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For the logistic equation, $$\frac{\mathrm{d}N(t)}{\mathrm{d}t} = rN(t)\left(\frac{K - N(t)}{K}\right)$$ the solution that allows you to calculate population population size at any time is: $$N(t) = \frac{N(0)Ke^{rt}}{K - N(0) + N(0)e^{rt}}.$$ Looking at this equation algebraically with a set of knowns—$K$, $t$, and $N(t)$—and a set of unknowns—$r$ and $N(0)$...


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The density of Macrocystis pyrifera is pretty variable. According to Dayton et al. 1984 off of the Southern California coast it can range from less than 0.1 to to 1.0 $individuals/m^2$. The variation depends on the location, where there are different exposure levels to high energy waves, upwellings containing nutrients, and predation by sea urchin. Dayton, P....


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Minimum number of individuals needed to start a population But could just one woman be the progenitor of a healthy nation? And, if not, what is the minimum number of distantly-related individuals required? Healthy is a pretty subjective term, and it's perhaps easier to think of things in terms of a minimum viable population, which is more about straight ...


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Short answer: yes, people have formulated ways to estimate $F_{ST}$ for multiallelic loci, e.g. microsatellites. For a review, see here. Specifically, Nei could define $F_{ST}$ for multiple alleles as $F_{ST} = \frac{(H_t - H_s)}{H_t}$, which is to say the proportion of total heterozygosity that is across rather than within populations. This is agnostic to ...


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It depends on whether mutation exists. Generally mutation is happening in biology, but in its absence, yes it will be at or near zero: Note that in the absence of any mutation, $F_{ST}$ would be defined but equal to 0, as all the genetic variance is within individuals and none between individuals and subpopulations. From that paper, see this figure: So, ...


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Based on the IUCN Criteria for endangered status there are two broad categories of models to help in determining endangered status. Note that no one methodology is used to determine the status of any species. Rather, a panel of experts consider all available evidence (including numerous modelling studies) and essentially make a determination based on their ...


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