negative frequency dependent selection

Many species make use of behavioral strategies to deter predators. In the example of male side-blotched lizards populations of each color pattern increase or decrease at various stages.

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This is similar to a phenomenon in evolutionary biology called negative frequency-dependent selection.

. Negative frequency -dependent selection selects for rare phenotypes in a population and increases a populations genetic variance. In simple terms the value of heavy metal is high because of its relatively low frequency in the whole population. This creates a mechanism for negative frequency-dependent selection apostatic selection. A recent model has proposed that sleep loss prevents the normal overnight lowering and thus restoration of central adrenergic signalling that normally occurs during rapid eye movement REM sleep leading to heightened noradrenergic tone and thereby an over-generalized responsivity within select affective salience networks 84.

Positive frequency-dependent selection selects for common phenotypes in a population and decreases genetic variance. A Mediterranean mantis Iris oratoria attempting to startle a predator with deimatic behaviour. That is heavy metal fans are a minority and heavy metal music is more valuable because it is rare as opposed to pop music which is by definition popular.

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