sandygautam: Minimum Desirable Product http://j.mp/7436Fc Rings true for consumer centered internet startups
EvoMRI: Got my first notification. Thanks, Jean-Claude. re: http://ff.im/cs7Gf
EvoMRI: Liked "Using Wikipedia « A GFU Librarian's Blog" http://ff.im/cAduN
RT @mariapage: "Mathematical model of simple circuit in chicken brain raises fundamental questions about neural circuitry" ( http://bit. ...Tue, 08/12/2009 - 12:16pm | by sandygautam
"Therefore, let us use online comments also for highlighting good parts of papers, not only for pointing out what we... http://ff.im/cBpdqTue, 08/12/2009 - 12:09pm | by daniel
EvoMRI: "Therefore, let us use online comments also for highlighting good parts of papers, not only for pointing out what we... http://ff.im/cBpdq
Liked "RT @NiemanLab: "Redesign" doesn't always mean "overhaul." Here's an interesting look at Wikipedia's subtle..." http://ff.im/cBnUCTue, 08/12/2009 - 12:00pm | by daniel
Upon feedback from Graham, I took the RW reference out. Still think some mention of Open Source would be good.... re: http://ff.im/beKZBTue, 08/12/2009 - 11:40am | by daniel
EvoMRI: Upon feedback from Graham, I took the RW reference out. Still think some mention of Open Source would be good.... re: http://ff.im/beKZB
Prof. Pradoshnath from NISTADS was at CIS, Bangalore on Nov 25th, 2009 and gave a presentation on ICT, transaction cost and development: The flip side. His bio and the abstract of the talk are given in this blog.
See original: ICT, transaction cost and development: The flip side
An epic battle between hundreds of Hamadryas baboons is caught on camera by a BBC natural history film crew.
See original: When two baboon troops go to war
Well, I don't quite know about that, but that's the sort of take-away from a new paper in PLoS Biology which looks at the downsides of female attractiveness. A Cost of Sexual Attractiveness to High-Fitness Females:
Adaptive mate choice by females is an important component of sexual selection in many species. The evolutionary consequences of male mate preferences, however, have received relatively little study, especially in the context of sexual conflict, where males often harm their mates. Here, we describe a new and counterintuitive cost of sexual selection in species with both male mate preference and sexual conflict via antagonistic male persistence: male mate choice for high-fecundity females leads to a diminished rate of adaptive evolution by reducing the advantage to females of expressing beneficial genetic variation. We then use a Drosophila melanogaster model system to experimentally test the key prediction of this theoretical cost: that antagonistic male persistence is directed toward, and harms, intrinsically higher-fitness females more than it does intrinsically lower-fitness females. This asymmetry in male persistence causes the tails of the population's fitness distribution to regress towards the mean, thereby reducing the efficacy of natural selection. We conclude that adaptive male mate choice can lead to an important, yet unappreciated, cost of sex and sexual selection.
The dynamic is well illustrated by the first figure:
The two lines above the shaded distribution illustrate variant male preference strategies. The solid lines shows random preference for females as a function of size, while the dashed line shows biased preference toward larger fitter females. The two lines below show the distribution of female fitness in response. In the case of the solid line you see the fitness of females in the context of random preferences; that is, males do not strongly prefer females who are fecund because of their large size. The reason that a large female may be more fecund is rather obvious, more physiological resources expendable upon the offspring. The evolutionary anthropologist Sarah Blaffer Hrdy claims the same principle is operative among humans in her book Mother Nature, larger females are less likely to miscarry and have complications, and can provide more robustly for their young. If one is healthy enough to construct a large and robust physique, one normally does so.
And yet as you can see above, strong male preference for these fecund females reduces their fitness. Male persistence from what I can tell might be colloquially termed "harassment." The energetic surfeit which larger females might allocate to their own reproductive output for provisioning has to be expended upon fending off males. In a context where males strongly prefer large females their fitness advantage is actually mitigated! This is a really weird outcome of sexual preferences.
The model rests on four primary assumptions:
Also check out the featured ScienceBlog of the week: Neurotopia
See original: The downside of beauty [Gene Expression]
Liked "PhD Dissertation analysing PLoS ONE Comments and Notes (vs Science) from the perspective of rhetoric:..." http://ff.im/cAbdoTue, 08/12/2009 - 11:28am | by daniel
EvoMRI: Liked "PhD Dissertation analysing PLoS ONE Comments and Notes (vs Science) from the perspective of rhetoric:..." http://ff.im/cAbdo
EvoMRI: Journal of Happiness Studies - made my day. http://ff.im/cBjV0
8/12/2009 Gatwick would still operate with just one runway.Heavy taxes on passengers and a ban on expansion at regional airports will be needed to curb Britain’s insatiable appetite for air travel, a climate change report will say today . But it will still be possible to build a third runway at Heathrow, add second runways [...]