New PDF release: An Introduction to Mathematical Population Dynamics: Along

By Mimmo Iannelli, Andrea Pugliese

ISBN-10: 3319030264

ISBN-13: 9783319030265

This publication is an creation to mathematical biology for college students without adventure in biology, yet who've a few mathematical history. The paintings is concentrated on inhabitants dynamics and ecology, following a practice that is going again to Lotka and Volterra, and encompasses a half dedicated to the unfold of infectious illnesses, a box the place mathematical modeling is intensely well known. those subject matters are used because the quarter the place to appreciate forms of mathematical modeling and the prospective which means of qualitative contract of modeling with information. The booklet additionally features a collections of difficulties designed to procedure extra complex questions. This fabric has been utilized in the classes on the college of Trento, directed at scholars of their fourth 12 months of stories in arithmetic. it could even be used as a reference because it offers up to date advancements in different components.

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Extra resources for An Introduction to Mathematical Population Dynamics: Along the trail of Volterra and Lotka (UNITEXT, Volume 79)

Sample text

Concerning the dynamics, we consider in this section an idealized situation that, when age structure is disregarded, corresponds to Malthus model. Thus we consider a single population living isolated, in an invariant habitat, all of its individuals being perfectly equal but for their age. In accordance with this phenomenological setting, fertility and mortality are intrinsic parameters of the population and do not depend on time, nor on the population size: they are functions of age only. Thus we introduce: • β (a): age-specific fertility, the mean number of newborns per unit time, borne by each individual whose age is in the infinitesimal age interval [a, a + da], at time t; • μ (a): age-specific mortality, the death rate of individuals having age in [a, a+ da] at time t.

17b shows the shape of the growth rate of the dimensionless eq. 35) r(u) = ρ 1 − u(t) u(t) − , q 1 + u2 (t) changing as ρ crosses ρ1 and ρ2 . We note that the bifurcation curve in Fig. 17a, implicitly defined through eq. 36), can be made explicit with respect to ρ as a function of the size u∗ of the steady state, obtaining q u∗ . ρ (u∗ ) = 1 + u∗ 2 (q − u∗ ) (a) (b) Fig. 34). 9 The spruce-budworm system (a) 29 (b) Fig. 36 in three different cases (a), (b) and (c) respectively corresponding to ρ < ρ1 , ρ ∈ (ρ1 , ρ2 ) and ρ > ρ2 From the same Fig.

Let assume that the government taxes at a percentage θ the gains obtained by fisheries. How does this affect the results obtained with open-access fishery? 4. Consider again open-access fishery and assume that the government taxes according to how much has been fished Y . Let us consider two separate cases: a constant fraction θ Y , or a progressive tax τ (Y ) given by the formula τ (Y ) = 0 if Y ≤ Y0 θ (Y −Y0 ) if Y > Y0 Which are the results of these regulations? References 1. : Animal Aggregations, The University of Chicago, Chicago press (1931) 2.

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An Introduction to Mathematical Population Dynamics: Along the trail of Volterra and Lotka (UNITEXT, Volume 79) by Mimmo Iannelli, Andrea Pugliese


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