migrants born outside Canada, and almost 23 % (95 148) of migrants were refugees.

«When we look forward several decades, climate models predict such profound loss of Arctic sea ice that there's little doubt this will negatively affect polar bears throughout much of their range, because of their critical dependence on sea ice,» said Kristin Laidre, a researcher at the University of Washington's Polar Science Center in Seattle and co-author of a study on projections of the global polar bear population.

The earlier study also compared shark population numbers with other apex predators, such as polar bears and killer whales.

They borrowed an analytical technique used in agricultural breeding (but never before applied to the study of wild populations) to determine that squirrel babies born earlier in the spring thrive and reproduce at a higher rate than squirrels born later.

Latvala and his colleagues used data from two ongoing population - based longitudinal studies of Finnish twins, FinnTwin12 (FT12), of twins born 1983 - 1987, and FinnTwin16 (FT16), of twins born 1975 to 1979.

Lamb and his colleagues studied a threatened population of grizzlies in the Monashee Mountains, just east of the Okanagan, the leading edge of bear recovery efforts in British Columbia.

The study, published in a recent issue of the journal Ecography, was accomplished using satellite - linked telemetry - tracked populations of polar bears in the Beaufort Sea and Hudson Bay.

All good questions, says Steyaert, who hopes that others will repeat his team's study on other and larger brown bear populations.

An innocent study of brown bear populations in Bulgaria has found that the country's former communist leader was not one to look a gift bear in the mouth.

The potential effects of climate change on the spread of insect - borne diseases is a major public health concern, but this study found little evidence that mosquito populations in these areas were responding to changes in temperature or precipitation.

«In fact, a study looking at the genetic and morphological variability of Asian Black Bear populations throughout the geographic distribution of the species is yet to be conducted, and it would surely yield exciting results,» Gutiérrez said.

Future studies, including data from larger sample sizes of wild - born and geographically well - defined individuals, and full Y - chromosome sequences from bonobos, gorillas and orangutans, promise to further our understanding of population histories, male - biased behaviours, mutation processes, and the functions of Y - chromosomal genes.

This suggests that the studies associating vitamin A with osteoporosis in these populations may bear no relevance to those of us consuming even barely sufficient amounts of vitamin D.

Research Assistant, Institute of Ecosystem Studies, NY (May 00 — Aug 00) The interactions of tree regeneration, rodent and bird populations, and tick density and their effect on the risk of human exposure to vector - borne disease.

The aim of this investigation was to study the prevalence of heart murmurs in the Swedish population of six - year - old CKCS born 2001 and 2003, and to estimate if prevalence has decreased since the breeding program was introduced 2001.

Dr. Barnes participated in the H1N1 studies, and black bear and Florida panther population research with Florida Wildlife Conservation.

At Brooks River, staff continue to collect data for a long term bear population and habitat use study.

For the real story on polar bear populations, see Federal studies show polar bear, walrus populations in trouble.

Linda Gormezano, a biologist at the American Museum of Natural History, has been studying the polar bear population along the western shore of Hudson Bay.

The group said that in Canada, home to two - thirds of the world's polar bears, population studies have been so sporadic that there is no reliable way to track trends.

«Furthermore, in Western Hudson Bay at least, recent studies have confirmed that the ice is melting earlier, apparently in response to climate warming, and that both the condition of bears and their population size are declining (Stirling et al., 1999; Gagnon and Gough, 2005; Regehr et al., 2005; I. Stirling and N.J. Lunn, unpubl.

Steven C. Amstrup, the federal biologist who led an analysis last year concluding that the world's polar bear population could shrink two thirds by 2050 under moderate projections for retreating summer sea ice, is once again in the field along Alaska's Arctic coast, studying this year's brood of cubs, yearlings and mothers.

In a phone interview this morning, the lead author, Anthony Pagano, noted that the bear population in the study region, the southern Beaufort Sea, appears to be stable at about 1,500 animals.

Based on studies of radio - collared polar bears of the Beaufort Sea population between 1981 and 2000, 53 dens were located on the mainland coast of Alaska and Canada.

* Monitor polar bear populations and trends * Study polar bear feeding ecology * Work cooperatively with the Alaska Nanuuq Commission and the North Slope Borough for co-management of polar bears in Alaska * Provide technical assistance to the participants of the 1988 North Slope Borough Inuvialuit (In new vee al u it) Game Council Agreement for the conservation of polar bears in the southern Beaufort Sea region and monitor the effects of oil and gas operations in the Beaufort Sea region.

Robert F. Rockwell, a population biologist at the museum and City College of New York with whom Gormezano has collaborated in the Hudson Bay bear study, provided this reaction:

Other aspects of global warming's broad footprint on the world's ecosystems include changes in the abundance of more than 80 percent of the thousands of species included in population studies; major poleward shifts in living ranges as warm regions become hot, and cold regions become warmer; major increases (in the south) and decreases (in the north) of the abundance of plankton, which forms the critical base of the ocean's food chain; the transformation of previously innocuous insect species like the Aspen leaf miner into pests that have damaged millions of acres of forest; and an increase in the range and abundance of human pathogens like the cholera - causing bacteria Vibrio, the mosquito - borne dengue virus, and the ticks that carry Lyme disease - causing bacteria.

A bit more good news about polar bear populations, this time from an abundance study in the Southern Beaufort Sea.

Overall, and based on actual population studies, there is good evidence that polar bear numbers have increased, as Lawson said.

Models, not population studies are what see peril for polar bears.

Polar bears are one of the most sensitive Arctic marine mammals to climate warming because they spend most of their lives on sea ice.35 Declining sea ice in northern Alaska is associated with smaller bears, probably because of less successful hunting of seals, which are themselves ice - dependent and so are projected to decline with diminishing ice and snow cover.36, 37,38,39 Although bears can give birth to cubs on sea ice, increasing numbers of female bears now come ashore in Alaska in the summer and fall40 and den on land.41 In Hudson Bay, Canada, the most studied population in the Arctic, sea ice is now absent for three weeks longer than just a few decades ago, resulting in less body fat, reduced survival of both the youngest and oldest bears, 42 and a population now estimated to be in decline43 and projected to be in jeopardy.44 Similar polar bear population declines are projected for the Beaufort Sea region.45

Analysis of movement data from mark - recapture studies and tracking of adult female bears with satellite radio collars indicated that there are two populations of polar bears in the area, one that inhabits the west coast of Banks Island and Amundsen Gulf and a second that is resident along the mainland coast from about Baillie Islands in Canada to approximately Icy Cape in Alaska.

Based on such studies Dr. Derocher, chairman of the IUCN's Polar Bear Specialist Group (PBSG) warned, «It's clear from the research that's been done by myself and colleagues around the world that we're projecting that, by the middle of this century, two - thirds of the polar bears will be gone from their current populations».

The BioScience study also analyzed the arguments made by 45 science - based blogs about the impacts of global warming on polar bear populations.