Blanke, D. (1998). Flußkrebse in Niedersachsen (Vol. 98).
Schlüsselwörter: Krebs, Verbreitung, Geologisch
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Chen, Y., Jackson, D. A., & Harvey, H. H. (1992). A comparison of von Bertalanffy and polynomial functions in modelling fish growth data (Vol. 49).
Zusammenfassung: We compared the von Bertalanffy growth function (VBGF) and five polynormial functions (PF) in modelling fish growth for 16 populations comprising six species of freshwater fishes. Ranked results of the variance explained by each growth function indicated that VBGF described growth data better than three- and four-parameter polynomial functions. Log-transforming length and age greatly improved the goodness-of-fit of the three-parameter polynomial function. Statistical comparison of growth between populations or sexes was done using a general linear model for polynomial functions. The VBGF proved to be the best growth model for all 16 populations.
Schlüsselwörter: Fischerei, wachstum, methode, theorie, modell, statistik
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Eckmann, R., Gaedke, U., & Wetzlar, H. J. (1988). Effects of Climatic and Density-Dependent Factors on Year-Class Strength of Coregonus lavaretus in Lake Constance (Vol. 45).
Zusammenfassung: The influences of density-dependent and density-independent factors on year-class strength (YCS) of Corogonus lavaretus in Lake Constance were studied by multiple linear regression analyses for the period from 1962 to 1982. Meteorological conditions that lead to early thermal stratification of the lake in April are of prime importance for YCS and account for 41% of the total YCS variance. Zooplankton concentration during spring has no significant influence on YCS. The extensive stocking program on the lake (50-200 million larvae stocked per year) significantly supports YCS, but this relationship becomes apparent only after the influence of meteorological conditions are removed from the data.
Schlüsselwörter: Fischerei, zeitreihe, modell, statistik
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Hagen, D. W., Moodie, G. E. E., & Moodie, P. F. (1980). Polymorphism for breeding Colors in Gasterosteus aculeatus – Reproductive success as a Result of Convergence for Threat Display (Vol. 34).
Schlüsselwörter: fische, verhalten, population, genetik, morphologie
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Losso, P., & Sternberg, U. (1995). Ein besonderer Dreh – Drehung im Raum – eine elegante Variante.
Schlüsselwörter: 3d, algorithmus, methode, mathematik, pascal, listing
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Hüskes, R. (1995). Tool-Almanach – VBX- und OCX-Module im Überblick.
Schlüsselwörter: vbx, vergleich, ocx, delphi, c++, software
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Schmitt, H. - J. (1995). Buchprüfung der Datenbankiers – Der Stand der Dinge bei PC-SQL-Servern.
Schlüsselwörter: SQL, Vergleich, Software, Datenbank
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(1995). Wie Email sich bewegt.
Schlüsselwörter: Grundlage, e-mail, internet
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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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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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