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Tag: "showy" at biology news

Looks matter to female barn swallows

... have implications for the evolution and upkeep of showy ornamental traits -- such as a peacock's tail or a deer's antlers -- that are costly for males to maintain but give them an edge over rival males. "If females are assessing mates on a day-to-day basis, it explains why males continue to maintain costl...

Sudden change in social status triggers genetic response in male fish, study finds

...urtoni lives in a hierarchical social system where showy dominant males defend small territories that are used for courtship and breeding. However, dominance among male cichlids is reversible: If a subordinate successfully challenges a dominant male in a face-to-face confrontation, the dominant fish will l...

Fish can determine their social rank by observation alone, study finds

... their face. After a fight, the winner retains his showy appearance, but the loser's eyebar temporarily disappears as he tries to flee his more aggressive opponent. To test for transitive inference, the Stanford team took advantage of this reversible change in appearance by staging a series of short fi...

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

...y animals, males advertise to potential mates with showy traits, many of which are linked to testosterone l..., Sweden) finds that mating with males who possess showy traits ?such as bright colors or long tails and fins ?results in higher testosterone levels in males...

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(Date:8/22/2014)... discoveries in basic and clinical research and technological ... a complex offensive spanning multiple fronts. , Work ... could help find new and more selective therapies ... targets a specific enzyme overexpressed in certain cancersand ... brain tumours. , Chemistry professor Christopher Cairo and ...
(Date:8/22/2014)... to purchase fuel cell cars from Toyota and other ... cars will run on hydrogen made from natural gas, ... Now scientists at Stanford University have developed a low-cost, ... produce hydrogen by water electrolysis. The battery sends ... water into hydrogen and oxygen gas. Unlike other water ...
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(Date:8/22/2014)... The improved access to antiretroviral drugs ... developing world, has led to the decline in the ... due to AIDS globally. However, despite the fact that ... patients becoming affected by the virus is on the ... all related organisations and stakeholders, by 2015, significant investments ...
(Date:8/22/2014)... NJ. August 22, 2014. A new study ... persons with multiple sclerosis (MS) may be able ... The study was epublished ahead of print on ... Helen Genova, Hali Griswold, Nancy D. Chiaravalloti & ... persons with multiple sclerosis doi: 10.3233/NRE-141113). Self-awareness is ...
(Date:8/22/2014)... CLEVELAND Renal artery stenting to open blockages ... have historically been excluded from modern clinical trials, ... e-published in Catheterization and Cardiovascular Interventions ... Interventions (SCAI). , University Hospitals Case Medical Center,s ... and Professor of Medicine, Case Western Reserve University ...
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(Date:8/22/2014)... Many children get anxious or afraid when they have ... of ways that parents can make these shots easier ... step is to explain to children in an age-appropriate ... Rita John, director of the pediatric primary care nurse ... New York City. "Children need to know that ...
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