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2012 | 32 | 1-2 | 35-45
Tytuł artykułu

Von Bertalanffy's growth dynamics with strong Allee effect

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EN
Abstrakty
EN
Von Bertalanffy's model is one of the most popular differential equation used in order to study the increase in average length or weight of fish. However, this model does not include demographic Allee effect. This phenomenon is known in the fisheries literature as "depensation", which arises when populations decline rapidly at low densities. In this paper we develop and investigate new corrected von Bertalanffy's models with Allee effects. The generalization that we propose results from considering correction factors, one of rational type and the others of polynomial type, where two parameters are considered. The use of a parameter C > 0 leads the presented generalization, which yields some more flexible models with variable extinction rates. An Allee limit or unstable equilibrium $E^u$ is incorporated so that the models under study have strong Allee effect. We analyze and show the transition from the strong Allee effect to the inexistence of this effect, through by a "weakening" of the Allee effect, depending on the parameters C and $E^u$. Finally, we discuss the flexibility of corrected von Bertalanffy's sigmoid growth curves. So, the correspondents inflexion points are variable, i.e., the fish mass when the growth rate is maximum may be varied.
Twórcy
  • Instituto Superior de Engenharia de Lisboa - ISEL, ADM and CEAUL, Rua Conselheiro Emídio Navarro, 1, 1959-007 Lisboa, Portugal
  • Instituto Superior de Engenharia de Lisboa - ISEL, ADM and CEAUL, Rua Conselheiro Emídio Navarro, 1, 1959-007 Lisboa, Portugal
Bibliografia
  • [1] S.M. Aleixo, J.L. Rocha and D.D. Pestana , Populational growth models proportional to beta densities with Allee effect , Am. Inst. Phys. (1124) 2009 3-12
  • [2] S.M. Aleixo and J.L. Rocha, Generalized models from Beta(p,2) densities with strong Allee effect: dynamical approach , J. Comput. Inf. Technol 3 (2012) 201-207
  • [3] W.C. Allee, Animal aggregations (University of Chicago Press, Chicago, 1931)
  • [4] D.S. Boukal and L. Berec, Single-species models of the Allee effect: extinction boundaries, sex ratios and mate encounters , J. Theor. Biol. 218 (2002) 375-394. doi: 10.1006/jtbi.2002.3084
  • [5] C.E. Brassil, Mean time to extinction of a metapopulation with an Allee effect, Ecol. Model. 143 (2001) 9-16. doi: 10.1016/S0304-3800(01)00351-9
  • [6] G.M. Cailliet, W.D. Smith, H.F. Mollet and K.J. Goldman, Age and growth studies of chondrichthyan fishes: the need for consistency in terminology, verification, validation and growth function fitting, Environ. Biol. Fish. 77 (2006) 211-228. doi: 10.1007/s10641-006-9105-5
  • [7] A.B. Cooper, A guide to fisheries stock assessment. From data to recommendations (New Hampshire Sea Grant, 2006)
  • [8] T.E. Essington, J.F. Kitchell and C.J. Walters , The von Bertalanffy growth function, bioenergetics and the consumption rates of fish, Can. J. Fish. Aquat. Sci. 58 (2001) 2129-2138. doi: 10.1139/f01-151
  • [9] J.A. Hutchings and J.D. Reynolds, Marine fish population collapses: consequences for recovery and extinction risk, BioSci. 54 (2004) 297-309. doi: 10.1641/0006-3568(2004)054[0297:MFPCCF]2.0.CO;2
  • [10] A.M. Kramer, B. Dennis, A.M. Liebhold and J.M. Drake, The evidence for Allee effects, Popul. Ecol. 51 (2009) 341-354. doi: 10.1007/s10144-009-0152-6
  • [11] J.A. Musick, Criteria to define extinction risk in marine fishes, Fisheries 24 (1999) 6-14. doi: 10.1577/1548-8446(1999)024<0006:CTDERI>2.0.CO;2
  • [12] H.T. Odum and W.C. Allee, A note on the stable point of populations showing both intraspecific cooperation and disoperation , Ecology 35 (1954) 95-97. doi: 10.2307/1931412
  • [13] J.L. Rocha and S.M. Aleixo, Modeling Allee effect from Beta(p,2) densities, Proc. ITI 2012, 34th Int. Conf. Information Technology Interfaces (2012) 461-466
  • [14] S.J. Schreiber, Allee effects, extinctions and chaotic transients in simple population models, Theor. Popul. Biol. 64 (2003) 201-209. doi: 10.1016/S0040-5809(03)00072-8
  • [15] A. Tsoularis, Analysis of logistic growth models , Res. Lett. Inf. Math. Sci. 2 (2001) 23-46
  • [16] M. Wang and M. Kot, Speeds of invasion in a model with strong or weak Allee effects, Math. Biosci. 171 (2001) 83-97. doi: 10.1016/S0025-5564(01)00048-7
  • [17] L. Von Bertalanffy, A quantitative theory of organic growth, Human Biology 10 (1938) 181-213
  • [18] L. Von Bertalanffy, Quantitative laws in metabolism and growth, The Quarterly Review of Biology 32 (1957) 217-231. doi: 10.1086/401873
Typ dokumentu
Bibliografia
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Identyfikator YADDA
bwmeta1.element.bwnjournal-article-doi-10_7151_dmps_1142
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