Below, a couple other papers that appeared in Hawks's citeulike feed.
The biological standard of living in Europe during the last two millennia: "We find that heights stagnated in Central, Western and Southern Europe during the Roman imperial period, while astonishingly increasing in the fifth and sixth centuries."
New Light on the "Dark Ages": The Remarkably Tall Stature of Northern European Men during the Medieval Era: "Based on a modest sample of skeletons from northern Europe, average heights fell from 173.4 centimeters in the early Middle Ages to a low of roughly 167 centimeters during the seventeenth and eighteenth centuries. [. . .] It is plausible to link the decline in average height to climate deterioration; growing inequality; urbanization and the expansion of trade and commerce, which facilitated the spread of diseases; fluctuations in population size that impinged on nutritional status; the global spread of diseases associated with European expansion and colonization; and conflicts or wars over state building or religion."
The way individuals pair to produce reproductive units is a major factor determining evolution. This process is complex because it is determined not only by individual mating preferences, but also by numerous other factors such as competition between mates. Consequently, preferred and actual characteristics of mates obtained should differ, but this has rarely been addressed. We simultaneously measured mating preferences for stature, body mass, and body mass index, and recorded corresponding actual partner's characteristics for 116 human couples from France. Results show that preferred and actual partner's characteristics differ for male judges, but not for females. In addition, while the correlation between all preferred and actual partner's characteristics appeared to be weak for female judges, it was strong for males: while men prefer women slimmer than their actual partner, those who prefer the slimmest women also have partners who are slimmer than average. This study therefore suggests that the influences of preferences on pair formation can be sex-specific. It also illustrates that this process can lead to unexpected results on the real influences of mating preferences: traits considered as highly influencing attractiveness do not necessarily have a strong influence on the actual pairing, the reverse being also possible.
|Net Worth||No. of child- ren|
|n||Total billions||Pct of total||Mean||Median||Age|
[Correction: Moved Frost to Jewish section; updated statistics accordingly.]
Forbes has published its list of the 400 richest Americans for this year. My current estimate of the ethnic breakdown of the list is shown in the far right column below:
|1987 (%) ||2009 (%) ||2010 (%) |
|Northwestern European ||72 ||52.25 ||51 |
|Jewish ||23 ||35 ||35 |
|Italian ||2.25 ||3.5 ||4.25 |
|East Asian ||0.25 ||2.0 ||2.0 |
|Middle Eastern ||1.5 ||2.25 ||2.5 |
|Greek ||0.5 ||1.5 ||1.75 |
|Eastern European ||0.25 ||1.5 ||1.75 |
|South Asian ||0.0 ||1.25 ||1.0 |
|Hispanic ||0.25 ||0.5 ||0.5 |
|Black ||0.0 ||0.25 ||0.25 |
Full list below. Feel free to post corrections.
SCIENTISTS have identified more than 200 genes potentially associated with academic performance in schoolchildren. [. . .]So much for the fantasies of certain technorapturist HBDers that genetic engineering will erase racial differences in intelligence within a few decades.
The finding emerged from a study of more than 4000 British children to pinpoint the genes and genetic combinations that influence reasoning skills and general intelligence.
One of its main conclusions is that intelligence is controlled by a network of thousands of genes with each making just a small contribution to overall intelligence, rather than the handful of powerful genes that scientists once predicted.
Two different approaches have become widely used in the analysis of population structure: admixture-based models and principal components analysis (PCA). In admixture-based models each individual is assumed to have inherited some proportion of its ancestry from one of several distinct populations. PCA projects the individuals into a low-dimensional subspace. On the face of it, these methods seem to have little in common. Here we show how in fact both of these methods can be viewed within a single unifying framework. This viewpoint should help practitioners to better interpret and contrast the results from these methods in real data applications. It also provides a springboard to the development of novel approaches to this problem. We introduce one such novel approach, based on sparse factor analysis, which has elements in common with both admixture-based models and PCA. As we illustrate here, in some settings sparse factor analysis may provide more interpretable results than either admixture-based models or PCA.Theoretical Formulation of Principal Components Analysis to Detect and Correct for Population Stratification
The Eigenstrat method, based on principal components analysis (PCA), is commonly used both to quantify population relationships in population genetics and to correct for population stratification in genome-wide association studies. However, it can be difficult to make appropriate inference about population relationships from the principal component (PC) scatter plot. Here, to better understand the working mechanism of the Eigenstrat method, we consider its theoretical or “population” formulation. The eigen-equation for samples from an arbitrary number () of populations is reduced to that of a matrix of dimension , the elements of which are determined by the variance-covariance matrix for the random vector of the allele frequencies. Solving the reduced eigen-equation is numerically trivial and yields eigenvectors that are the axes of variation required for differentiating the populations. Using the reduced eigen-equation, we investigate the within-population fluctuations around the axes of variation on the PC scatter plot for simulated datasets. Specifically, we show that there exists an asymptotically stable pattern of the PC plot for large sample size. Our results provide theoretical guidance for interpreting the pattern of PC plot in terms of population relationships. For applications in genetic association tests, we demonstrate that, as a method of correcting for population stratification, regressing out the theoretical PCs corresponding to the axes of variation is equivalent to simply removing the population mean of allele counts and works as well as or better than the Eigenstrat method.
Population stratification leads to a predictable phenomenon-a reduction in the number of heterozygotes compared to that calculated assuming Hardy-Weinberg Equilibrium (HWE). We show that population stratification results in another phenomenon-an excess in the proportion of spouse-pairs with the same genotypes at all ancestrally informative markers, resulting in ancestrally related positive assortative mating. We use principal components analysis to show that there is evidence of population stratification within the Framingham Heart Study, and show that the first principal component correlates with a North-South European cline. We then show that the first principal component is highly correlated between spouses (r = 0.58, p = 0.0013), demonstrating that there is ancestrally related positive assortative mating among the Framingham Caucasian population. We also show that the single nucleotide polymorphisms loading most heavily on the first principal component show an excess of homozygotes within the spouses, consistent with similar ancestry-related assortative mating in the previous generation. This nonrandom mating likely affects genetic structure seen more generally in the North American population of European descent today, and decreases the rate of decay of linkage disequilibrium for ancestrally informative markers. Genet. Epidemiol. 2010.
Malaria endemicity in Southwest Iberia afforded conditions for an increase of sickle cell disease (SCD), which in the region follows a clinal pattern toward the south, where foci of high prevalence were found. SCD distribution is associated with specific geographical areas, and therefore, its introduction into Iberia may be related to the migration of different populations. We have analyzed the variation of uniparental markers in Portuguese populations with high frequency of SCD-Coruche, Pias, and Alcacer do Sal-to evaluate if their present-day pattern of neutral diversity could provide evidence about people inhabiting the area over different time periods. Two hundred and eighty-five individuals were sampled in Coruche, Pias, and Alcacer do Sal. All were analyzed for the control region of mitochondrial DNA (mtDNA); males were additionally examined for Y-chromosome markers. Results were then compared with data from other Portuguese and non-Portuguese populations. In Coruche, the genetic profile was similar to the profile usually found in Portugal. In Alcacer do Sal, the frequency of sub-Saharan mtDNA L lineages was the highest ever reported (22%) in Europe. In Pias, mtDNA diversity revealed higher frequencies of Mediterranean haplogroups I, J, and T than usually found in surrounding populations. The presence of Sub-Saharan maternal lineages in Alcacer do Sal is likely associated with the influx of African slaves between the 15th and 19th centuries, whereas in Pias, the Mediterranean influence might be traced to ancient contacts with Greeks, Phoenicians, and Carthaginians, who established important trading networks in southern Iberia. Am. J. Hum. Biol. 22:588-595, 2010.Women selling seafood in Alcácer do Sal.
Since 1869, the New York Genealogical and Biographical Society has made its name helping New Yorkers understand their roots. But the more the society pondered its future, the more the people at its helm became convinced that it needed to break with its past.The new owners: a synagogue. In a comment, the new NYGBS president insists:
Making what they called a “forward-looking decision,” the trustees hung a for-sale sign on the society’s longtime home at 122 East 58th Street several years ago. Then — to the shock of the society’s own members, who were still reeling from the sale — the trustees gave the society’s vast collection of scholarly books and historic papers to the New York Public Library.
The radical downsizing may have been as pragmatic as it was bold, but the timing could have been better.
The building was sold in 2007, and one-fourth of the $24 million that the society raised from the sale washed away as the stock market eroded. That, together with high administrative costs, led the society to make large staff reductions in early 2009, just as the new owners of its old headquarters sold them again — this time for $28.5 million.
there is no doubt whatever that the choices were carefully, thoroughly, and thoughtfully considered by dedicated trustees and by the consultants who advised them over an extended period of time.I don't doubt most of the trustees were doing what they thought was best. But I'd be curious to know the names of the consultants involved.
German woman gets to thank Portland woman in person for post-WWII CARE packages
Genetic contribution to variation in body configuration in Belgian nuclear families: a closer look at body lengths and circumferences
1000 Genomes Project: Y Chromosome SNPs (pdf)
Extended Y-chromosome investigation suggests post-Glacial migrations of modern humans into East Asia via the northern route ("evidence of geographic distribution and Y-STR diversity indicate that haplogroup Q-M242 (the ancestral haplogroup of the native American-specific haplogroup Q1a3a-M3) and R-M207 probably migrated into East Asia via the northern route")
Genetic Differences between Five European Populations ("several genes have not previously been reported as stratified within European populations, indicating that they might also have provided selective advantages: [including] most intriguingly, FOXP2, implicated in speech development.")
Evidence for archaic admixture in contemporary non-African human populations. J. Long, R. Ferrucci, S. Joyce, K. Hunley Dept of Anthropology, Univeristy of New Mexico, Albuquerque, NM.
Development of a single base extension method to resolve Y chromosome haplogroups in sub-Saharan African populations
the assays were used to screen 683 individuals from Southern Africa, including south eastern Bantu speakers (BAN), Khoe-San (KS) and South African Whites (SAW). Of the 61 haplogroups that the assays collectively resolved, 26 were found in the 683 samples. While haplogroup sharing was common between the BAN and KS, the frequencies of these haplogroups varied appreciably. Both groups showed low levels of assimilation of Eurasian haplogroups and only two individuals in the SAW clearly had Y chromosomes of African ancestry.
Facts about redheads: "Red hair is seen on the heads of only less than one percent of people.in the world. Most redheads live in the U.K., Ireland, and former colonies of U.K. like Australia.
The highest percentage of natural Redheads in the world is in Scotland (13%), followed closely by Ireland with 10%. In the US, about 2% of the population are natural redheads.
Redheads are becoming rarer and could be extinct in 100 years, according to genetic scientists."
(Photo credit. More photographs.)
I do not agree with the Nowak et al. article in every respect and will articulate some of my disagreements in subsequent posts. For the moment, I want to stress how alone you are in your statement about group selection. Your view is essentially pre-1975, a date that is notable not only for the publication of Sociobiology but also a paper by W.D. Hamilton, one of your heroes, who correctly saw the relationship between kin selection and group selection thanks to the work of George Price. Ever since, knowledgeable theoretical biologists have known that inclusive fitness theory includes the logic of multilevel selection, which means that altruism is selectively disadvantageous within kin groups and evolves only by virtue of groups with more altruists contributing more to the gene pool than groups with fewer altruists. The significance of relatedness is that it clusters the genes coding for altruistic and selfish behaviors into different groups.See earlier post for links to replies to Nowak et al. by Dawkins and others.
This blog is concerned with history, both human and natural, and race in its various senses.  Ortu Kan is an Asiatic in the second decade of his life, temporarily in the West but not of it. His people’s language is Altaic (sensu Miller 1971).Posts include: 'Were there Negritos on Taiwan?', 'Ushtettas as Tunisian "Australoids"', 'Cave-Dwelling Click Speakers in 16th-Century Mozambique'
The Anthroconservative Beacon. "A Daily Blog Dedicated to Upholding Conservative Principles Based on a Scientific Understanding of Human Nature" by "an Associate Professor in the State University of New York system."
HBD Talk. "Political Views from a Secular Humanist Perspective". Some have suggested this is Richard Hoste's new blog. I couldn't say. I skipped all the posts except the one on African blood in Arabs [Update: The person behind HBD Talk says he is not Hoste].
African signatures of recent positive selection in human FOXI1:
Conclusions: We present evidence for recent positive selection in the FOXI1 gene region in Africa. Climate might be related to this recent adaptive event in humans. Of the multiple functions of FOXI1, its role in kidney-mediated water-electrolyte homeostasis is the most obvious candidate for explaining a climate-related adaptation.Y Chromosomal Variation Tracks the Evolution of Mating Systems in Chimpanzee and Bonobo
Distinct patterns of mitochondrial genome diversity in bonobos (Pan paniscus) and humans:
Conclusions: Some variants of mitochondrially encoded subunits of the ATPase complex in humans very likely decrease the efficiency of energy conversion leading to production of extra heat.Evolution Theory as the “Consilience” Ingredient of the Humanities:
The Humanities are awash with conflicting, baseless explanations of Human Nature. Sociology, Psychology, Rational Choice theory, Religion, Marxism, Feminisim–all fail in their EXPLANATORY power when tested for consistency when they butt up against the observable actions of real human beings on the Planet. [. . .] In his article Take The Evolution Challenge, David Sloan Wilson eloquently proposes that Evolution Theory be used as a Universal Solvent for all of these competing theories, burning away the accretions of years of constructivist and ideological fat and uncovering the truth.How do we choose a mate? What scientists are learning from online dating.
Distinct genomic alterations in prostate cancers in Chinese and Western populations suggest alternative pathways of prostate carcinogenesis
How many journal articles have been published (ever)? / Twenty million papers in PubMed: a triumph or a tragedy?
Ancestral Health Symposium (August 5-6, 2011)
There's a slightly embarrassing paper out in Nature last week with E.O. Wilson on the list of authors that disparages inclusive fitness (the logic behind kin selection) and insists that (a) its explanatory power and contributions to evolutionary biology have been limited and (b) it can be ditched outright in favor of "standard natural selection theory". What is meant by this last phrase is not entirely clear, but what is clear is that the authors do not understand inclusive fitness and have completely overlooked the many ways in which it has illuminated us (sex ratio adjustment as the prime example). The authors have a section titled "Rise and fall of inclusive fitness theory", which is curious unless they are writing alt history fiction.John Hawks agrees:
I am only going to comment briefly on the paper, because Jerry Coyne and Richard Dawkins have already chewed it up.
The weird part of the paper is the way it describes inclusive fitness as some kind of theoretical afterthought, useful only as an ad hoc explanation for eusocial insects. It contrasts the inclusive fitness concept with "standard natural selection" as if it were possible for organisms to erase the fact that they're related to each other! And the authors imply that they have fatally damaged the concept of kin selection.
It's so contrary to evolutionary theory, that I thought maybe I was missing something. But I've been spending time on another problem this week and haven't had time to follow it up.