Lest we forget, one of my aims for 2009-2010 is TO GET THROUGH ALL THE TOADS OF THE WORLD. I don't mean every single species (because there... like, over 540 of them), but all the 'genera' at least. If you need any of the background to this grand/crazy scheme, be sure to check out the links below [image below shows Mt Kukenan in the Guyanan Highlands, and a Pebble toad Oreophrynella niger rolling downhill. Read on...].
One of the main points I've emphasised in some of the previous articles........ Read more »
McDiarmid, R. W., & Gorzula, S. (1989) Aspects of the reproductive ecology and behavior of the Tepui toads, genus Oreophrynella (Anura, Bufonidae. Copeia, 445-451. info:/
“The real question is not whether machines think but whether men do. The mystery which surrounds a thinking machine already surrounds a thinking man.”–B. F. Skinner. The study of mind begins with a metaphor. In the 20th century (and now on into the 21st) the metaphor that has dominated our study of mind is the [...]... Read more »
Rescorla, R. (1988) Pavlovian conditioning: It's not what you think it is. American Psychologist, 43(3), 151-160. DOI: 10.1037//0003-066X.43.3.151
We all hold beliefs that are not provable, and defining when these beliefs cross the line and become psychotic delusions is not easy. It's clear that such a line does exist, however: every town has its share of people whose religious beliefs fall sufficiently far outside the conventional that they are declared psychotic.
In popular imagination, at least, psychotic delusions often have a religious component. In reality, many psychotic delusions are not religious. However, many delusions involve ........ Read more »
Mohr, S., Borras, L., Betrisey, C., Pierre-Yves, B., Gilliéron, C., & Huguelet, P. (2010) Delusions with Religious Content in Patients with Psychosis: How They Interact with Spiritual Coping. Psychiatry: Interpersonal , 73(2), 158-172. DOI: 10.1521/psyc.2010.73.2.158
Many animal species employ a polyandrous sexual system, where one female mates with many males and stores sperm in a specialized storage organ. Since fertilization doesn’t take place immediately (in some cases females can store viable sperm for several weeks), males actively compete to contribute to her sperm bank, regardless of whether it requires another [...]... Read more »
Lieshout, E. (2010) Male genital length and mating status differentially affect mating behaviour in an earwig. Behavioral Ecology and Sociobiology. DOI: 10.1007/s00265-010-1021-1
Today we are going to step into the time machine and go back 21 years to 1989. It was in this year that the study to become known as the “Marshmallow experiment” was published. Performed by Walter Mischel at Stanford University this experiment showed an amazing thing, that testing a child’s self-control at 4yrs could [...]... Read more »
Cultural differences are often attributed to events far removed from genetics. The basis for this belief is often based on the assertion that if you take an individual, at birth, from one society and implant them in another, then they will generally grow up to become well-adjusted to their adopted culture. Whilst this is more than . . . → Read More: Genetic Components and Cultural Differences: The social sensitivity hypothesis... Read more »
Way, B., & Lieberman, M. (2010) Is there a genetic contribution to cultural differences? Collectivism, individualism and genetic markers of social sensitivity. Social Cognitive and Affective Neuroscience, 5(2-3), 203-211. DOI: 10.1093/scan/nsq059
Years ago, the relationship between depression and chronic pain was the hot topic, and it’s only more recently that anxiety and pain have become popular. So slightly tangentially, but I think you’ll see how it relates, today I want to muse a bit about health anxiety and some of the findings from this interesting area … Read more... Read more »
Muse, K., McManus, F., Hackmann, A., Williams, M., & Williams, M. (2010) Intrusive imagery in severe health anxiety: Prevalence, nature and links with memories and maintenance cycles. Behaviour Research and Therapy, 48(8), 792-798. DOI: 10.1016/j.brat.2010.05.008
Sharks consistently rank near the top of lists of American’s greatest fears. In reality, they have much more to fear from us than we do from them. Because of our actions, many species of sharks are on the verge of extinction. A recent International Union for the Conservation of Nature Shark Specialist Group report [...]... Read more »
Baum, J. (2003) Collapse and Conservation of Shark Populations in the Northwest Atlantic. Science, 299(5605), 389-392. DOI: 10.1126/science.1079777
Bonfil, R. (2005) Transoceanic Migration, Spatial Dynamics, and Population Linkages of White Sharks. Science, 310(5745), 100-103. DOI: 10.1126/science.1114898
Clarke, S., McAllister, M., Milner-Gulland, E., Kirkwood, G., Michielsens, C., Agnew, D., Pikitch, E., Nakano, H., & Shivji, M. (2006) Global estimates of shark catches using trade records from commercial markets. Ecology Letters, 9(10), 1115-1126. DOI: 10.1111/j.1461-0248.2006.00968.x
Conrath, C., & Musick, J. (2007) The Sandbar Shark Summer Nursery within Bays and Lagoons of the Eastern Shore of Virginia. Transactions of the American Fisheries Society, 136(4), 999-1007. DOI: 10.1577/T06-107.1
Dulvy, N., Baum, J., Clarke, S., Compagno, L., Cortés, E., Domingo, A., Fordham, S., Fowler, S., Francis, M., Gibson, C.... (2008) You can swim but you can't hide: the global status and conservation of oceanic pelagic sharks and rays. Aquatic Conservation: Marine and Freshwater Ecosystems, 18(5), 459-482. DOI: 10.1002/aqc.975
Musick, JA. (2000) Management of Sharks and their relatives (Elasmobranchii). Fisheries. info:/
Pikitch, E., Chapman, D., Babcock, E., & Shivji, M. (2005) Habitat use and demographic population structure of elasmobranchs at a Caribbean atoll (Glovers Reef, Belize). Marine Ecology Progress Series, 187-197. DOI: 10.3354/meps302187
Topelko, K., & Dearden, P. (2005) The Shark Watching Industry and its Potential Contribution to Shark Conservation. Journal of Ecotourism, 4(2), 108-128. DOI: 10.1080/14724040409480343
Walker, T. (1998) Can shark resources be harvested sustainably? A question revisited with a review of shark fisheries. Marine and Freshwater Research, 49(7), 553. DOI: 10.1071/MF98017
Ellen van Wilgenburg (University of Melbourne, Australia) and coworkers have shown that ants can sometimes discriminate between highly similar carbon-based compounds, depending on molecular chain length and branching unit position. This news feature was written on August 9, 2010.... Read more »
van Wilgenburg, E., Sulc, R., Shea, K. J., & Tsutsui, N. D. (2010) Deciphering the Chemical Basis of Nestmate Recognition. Journal of Chemical Ecology, 36(7), 751-758. DOI: 10.1007/s10886-010-9812-4
Last month I wrote about how electrical stimulation of the hippocampus causes temporary amnesia - Zapping Memories Away.Now Toronto neurologists Laxton et al have tried to use deep brain stimulation (DBS) to improve memory in people with Alzheimer's disease. Progressive loss of memory is the best-known symptom of this disorder, and while some drugs are available, they provide partial relief at best.This study stems from a chance discovery by the same Toronto group. In 2008, they reported that st........ Read more »
Laxton AW, Tang-Wai DF, McAndrews MP, Zumsteg D, Wennberg R, Keren R, Wherrett J, Naglie G, Hamani C, Smith GS.... (2010) A phase I trial of deep brain stimulation of memory circuits in Alzheimer's disease. Annals of neurology. PMID: 20687206
by Mary in OpenHelix
Every so often something comes up in your weekly literature search that makes you go: huh. That happened to me today with a paper on text mining. Now, I have used a variety of text-mining tools (Textpresso, iHOP, PubMatrix, XplorMed, etc are among the ones we have subscription tutorials on) and they have all sorts of strengths and weaknesses. And I’m convinced of the utility of them for making new connections, finding related literature, examining over-represented terms, etc. Because of ........ Read more »
Ishii, N., Koike, A., Yamamoto, Y., & Takagi, T. (2010) Figure classification in biomedical literature to elucidate disease mechanisms, based on pathways. Artificial Intelligence in Medicine, 49(3), 135-143. DOI: 10.1016/j.artmed.2010.04.005
Scientists from the University of Halifax in Nova Scotia, Canada have discovered photosynthetic algae living inside embryonic cells of the spotted salamander, providing them with extra power like a mean green energy drink. If true, this is the first known example of a vertebrate acquiring a new symbiont.
The spotted salamander [...]... Read more »
Henrey Orr. (1888) Note on the development of amphibians, chiefly concerning the central nervous system; with additional observations on the hypophysis, mouth, and the appendages and skeleton of the head. Quarterly Journal of Microscopical Science. info:/
Gilbert, P. (1944) The Alga-Egg Relationship in Ambystoma Maculatum, A Case of Symbiosis. Ecology, 25(3), 366. DOI: 10.2307/1931284
I seem to be in a bit of an ecosystem mood lately. Having looked at the effect of trees on the soil microbiome last week, today I'm looking at how the communities of soil bacteria are effected by a much greater disaster, forest fires. Bacteria are admittedly not the first thing most people think of in this situationTurning a large area of huge leafy richness into smoking remains covering an ash filled wasteland has many far-reaching effects on animals and plants alike, but the effect on bacteria........ Read more »
Ball, P., MacKenzie, M., DeLuca, T., & Montana, W. (2010) Wildfire and Charcoal Enhance Nitrification and Ammonium-Oxidizing Bacterial Abundance in Dry Montane Forest Soils. Journal of Environment Quality, 39(4), 1243. DOI: 10.2134/jeq2009.0082
These four papers all attempt to understand what controls the sediments that make up the streambed and floodplain and that get preserved in the geologic record. White et al. look at how riffle positions are governed by valley width variations, while Jerolmack and Brzinski find striking similarities in grain size transitions observed in rivers and dune fields. Hart et al. examine the relationship between glacial advances and downstream sediment deposition, while Sambrook Smith et al. investigate ........ Read more »
White, J., Pasternack, G., & Moir, H. (2010) Valley width variation influences riffle–pool location and persistence on a rapidly incising gravel-bed river. Geomorphology, 121(3-4), 206-221. DOI: 10.1016/j.geomorph.2010.04.012
Jerolmack, D., & Brzinski, T. (2010) Equivalence of abrupt grain-size transitions in alluvial rivers and eolian sand seas: A hypothesis. Geology, 38(8), 719-722. DOI: 10.1130/G30922.1
Hart, S., Clague, J., & Smith, D. (2010) Dendrogeomorphic reconstruction of Little Ice Age paraglacial activity in the vicinity of the Homathko Icefield, British Columbia Coast Mountains, Canada. Geomorphology, 121(3-4), 197-205. DOI: 10.1016/j.geomorph.2010.04.011
Sambrook Smith, G., Best, J., Ashworth, P., Lane, S., Parker, N., Lunt, I., Thomas, R., & Simpson, C. (2010) Can we distinguish flood frequency and magnitude in the sedimentological record of rivers?. Geology, 38(7), 579-582. DOI: 10.1130/G30861.1
We humans are masters of reinvention. And we love our dogs. Over the past 12,000 years we’ve mixed that love of innovation and love of dogs, to create a species with more physical variation than any other species on Earth. Much of this innovation has served us well. Domesticated dogs have protected our livestock and [...]... Read more »
Roberts T, McGreevy P, & Valenzuela M. (2010) Human induced rotation and reorganization of the brain of domestic dogs. PloS one, 5(7). PMID: 20668685
by Welkin Johnson in Small Things Considered
by Welkin Johnson It looks like a herpesvirus, but does it replicate like one? Electronmicrographs showing mature HHV-6 particles emerging from an infected cell. Source. Sometimes, discovery in biology is about discerning rules and sometimes it is about pursuing exceptions. In this spirit, Human Herpesvirus six (HHV-6), the etiologic agent of the common childhood illness roseola infantum, is shaping up...... Read more »
Arbuckle JH, Medveczky MM, Luka J, Hadley SH, Luegmayr A, Ablashi D, Lund TC, Tolar J, De Meirleir K, Montoya JG.... (2010) The latent human herpesvirus-6A genome specifically integrates in telomeres of human chromosomes in vivo and in vitro. Proceedings of the National Academy of Sciences of the United States of America, 107(12), 5563-8. PMID: 20212114
In a previous post, I suggested that writers were brain manipulators. Now I'm refining the description. It's more like a Vulcan mind meld.
A recent experiment by scientists at Princeton University shows neural coupling (coordinated brain activity) between a storyteller and a listener. The researchers used fMRI to scan a speaker’s brain as she told an unrehearsed story about an experience from high school. They then scanned 10 volunteers as they listened to a recording of the story.
The ba........ Read more »
Stephens GJ, Silbert LJ, & Hasson U. (2010) Speaker-listener neural coupling underlies successful communication. Proceedings of the National Academy of Sciences of the United States of America. PMID: 20660768
Between 23 and 16 million years ago, just outside of where the city of Lisbon, Portugal sits today, there lived a unique mix of mammals which would have seemed both strange and familiar. From bones and footprints left in fossilized feces, paleontologists have found that rhinoceros, deer, horses, antelope, and elephants browsed and grazed in [...]... Read more »
ANTUNES, M., BALBINO, A., & GINSBURG, L. (2006) Ichnological evidence of a Miocene rhinoceros bitten by a bear-dog (Amphicyon giganteus). Annales de Paléontologie, 92(1), 31-39. DOI: 10.1016/j.annpal.2005.10.002
ANTUNES, M., BALBINO, A., & GINSBURG, L. (2006) Miocene Mammalian footprints in coprolites from Lisbon, Portugal. Annales de Paléontologie, 92(1), 13-30. DOI: 10.1016/j.annpal.2005.09.002
Christine Argot. (2010) Morphofunctional analysis of the postcranium of Amphicyon major (Mammalia, Carnivora, Amphicyonidae) from the Miocene of Sansan(Gers, France) compared to three extant carnivores: Ursus arctos, Panthera leo, and Canis lupus. Geodivertistas, 32(1), 65-106. info:/
Sci had a chance to blog an interesting paper on the value of cocaine in rats (as compared to nice stuff like sugar), and someone pointed out to her that she authors had done a follow up! I think what they found in this followup is really rather exciting and has some very interesting implications [...]... Read more »
Cantin L, Lenoir M, Augier E, Vanhille N, Dubreucq S, Serre F, Vouillac C, & Ahmed SH. (2010) Cocaine is low on the value ladder of rats: possible evidence for resilience to addiction. PloS one, 5(7). PMID: 20676364
Nowadays green logistics is an often heard buzz-word, but already eleven years ago Beamon published an article about the challenges with creating Green Supply Chains.
Traditional vs. Extended Supply Chain
A traditional supply chain has been mostly a one-way street. The issues analyzed were eg. the number of echelons, buyer-supplier relationships and inventory levels.
As a basis the extended supply chain has to consider at least the recycling / re-use and remanufacturing processes to be com........ Read more »
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