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This article starts by reviewing the differences between various measures of fitness, for example, individual fitness, absolute fitness, relative fitness and geometric mean fitness.
- Nature Reviews Genetics Series on Modelling
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- Nature Reviews Genetics Series on Modelling
2 wrz 2011 · The geometric mean of relative abundance indices, G, is increasingly being used to examine trends in biological diversity and to assess whether biodiversity targets are being met. Here, we explore the mathematical and statistical properties of G that make it useful for judging temporal change in biological diversity, and we discuss its ...
10 paź 2007 · Because the geometric mean is G≈μ−σ 2 /(2 μ), where μ is the (arithmetic) mean and σ 2 is the variance in absolute fitness, the allele favored by natural selection is the one that best boosts μ while reducing σ 2.
1 gru 2007 · Because the geometric mean is G ≈μ−σ 2 / (2 μ), where μ is the (arithmetic) mean and σ 2 is the variance in absolute fitness, the allele favored by natural selection is the one that best boosts μ while reducing σ 2.
The term (b – d) is so important in population biology that it is given its own symbol, R. Thus R = b – d, and is called the geometric rate of increase. Substituting R for (b – d) gives us. To further define R, we can calculate the rate of change in population size, D Nt, by subtracting.
Biological structures run the gamut in sizes from the nanometer scale of the individual macromolecules of life all the way up to the gigantic cyanobacterial blooms in the ocean that can be seen from satellites.
When an organ grows at the same rate as the rest of the body, α = 1, a condition called isometry. Such an organ maintains a constant proportionate size (but not absolute size) throughout...
