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@Remi.b is correct that you haven't given us very much information, but I think we can reconstruct what's going on. Suppose the population growth rate is written out as $$ \frac{dN}{dt} = N ( b - \delta - \gamma N) $$ then the equilibrium (carrying capacity) occurs when $N>0$ and $dN/dt=0$, i.e. $b - \delta - \gamma K = 0$. Solving this for $K$ gives $(...


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I'm sympathetic to @Dirigible that this seems like the kind of thing that should be easy to research, but I was surprised to see that there's not an answer to this already on SE.Biology. So very quickly: Yes, there is what is known as an "allometry" relationship between body size and abundance in which the two tend to be inversely related. Here is one meta-...


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