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Myers, R. A., & Cadigan, N. G. (1995). Statistical analysis of catch-at-age data with correlated errors (Vol. 52).
Zusammenfassung: The statistical model used is extended to estimate abundance from commercial catch-at-age data for many of the major commercial fish species in the world. The model combines commercial catch-at-age data and research survey estimates of fish abundance; extends the model to allow correlated errors among ages within a year for the survey estimates of fish abundance. Method is formulated for modeling the fishing mortality on the oldest ages of the fish caught. Estimates are obtained using maximum likelihood. The level of correlation among ages is sufficiently large to produce large biases in the standard methods for some stocks. The statistical model that includes correlated errors greatly reduces bias and increases efficiency if the correlation in the estimation error is large.
Schlüsselwörter: Fisch, Fischerei, Statistik, Wachstum, Mortalität, VPA, Population, Mathematik, Modell
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Wang, Y. G., & Thomas, M. R. (1995). Accounting for individual variability in the von Bertalanffy growth model (Vol. 52).
Zusammenfassung: Estimation of von Bertalanffy growth parameters has received considerable attention in fisheries research. Since Sainsbury much of this research effort has centered on accounting for individual variability in the growth parameters. In this paper we demonstrate that, in analysis of tagging data, Sainsbury's method and its derivatives do not, in general, satisfactorily account for individual variability in growth, leading to inconsistent parameter estimates (the bias does not tend to zero as sample size increases to infinity). The bias arises because these methods do not use appropriate conditional expectations as a basis for estimation.
Schlüsselwörter: Fisch, Statistik, Methode, Vergleich, Wachstum, Bertalanffy, Faben
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Paller, M. H. (1995). Interreplicate Variance and Statistical Power of Electrofishing Data from Low-Gradient Streams in the Southeastern United States (Vol. 15).
Schlüsselwörter: fischerei, statistik, CPUE, methode, elektrofischerei, modell
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Paller, M. H. (1995). Relationships among Number of Fisch Species Sampled, Reach Length Surveyed, and Sampling Effort in South Carolina Coastal Plain Streams (Vol. 15).
Schlüsselwörter: fischerei, Statistik, population, artenzusammensetzung, methode, modell, vergleich, elektrofischerei
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Raymond, M., & Rousset, F. (1995). An exact test for population Differentiation (Vol. 49).
Schlüsselwörter: population, Modell, mathematik, algorithmus, artendifferenzierung, Statistik
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Apfelböck, H. (1995). Schneller mit 32 bit.
Schlüsselwörter: Windows, Tips, Grundlagen
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-db. (1995). Alles Wichtige über das Internet.
Schlüsselwörter: Internet, Grundlagen
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-db. (1995). Alles Wichtige über Gateways.
Schlüsselwörter: x.400, dfü, Netzwerk, Grundlagen
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Schmidt, S. (1995). Das andere Excel: Experimente im Spreadsheet.
Schlüsselwörter: Excel, Tips, Mathematik
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Gilmour, A. R., Thompson, R., & Cullis, B. R. (1995). Average Information REML: An Efficient Algorithm for Variance Parameter Estimation in Linear Mixed Models (Vol. 51).
Schlüsselwörter: maximum-likeli, statistik, modell, zeitreihe, mathematik
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