The nearly complete skeleton of a Steller's sea cow (Hydrodamalis gigas) - it is missing bones from the wrist and hand. From Woodward, 1885.
It did not take long for the last remaining population of Steller's sea cow to be driven into extinction. Discovered by the German naturalist Georg Steller around the Bering Sea's Commander Islands in 1741, this enormous and peculiar sirenian became an easy target for Russian hunters. By 1768, it was gone. (The marine mammal would not be scientifically ........ Read more »
Humans are generally considered the bad guys in the conservation world. But a new study suggests that ecosystem disturbances caused by people can sometimes be a boon to vulnerable species.
The authors examined the case of the hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species whose nests are frequently preyed upon by small Asian […] Read More »... Read more »
Leighton, P.A., Horrocks, J.A., & D.L. Kramer. (2010) Conservation and the scarecrow effect: Can human activity benefit threatened species by displacing predators?. Biological Conservation. DOI: 10.1016/j.biocon.2010.05.028
Last night I was reading about the latest Iressa (gefinitib) data in lung cancer published in the NEJM, but unfortunately the DOI code isn't yet available for easy tagging and linking of the article in Research Blogging, so it will...... Read more »
Over the weekend my family and I visited Amazon World Zoo Park on the Isle of Wight. I saw tons of new stuff and had a great time, but what might have been my favourite creature is one that would have been all but ignored by the vast majority of visitors. I'm talking about the Matamata Chelus fimbriatus*, a bizarre South American river turtle that is as amazing in biology and behaviour as it is in appearance. Amazon World had two of them...
Read the rest of this post... | Read the comments........ Read more »
Moen DS. (2006) Cope's rule in cryptodiran turtles: do the body sizes of extant species reflect a trend of phyletic size increase?. Journal of evolutionary biology, 19(4), 1210-21. PMID: 16780522
Well, I finished reading "Science and Values Influencing Predator Control for Alaska Moose." It was actually a very good read, with excellent cadence, even if I had heard all of this at conferences before. I've got a few general comments on this, but first I'll lay out the review a bit.
It comes in four five.
First, it reviews the relative effects of predation to other factors for moose. After... Read more »
Boertje, R., Keech, M., & Paragi, T. (2010) Science and Values Influencing Predator Control for Alaska Moose Management. Journal of Wildlife Management, 74(5), 917-928. DOI: 10.2193/2009-261
Genetics play a role in predicting if you'll respond to surveys. Over 1000 twin pairs were contacted through the Minnesota Twin Registry, and it was found that 45% of the variance in survey response behavior could be explained by genetic differences.... Read more »
The extent of migration among populations drives population structure. With enough migration, populations become homogeneous and behave as a single larger population. As migration rates decrease, populations drift apart and become differentiated. By measuring the amount of differentiation, we can determine the extent of migration between them. But what happens when there are unsampled [...]... Read more »
Audzijonyte, A., & Vrijenhoek, R. (2010) WHEN GAPS REALLY ARE GAPS: STATISTICAL PHYLOGEOGRAPHY OF HYDROTHERMAL VENT INVERTEBRATES. Evolution. DOI: 10.1111/j.1558-5646.2010.00987.x
Beerli, P. (2004) Effect of unsampled populations on the estimation of population sizes and migration rates between sampled populations. Molecular Ecology, 13(4), 827-836. DOI: 10.1111/j.1365-294X.2004.02101.x
SLATKIN, M. (2005) Seeing ghosts: the effect of unsampled populations on migration rates estimated for sampled populations. Molecular Ecology, 14(1), 67-73. DOI: 10.1111/j.1365-294X.2004.02393.x
The Look AHEAD (Action for Health in Diabetes) Trial is a large ongoing prospective trial on the long-term effect of weight management on outcomes in people with type 2 diabetes.
A paper just released online in the journal OBESITY features an article by Capri Foy and colleagues from the Look AHEAD trialists on the impact of intensive [...]... Read more »
Foy CG, Lewis CE, Hairston KG, Miller GD, Lang W, Jakicic JM, Rejeski WJ, Ribisl PM, Walkup MP, & Wagenknecht LE. (2010) Intensive Lifestyle Intervention Improves Physical Function Among Obese Adults With Knee Pain: Findings From the Look AHEAD Trial. Obesity (Silver Spring, Md.). PMID: 20559303
Sometimes, the scientific literature sucks at getting information to you.
I was looking at the table of contents of a new issue of The Journal of Crustacean Biology and saw an article about how to photograph soft-bodied crustaceans. Hm, I wonder why photographing soft-bodied crustaceans is difficult, I thought.
And the abstract mentioned software to deal with short focal planes by merging several pictures. The software is Helicon Focus.
Yes, I should be happy that I have found something usefu........ Read more »
Berejnov, V., Sinton, D., & Djilali, N. (2010) Structure of porous electrodes in polymer electrolyte membrane fuel cells: An optical reconstruction technique. Journal of Power Sources, 195(7), 1936-1939. DOI: 10.1016/j.jpowsour.2009.10.050
Hegna, T. (2010) Photography of Soft-Bodied Crustaceans via Drying, Whitening, and Splicing. Journal of Crustacean Biology, 30(3), 351-356. DOI: 10.1651/09-3253.1
Scannell, E., Dell'Ova, C., Quinlan, E., Murphy, A., & Kleckner, N. (2008) Pharmacology of ionotropic and metabotropic glutamate receptors on neurons involved in feeding behavior in the pond snail, Helisoma trivolvis. Journal of Experimental Biology, 211(5), 824-833. DOI: 10.1242/jeb.011866
I’ve mentioned before the considerable taxonomic challenges facing students of the family Buprestidae (jewel beetles) in North America, owing largely to fact that more than half of its species are assigned to one of just three hyper-diverse genera (Acmaeodera, Agrilus, and Chrysobothris). New species continue to be described, but the most recent comprehensive treatments of [...]... Read more »
Swift, I. P. . (2010) Nomenclatural changes in North American Phymatodes Mulsant (Coleoptera: Cerambycidae). Zootaxa, 35-52. info:/
Perhaps this research by Pero et al. can support small and medium sized companies with the design and redesign of its supply chain network.
The goal of the study was to analyze the connection between topological features of the supply chain and the resulting supply chain performance.
Method and Model
The authors used simulation techniques and statistical analysis to simulate a pull based supply network. The network consists of a retailer-, distributor- and manufacturer-level.
Demand and le........ Read more »
Pero, M., Rossi, T., Noé, C., & Sianesi, A. (2010) An exploratory study of the relation between supply chain topological features and supply chain performance. International Journal of Production Economics, 123(2), 266-278. DOI: 10.1016/j.ijpe.2009.08.030
I’ve been meaning to try out some barefoot running for a wee while now after watching this intriguing Nature video (which complements their paper) and I couldn’t have asked for a better opportunity than the past week on my hols in Scotland. The beaches of Galloway beckoned me as they stretched out at low tide. [...]... Read more »
Lieberman, D., Venkadesan, M., Werbel, W., Daoud, A., D’Andrea, S., Davis, I., Mang’Eni, R., & Pitsiladis, Y. (2010) Foot strike patterns and collision forces in habitually barefoot versus shod runners. Nature, 463(7280), 531-535. DOI: 10.1038/nature08723
It's not just for headaches anymore! The active ingredient in TYLENOL® (acetaminophen, also known as paracetamol) has been shown to ease the pain of social rejection. Wouldn't it be great if you could pop an over-the-counter medication to lessen the hurt of being excluded from that grad student party? Of being ostracized by all your old friends? Even disowned by your family? The journal article, which was promoted by press release six months ago, has finally appeared online (Dewall et al., 2010........ Read more »
Dewall CN, Macdonald G, Webster GD, Masten CL, Baumeister RF, Powell C, Combs D, Schurtz DR, Stillman TF, Tice DM.... (2010) Acetaminophen Reduces Social Pain: Behavioral and Neural Evidence. Psychological science : a journal of the American Psychological Society / APS. PMID: 20548058
Edward Vul, Christine Harris, Piotr Winkielman, . (2009) Voodoo Correlations in Social Neuroscience. Perspectives on Psychological Science.
Principles of Nuclear Magnetic Resonance Imaging made simple, both for the common men and for the professionals alike.... Read more »
Ian L. Pykett, Ph.D., Jeffrey H. Newhouse, M.D., Ferdinando S. Buonanno, M.D., Thomas J. Brady, M.D., Mark R. Goldman, M.D., J. Philip Kistler, M.D., & Gerald M. Pohost, M.D. (1982) Principles of Nuclear Magnetic Resonance Imaging. Radiology. info:/
fMRI experiments, with their small sample sizes, can easily fall victim to variability within the subject pool. This is especially true for patient studies. So it’s nice to step back and look at the big picture once in a...
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Richlan, F., Kronbichler, M., & Wimmer, H. (2009) Functional abnormalities in the dyslexic brain: A quantitative meta-analysis of neuroimaging studies. Human Brain Mapping, 30(10), 3299-3308. DOI: 10.1002/hbm.20752
PacBio has a paper in Nucleic Acid Research giving a few more details on sample prep and some limited sequencing quality data on their platform. The gist (which was largely in the previous Science paper) is that the templates are prepared by ligating a hairpin structure on to each end. In this paper they focused on a PCR product, with the primers designed with type IIS (BsaI) restriction sites flanking the insert. Digestion yields sticky ends (and with BsaI, these can be designed to be non-sym........ Read more »
Travers, K., Chin, C., Rank, D., Eid, J., & Turner, S. (2010) A flexible and efficient template format for circular consensus sequencing and SNP detection. Nucleic Acids Research. DOI: 10.1093/nar/gkq543
Our lab has recently found that active hamsters consume less alcohol suggesting that exercise is a healthy, effective, dopamine-rewarding substitute for alcohol and to treat alcohol addiction.... Read more »
Oslin, D., Berrettini, W., & O'Brien, C. (2006) Targeting treatments for alcohol dependence: the pharmacogenetics of naltrexone. Addiction Biology, 11(3-4), 397-403. DOI: 10.1111/j.1369-1600.2006.00036.x
Hammer, S., Ruby, C., Brager, A., Prosser, R., & Glass, J. (2010) Environmental Modulation of Alcohol Intake in Hamsters: Effects of Wheel Running and Constant Light Exposure. Alcoholism: Clinical and Experimental Research. DOI: 10.1111/j.1530-0277.2010.01251.x
A new fossil discovered by Yohannes Haile-Selassie has been announced this week in the PNAS. The partial skeleton, nick-named Kadanuumuu, or “Big Man,” is taxonomically consistent with other postcranial fossils belonging to Australopithecus afarensis. But, there are a few interesting and notable bones represented in this fossil which amend our understanding of how early Australopithecus [...]... Read more »
Haile-Selassie, Y., Latimer, B., Alene, M., Deino, A., Gibert, L., Melillo, S., Saylor, B., Scott, G., & Lovejoy, C. (2010) An early Australopithecus afarensis postcranium from Woranso-Mille, Ethiopia. Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.1004527107
A population of endangered marmots on Vancouver Island has turned from social to solitary, according to a study in the Journal of Animal Ecology.
The Vancouver Island marmot (Marmota vancouverensis) has undergone a drastic decline in the last few decades. To find out how the animals’ behavior might have changed, a team observed the population […] Read More »... Read more »
Brashares, J.S., Werner, J.R., & A.R.E. Sinclair. (2010) Social ‘meltdown’ in the demise of an island endemic: Allee effects and the Vancouver Island marmot. Journal of Animal Ecology. DOI: 10.1111/j.1365-2656.2010.01711.x
Back from my girlfriend-induced hiatus and onto a really interesting paper published ahead of print in the Journal of Neurophysiology. This work asks some questions, and postulates some answers, very similar to the line of thinking I’ve been going down recently – which is, of course, the main reason I find it interesting! (The other reason is that they used parabolic flights. Very cool.)One theory of how the brain performs complex movements in a dynamical environment – like, say, lifting o........ Read more »
Crevecoeur, F., McIntyre, J., Thonnard, J., & Lefevre, P. (2010) Movement Stability under Uncertain Internal Models of Dynamics. Journal of Neurophysiology. DOI: 10.1152/jn.00315.2010
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