Contact Information:

Media Contact

Vladimir Dinets
vdinets@utk.edu
865-974-3328

Twitter: UTKnoxville

http://www.tennessee.edu




Kredyty mieszkaniowe Kredyty mieszkaniowe

Sprawdź aktualny ranking najlepszych kredytów mieszkaniowych w Polsce - atrakcyjne kredytowanie nieruchomości.

PRESS-NEWS.org - Press Release Distribution
FREE PRESS RELEASES DISTRIBUTION
RSS - Press News Release
Add Press Release

UT study: Invasive brood parasites a threat to native bird species


2015-09-16
(Press-News.org) KNOXVILLE -- North Americans might be seeing new species of birds in certain areas of the continent in the near future. According to research conducted by a psychology professor at the University of Tennessee, Knoxville, and his co-authors, Eurasian birds are beginning to develop a presence on our continent, which could end up having a negative effect on native species.

Vladimir Dinets, research assistant professor of psychology, recently published a paper in the Journal of Field Ornithology examining the threats of global warming and its effects on wild animals. The warming climate is allowing various species in North America and Eurasia to get closer to, and even cross, the Bering Strait, a natural barrier only 50 miles wide. Birds from Eurasia, in particular, are crossing into North America.

Dinets, who has traveled extensively on both sides of the Bering Strait, notes that in the past 20 years, the vegetation of the region has changed dramatically. What used to be hundreds of miles of open tundra is now dense shrubland. And more southern bird species use this change to colonize new areas. For example, the savanna sparrow has recently begun breeding in Siberia, while the great spotted woodpecker has made it to Alaska for the first time.

Along with Mark Hauber, professor of neurobiology and behavior at City University of New York, and their co-authors, Dinets has discovered that two species of Eurasian cuckoos are on the verge of invading North America, and one of them may already be breeding here. These birds are considered brood parasites because they lay eggs into the nests of other birds and throw out the host's eggs to ensure there is no competition for food from the adoptive parents.

If these cuckoos become established in North America, the native bird population will decrease as a result. Some North American birds have evolved defenses against cowbirds, which are native brood parasites. But through their research, Dinets and Hauber have found that these defenses are likely to fail against the invasive cuckoos because cuckoos are more sophisticated parasites: for example, they can mimic the egg color of their hosts.

While the Eurasian cuckoos are threatening to invade North America, American cowbirds are increasing their presence in Eurasia. Many Eurasian birds have evolved defenses against cuckoos, but cowbirds are less picky about choosing their hosts, and might threaten other species that are not parasitized by cuckoos and have no defenses.

Dinets and Hauber are proposing to start monitoring when and where the invading cuckoos begin to breed in North America. They believe the foothold area will most likely be western Alaska, where a small number of people interested in birds are spread out over a large territory.

Dinets added that local fish and wildlife authorities, hunters and other people spending a lot of time outdoors should be taught to recognize Eurasian cuckoos in order to mitigate the effects when the cuckoos arrive.

"It is important to predict which native species are most at risk and to monitor their populations so that if they start to decline catastrophically, we can establish captive breeding programs and other supportive measures," he said.

INFORMATION:

To view the report on the research of Eurasian cuckoos invading North America, visit http://onlinelibrary.wiley.com/doi/10.1111/jofo.12111/abstract.

CONTACT:

Vladimir Dinets (865-974-3328, vdinets@utk.edu)

Lola Alapo (865-974-3993, lalapo@utk.edu)


ELSE PRESS RELEASES FROM THIS DATE:

Criminals acquire guns through social connections

2015-09-16
DURHAM, N.C. -- Criminals are far more likely to acquire guns from family and acquaintances than by theft, according to new studies by researchers at Duke University and the University of Chicago. "There are a number of myths about how criminals get their guns, such as most of them are stolen or come from dirty dealers. We didn't find that to be the case," said Philip J. Cook, a professor of public policy, economics and sociology at Duke's Sanford School of Public Policy. One study asked inmates of the Cook County Jail in Chicago how they obtained guns, while a second ...

Restoring ocean health

2015-09-16
More than a decade ago, California established marine protected areas (MPAs) in state waters around the northern Channel Islands off the coast of Santa Barbara. Several years later, the National Oceanic and Atmospheric Administration (NOAA) extended these MPAs into the federal waters of the Channel Islands National Marine Sanctuary. To evaluate whether the MPAs are meeting their ecological goals, marine scientists from the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) have been monitoring these rocky reef and kelp forest communities. Three UC Santa ...

Report: Cancer remains leading cause of death in US Hispanics

2015-09-16
ATLANTA -September 16, 2015- While cancer is the second leading cause of death overall in the United States, it remains the leading cause of death among U.S. Hispanics. The finding comes from "Cancer Statistics for Hispanics/Latinos," a comprehensive report produced every three years by the American Cancer Society and published in CA: A Cancer Journal for Clinicians. Hispanics/Latinos represent the largest racial/ethnic minority group in the United States, accounting for 17.4% of the total U.S. population in 2014. In 2015, 125,900 new cancer cases and 37,800 cancer deaths ...

Twin study suggests genetic factors contribute to insomnia in adults

2015-09-16
DARIEN, IL - A new study of twins suggests that insomnia in adults is partially explained by genetic factors, and this heritability is higher in females than in males. Results show that the genetic influences on insomnia symptoms in adults were substantial and largely stable over time while differing significantly by sex. In the longitudinal model, the estimated heritability of insomnia was 59 percent for females and 38 percent for males. "This study indicates that genes may play a larger role in the development of insomnia symptoms for women than for men, providing ...

To be fragrant or not: Why do some male hairstreak butterflies lack scent organs?

To be fragrant or not: Why do some male hairstreak butterflies lack scent organs?
2015-09-16
Female butterflies generally choose among male suitors, but in the tropics with hundreds of close relatives living in close proximity, how can they decide which males are the right ones? After all, if she mates with a male of another species, she is unlikely to have surviving offspring. One solution is that males of some species have scent producing organs on their wings, so if a male has the right smell, the female will presumably be receptive to his advances. Strangely, males of some species lack these scent producing organs, which would seem to be a huge disadvantage. ...

International team discovers natural defense against HIV

International team discovers natural defense against HIV
2015-09-16
EAST LANSING, Mich. - Researchers at Michigan State University were part of a team to discover a new natural defense against HIV infection. The team's discovery, featured in the current issue of the Journal of Biological Chemistry, focuses on ERManI, a protein that prevents the HIV virus from replicating. "In earlier studies, we knew that we could interfere with the spread of HIV-1, but we couldn't identify the mechanism that was stopping the process," said Yong-Hui Zheng, MSU associate professor of microbiology and molecular genetics and co-author of the study. "We ...

Bolivian biodiversity observatory takes its first steps

2015-09-16
NEW YORK - September 16, 2015 - EcoHealth Alliance, an environmental health nonprofit organization that focuses on local conservation and global health issues, announced the creation of the first centralized repository to collect data on the biological diversity in Bolivia. EcoHealth Alliance Senior Scientist, Carlos Zambrana-Torrelio, in collaboration with Miguel Fernandez from the German Centre for Integrative Biodiversity Research in coordination with more than 40 Bolivian scientists worked together to create the unique repository. The value of a biological repository ...

Choice of college major influences lifetime earnings more than simply getting a degree

2015-09-16
LAWRENCE -- A new study based on longitudinal data confirms a college degree provides an advantage in lifetimes earnings, but a related decision once students make it to college could prove to be even more crucial. The study that includes a University of Kansas researcher found large lifetime earnings gaps depending on a student's field of study. For examples, men who major in science, technology, engineering and mathematics, or STEM fields, and earning a bachelor's degree achieved roughly $700,000 to $800,000 higher 40-year lifetime earnings from ages 20 to 59 than social ...

Dominant strain of drug-resistant MRSA decreases in hospitals, but persists in community

2015-09-16
The incidence of the most common strain of Methicillin-resistant Staphylococcus aureus (MRSA) infections has decreased in hospital-onset cases, but has failed to decline in the broader community, according to new research published online today in Infection Control & Hospital Epidemiology, the journal of the Society for Healthcare Epidemiology of America. The USA 300 strain of MRSA, has become prevalent in both communities and healthcare institutions. "In looking at risk factors for hospital or community-onset USA 300, current or former drug use was a strong predictor ...

Synthetic biology needs robust safety mechanisms before real world application

2015-09-16
Amsterdam, September 16, 2015 - Targeted cancer treatments, toxicity sensors and living factories: synthetic biology has the potential to revolutionize science and medicine. But before the technology is ready for real-world applications, more attention needs to be paid to its safety and stability, say experts in a review article published in Current Opinion in Chemical Biology. Synthetic biology involves engineering microbes like bacteria to program them to behave in certain ways. For example, bacteria can be engineered to glow when they detect certain molecules, and ...

LAST 30 PRESS RELEASES:

How your brain decides blame and punishment -- and how it can be changed

Uniquely human brain region enables punishment decisions

Pinpointing punishment

Chapman University publishes research on attractiveness and mating

E-cigarettes: Special issue from Nicotine & Tobacco Research

Placental problems in early pregnancy associated with 5-fold increased risk of OB & fetal disorders

UT study: Invasive brood parasites a threat to native bird species

Criminals acquire guns through social connections

Restoring ocean health

Report: Cancer remains leading cause of death in US Hispanics

Twin study suggests genetic factors contribute to insomnia in adults

To be fragrant or not: Why do some male hairstreak butterflies lack scent organs?

International team discovers natural defense against HIV

Bolivian biodiversity observatory takes its first steps

Choice of college major influences lifetime earnings more than simply getting a degree

Dominant strain of drug-resistant MRSA decreases in hospitals, but persists in community

Synthetic biology needs robust safety mechanisms before real world application

US defense agencies increase investment in federal synthetic biology research

Robots help to map England's only deep-water Marine Conservation Zone

Mayo researchers identify protein -- may predict who will respond to PD-1 immunotherapy for melanoma

How much water do US fracking operations really use?

New approach to mammograms could improve reliability

The influence of citizen science grows despite some resistance

Unlocking secrets of how fossils form

What happens on the molecular level when smog gets into the lungs?

Using ultrasound to clean medical instruments

Platinum and iron oxide working together get the job done

Tiny silica particles could be used to repair damaged teeth, research shows

A quantum lab for everyone

No way? Charity's logo may influence perception of food in package

[Press-News.org] UT study: Invasive brood parasites a threat to native bird species
Press-News.org is a service of DragonFly Company. All Rights Reserved.
Issuers of news releases are solely responsible for the accuracy of their content.