Posts Tagged ‘balancing’

Why Are Free Speech and Diversity Seen as Campus Enemies?

The news that students at City, University of London have voted to ban The Sun, Daily Mail and Express newspapers from its campus – a ban which could be extended to other media organisations – is just the latest example of how free speech is under threat at universities across the globe. The university’s student […]

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Effects of foraging distance on macronutrient balancing and performance in the German cockroach, Blattella germanica [RESEARCH ARTICLE]

Alexander E. Ko, Kim Jensen, Coby Schal, and Jules SilvermanThe German cockroach (Blattella germanica L.) is an excellent model omnivore for studying the effect of foraging effort on nutrient balancing behavior and physiology, and its consequences for…

Balancing selection shapes density-dependent foraging behaviour

The optimal foraging strategy in a given environment depends on the number of competing individuals and their behavioural strategies. Little is known about the genes and neural circuits that integrate social information into foraging decisions. Here we show that ascaroside pheromones, small glycolipids that signal population density, suppress exploratory foraging in Caenorhabditis elegans, and that heritable variation in this behaviour generates alternative foraging strategies. We find that natural C. elegans isolates differ in their sensitivity to the potent ascaroside icas#9 (IC-asc-C5). A quantitative trait locus (QTL) regulating icas#9 sensitivity includes srx-43, a G-protein-coupled icas#9 receptor that acts in the ASI class of sensory neurons to suppress exploration. Two ancient haplotypes associated with this QTL confer competitive growth advantages that depend on ascaroside secretion, its detection by srx-43 and the distribution of food. These results suggest that balancing selection at the srx-43 locus generates alternative density-dependent behaviours, fulfilling a prediction of foraging game theory.

Women, Crime, and Justice: Balancing the Scales

  Women, Crime, and Justice: Balancing the Scales presents a comprehensive analysis of the role of women in the criminal justice system, providing important new insight to their position as offenders, victims, and practitioners. Read More….

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