[OBRA COMPLETA] Análisis Ergódico de Sostenibilidad Biológica para poblaciones de peces : estructura de edades.

The study is part of an approach to ecosystem changes with impact on populations, multiple equilibria states, possible irreversibility of population status and great uncertainty. Biological processes are formalized and are studied conditions for biological sustainability. The biological sustainability of an age-structured population requires both to achieve stability in the age structure and abundance. Minimum conditions for the existence of a stable age structure and convergence are established, regardless of the initial state, the population structure towards it. The recruitment function is generally possibly nonlinear and unknown. The age specific survival probabilities are assumed constant. Is formulated the called "Problem of Extreme Equilibrium" (PEE), in which is searched the minimum of the maximum age specific survival probabilities, such that in the best reproductive / environmental condition, the population persists. The existence and uniqueness of a solution is proved for this problem. There is a maximum skewed toward juveniles of the stable age structure, for biological sustainability. This result is consistent with the reproductive biology of many species of fish. Then there are obtained some ergodic biological sustainability indicators and its limits. Criteria for rejectionacceptance a survival probability vector as biologically sustainable, is formulated. An application to the Argentina hake (Merluccius hubbsi) takes place south of 41°S of the results obtained in this work. The effect of the predetermination of the instantaneous natural mortality rates over estimations of the population dynamics is studied. The notion of anchor point, which favors the uniqueness in estimating survival probabilities and abundances, is defined. The Simplified Sequential Model (MSSIM) is defined. These agestructured model is free use of instantaneous mortality rates both natural and fishing. A practical application of the results obtained to the Argentina hake (Merluccius hubbsi) stock south of 41°S, was performed. The feasibility of a fishery management under constant age specific survival probabilities, is studied. The maximum yield per recruit obtained from the Thompson and Bell proposed using a general catch equation, and a maximum is defined using ergodic biological indicators of sustainability. Maximum sustainable yield is calculated in this context, for the functions of recruitment Beverton and Holt, Ricker, and linear.

Bibliographic Details

Main Author:	Aubone, A.
Format:	Book/Monograph/Conference Proceedings biblioteca
Language:	Spanish / Castilian
Published:	el autor 2015
Subjects:	Merlucciidae, Merluccius hubbsi, Merluza, Recursos pesqueros, Evaluación de efectivos, Estructura poblacional, Dinámica poblacional, Composición por edad, Pesca sustentable, Modelos matemáticos, Fishery resources, Stock assessment, Population structure, Population dynamics, Age composition, Sustainable fishing, Mathematical models,
Online Access:	http://hdl.handle.net/1834/6885
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