tags: evolution, evolutionary biology, gynandromorph, bilateral gynandromorph bird, half-sider, mixed-sex chimaera, sex determination, molecular biology, genetics, developmental biology, endocrinology, birds, chicken, Gallus gallus, ornithology, bpr3.org/?p=52,peer-reviewed research, peer-reviewed paper, journal club
Almost exactly one year ago, hundreds of American birders
were thrilled by sightings and photographs of this remarkable
Northern Cardinal, or Redbird, Cardinali........ Read more »
Zhao, D., McBride, D., Nandi, S., McQueen, H., McGrew, M., Hocking, P., Lewis, P., Sang, H., & Clinton, M. (2010) Somatic sex identity is cell autonomous in the chicken. Nature, 464(7286), 237-242. DOI: 10.1038/nature08852
Advertisers research our auditory capacity to be influenced.... Read more »
Plassmann, H., O'Doherty, J., Shiv, B., & Rangel, A. (2008) Marketing actions can modulate neural representations of experienced pleasantness. Proceedings of the National Academy of Sciences, 105(3), 1050-1054. DOI: 10.1073/pnas.0706929105
Regular readers of Obesity Panacea will know that I am a huge fan of active transportation (e.g. walking or cycling to work, rather than commuting by vehicle). I just can't say enough good things about it. It often takes about the same amount of time as commuting by vehicle, plus it ensures that you're getting at least some physical activity on even the busiest days. Even just taking transit instead of driving yourself increases your chances of meeting the daily physical activity gu........ Read more »
Wilkinson, P., Smith, K., Davies, M., Adair, H., Armstrong, B., Barrett, M., Bruce, N., Haines, A., Hamilton, I., & Oreszczyn, T. (2009) Public health benefits of strategies to reduce greenhouse-gas emissions: household energy. The Lancet, 374(9705), 1917-1929. DOI: 10.1016/S0140-6736(09)61713-X
Some advice on how to deal with students and postdocs...... Read more »
When it comes to aliens, Hollywood really does not have much imagination. Most extraterrestrials that have appeared on the big screen look very much like us, or are at least some kind of four-to-six-limbed vertebrate, and this says more about out own vanity than anything else. It would be far more interesting, I think, to take the weird and wonderful organisms of the Cambrian as inspiration for alien life forms, and two new critters have just been added to the odd Cambrian menagerie. Read the ........ Read more »
Caron, J., Conway Morris, S., & Shu, D. (2010) Tentaculate Fossils from the Cambrian of Canada (British Columbia) and China (Yunnan) Interpreted as Primitive Deuterostomes. PLoS ONE, 5(3). DOI: 10.1371/journal.pone.0009586
STEIN, M. (2010) A new arthropod from the Early Cambrian of North Greenland, with a ‘great appendage’-like antennula. Zoological Journal of the Linnean Society, 158(3), 477-500. DOI: 10.1111/j.1096-3642.2009.00562.x
Over and over again the same dinosaurs show up in the news: Tyrannosaurus, Triceratops, Apatosaurus, Velociraptor, etc., etc., etc. Movies, books and television have made them into superstars, but we should not forget that these dinosaurs represent only a small part of the range of dinosaur diversity. There are many kinds of dinosaurs many people [...]... Read more »
by Katie Hill in Promega Connections
I woke up this morning and worried about my 2 year-old son, Odin. Is he eating enough leafy greens? Is he socializing well with others? Is this demanding and snarky attitude he is newly exhibiting a permanent part of his personality? Will ramming his head into the table while playing soccer in the house prevent [...]... Read more »
Narita, K., Takei, Y., Suda, M., Aoyama, Y., Uehara, T., Kosaka, H., Amanuma, M., Fukuda, M., & Mikuni, M. (2010) Relationship of parental bonding styles with gray matter volume of dorsolateral prefrontal cortex in young adults. Progress in Neuro-Psychopharmacology and Biological Psychiatry. DOI: 10.1016/j.pnpbp.2010.02.025
by Vincent Racaniello in virology blog
The second RNA segment of some influenza virus strains encodes a protein called PB1-F2 that might contribute to virulence. Speaking about the 2009 pandemic H1N1 strain, Peter Palese noted that “If this virulence marker is necessary for an influenza virus to become highly pathogenic in humans or in chickens, then the current swine virus doesn’t [...]... Read more »
Hai, R., Schmolke, M., Varga, Z., Manicassamy, B., Wang, T., Belser, J., Pearce, M., Garcia-Sastre, A., Tumpey, T., & Palese, P. (2010) PB1-F2 expression by the 2009 pandemic H1N1 influenza virus has minimal impact on virulence in animal models. Journal of Virology. DOI: 10.1128/JVI.02717-09
Music has a bizarre power to engage and affect us – to move us emotionally or literally, whether it’s foot-tapping, finger-drumming or booty-shaking. It seems to have properties that make it automatically and powerfully salient for human beings. An obvious question is whether this reflects some innate properties of the human brain or whether it emerges over time due to experience with types of music. Put another way, does the brain shape the music or the other way around?........ Read more »
Perani, D., Saccuman, M., Scifo, P., Spada, D., Andreolli, G., Rovelli, R., Baldoli, C., & Koelsch, S. (2010) Functional specializations for music processing in the human newborn brain. Proceedings of the National Academy of Sciences, 107(10), 4758-4763. DOI: 10.1073/pnas.0909074107
Sun, T. (2005) Early Asymmetry of Gene Transcription in Embryonic Human Left and Right Cerebral Cortex. Science, 308(5729), 1794-1798. DOI: 10.1126/science.1110324
For as long as the brain has been seen as the site of mental activity, it has followed that altering brain function should be implemented to treat mental illness. Second generation antidepressants and psychotherapy are currently the least invasive ways of affecting brain function but they leave too many patients only partially improved, and have [...]... Read more »
Lakhan, S., & Callaway, E. (2010) Deep brain stimulation for obsessive-compulsive disorder and treatment-resistant depression: systematic review. BMC Research Notes, 3(1), 60. DOI: 10.1186/1756-0500-3-60
The theory of planned behavior (TPB) has been applied to many areas of research in physical activity with varying degrees of success I would argue. This paper looks at the ability of TPB to predict participation in physical activity and explored the development of activity habits in a 12-week study. Gym members completed standard theory of planned behavior measures at baseline and follow-up. The author argues that the results showed that perceived behavioralcontrol was significantly predictive........ Read more »
Armitage, C. (2005) Can the Theory of Planned Behavior Predict the Maintenance of Physical Activity?. Health Psychology, 24(3), 235-245. DOI: 10.1037/0278-6184.108.40.206
“Episode de la fièvre jaune”
By analyzing hepatitis C virus genome sequences, you can trace the virus’s history through its spread by the slave trade, and linked 19th-century health models in different countries to viral spread and transmission. Similarly, by looking at leprosy DNA, you can track its spread along the Silk Road and along [...]... Read more »
Bryant, J., Holmes, E., & Barrett, A. (2007) Out of Africa: A Molecular Perspective on the Introduction of Yellow Fever Virus into the Americas. PLoS Pathogens, 3(5). DOI: 10.1371/journal.ppat.0030075
Barrett, A., & Higgs, S. (2007) Yellow Fever: A Disease that Has Yet to be Conquered. Annual Review of Entomology, 52(1), 209-229. DOI: 10.1146/annurev.ento.52.110405.091454
Sall, A., Faye, O., Diallo, M., Firth, C., Kitchen, A., & Holmes, E. (2009) Yellow Fever Virus Exhibits Slower Evolutionary Dynamics than Dengue Virus. Journal of Virology, 84(2), 765-772. DOI: 10.1128/JVI.01738-09
The disease brucellosis is surging in free-ranging elk populations in the Greater Yellowstone Ecosystem according to a new study in the journal Ecological Applications.
Furthermore, efforts to address the problem by reducing the density of elk populations through increased hunting or introduction of natural predators will be difficult given the matrix of private and public lands where elk aggregate.... Read more »
Cross, P., Cole, E., Dobson, A., Edwards, W., Hamlin, K., Luikart, G., Middleton, A., Scurlock, B., & White, P. (2010) Probable causes of increasing brucellosis in free-ranging elk of the Greater Yellowstone Ecosystem. Ecological Applications, 20(1), 278-288. DOI: 10.1890/08-2062.1
The standard litany against the Green Revolution is that it failed to banish hunger because the technologies it ushered in were no use to small peasant farmers. Farmers with access to cash and good land did well, but poorer farmers on marginal land got nothing out of the revolution, and if they did somehow [...]... Read more »
Harwood, J. (2009) Peasant Friendly Plant Breeding and the Early Years of the Green Revolution in Mexico. Agricultural History, 83(3), 384-410. DOI: 10.3098/ah.2009.83.3.384
When it comes to avoiding infection, a growing body of evidence suggests we don't just have a physiological immune system, we also have a behavioural immune system - one that alerts us to people likely to be carrying disease, and that puts us off interacting with them. Indeed, there's research showing that people who are more fearful of disease tend to hold more xenophobic attitudes and to display greater prejudice towards people with outwardly visible disabilities. Now Chad Mortensen and his co........ Read more »
Mortensen, C., Becker, D., Ackerman, J., Neuberg, S., & Kenrick, D. (2010) Infection Breeds Reticence: The Effects of Disease Salience on Self-Perceptions of Personality and Behavioral Avoidance Tendencies. Psychological Science, 21(3), 440-447. DOI: 10.1177/0956797610361706
Professor Karl Friston is one of the most prominent (and prolific) researchers in the field of neuroimaging. His contributions to methodological development in functional magnetic resonance imaging (fMRI) are immense:He invented statistical parametric mapping; SPM is an international standard for analysing imaging data and rests on the general linear model and random field theory (developed with Keith Worsley). In 1994, his group developed voxel-based morphometry. VBM detects differences in n........ Read more »
Carhart-Harris, R., & Friston, K. (2010) The default-mode, ego-functions and free-energy: a neurobiological account of Freudian ideas. Brain. DOI: 10.1093/brain/awq010
Galaxies are made of stars, and stars are made of... gas. So a large part of understanding how galaxies evolve and grow is understanding how much "gas" (literally, not "gasoline") is present in galaxies – but has not yet been incorporated in stars – at different periods in the history of the universe.What periods of the universe are most interesting in this regard? The answer is: periods somewhat less than the first half of the universe's existence since the time of the big bang, rou........ Read more »
Tacconi, L., Genzel, R., Neri, R., Cox, P., Cooper, M., Shapiro, K., Bolatto, A., Bouché, N., Bournaud, F., Burkert, A.... (2010) High molecular gas fractions in normal massive star-forming galaxies in the young Universe. Nature, 463(7282), 781-784. DOI: 10.1038/nature08773
Well well well. Here we are. It's Friday. And we've been talking about SPERM ALL WEEK.
What to do...what to do...
Nel-Themaat et al. "Quality and freezing qualities of ﬁrst and second ejaculates collected from endangered Gulf Coast Native rams" Animal Reproduction Science, 2006.
So it turns out that the people who wrote the study Sci covered the other week wrote ANOTHER one. Also, it turns out the eland is not endangered, but the other species they were working with, the Gulf Co........ Read more »
NELTHEMAAT, L., HARDING, G., CHANDLER, J., CHENEVERT, J., DAMIANI, P., FERNANDEZ, J., HUMES, P., POPE, C., & GODKE, R. (2006) Quality and freezing qualities of first and second ejaculates collected from endangered Gulf Coast Native rams. Animal Reproduction Science, 95(3-4), 251-261. DOI: 10.1016/j.anireprosci.2005.09.014
A number of interesting revelations to be had here, and all to do with our choices of ‘mate’.
And by mate, I don’t mean the antipodean colloquialism meaning ‘friend’. Nope, I mean mate as in, you know, someone you want to shag. As it were.
The first revelation in this paper* is that, for the most part, [...]
[Click on the hyperlinked headline for more of the goodness]... Read more »
Lass-Hennemann, J., Deuter, C., Kuehl, L., Schulz, A., Blumenthal, T., & Schachinger, H. (2010) Effects of stress on human mating preferences: stressed individuals prefer dissimilar mates. Proceedings of the Royal Society B: Biological Sciences. DOI: 10.1098/rspb.2010.0258
The goal of the study was to analyze risk in a global supply chain, especially originating from labor dissatisfaction and turnover. The results were obtained using a survey of workers in the Chinese Pearl River Delta region. The methodology is presented precisely and comprehensively. ... Read more »
Jiang, B., Baker, R., & Frazier, G. (2009) An analysis of job dissatisfaction and turnover to reduce global supply chain risk: Evidence from China. Journal of Operations Management, 27(2), 169-184. DOI: 10.1016/j.jom.2007.09.002
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