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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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Francis, R. I. C. C. (1990). Back-calculation of fish length: A critical review (Vol. 36).
Zusammenfassung: A review is made of the literature on the back-calculation of fish body length from marks on scales or other hard parts (otoliths, vertebrae, fin rays, etc.). Though the technique is widely used it does not appear to be well understood. Regression methods are commonly used, apparently in ignorance of the more realistic proportional methods. It is not generally recognized that there are two equally plausible back-calculation hypotheses which can lead to significantly different back-calculated lengths. The Fraser-Lee equation, the most commonly used back-calculated formula, follows neither of these hypotheses but is based on a misuse of linear regression. It is recommended that back-calculation be restricted to procedures following one of the proportional hypotheses; that the difference between lengths calculated using the two hypotheses is a useful measure of the minimum uncertainty in back-calculation lengths; and that more attention be paid to validating back-calculation hypotheses by comparing observed and back-calculated lengths for individual fish. The pattern of heteroscedasticity in body length-scale radius plots is noted as a useful diagnostic in evaluating back-calculation hypothesis.
Schlüsselwörter: Fisch, Statistik, Regression, Längen..., Review, Wachstum
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Deufel, J. (1957). Bekämpfung der Verpilzung von Fischeiern mit Malachitgrün (Vol. 1957).
Schlüsselwörter: Fisch, Krankheit, Ei, Verpilzung, Medikament
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Lehmann, J., Stürenberg, F. - J., Mock, D., & Feldhaus, A. (2005). Untersuchungen auf virale Infektionen bei Aalen in Nordrhein-Westfalen (Vol. 56).
Schlüsselwörter: Fisch, Aal, Anguilla anguilla, Parasit, Krankheit
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Paul, J., Seyfried, R., & Klupp, R. (2005). Über die Population der Mühlkoppe in der Aufseß (Vol. 56).
Schlüsselwörter: Fisch, Groppe, Cottus gobio, Vorkommen
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Götz, C. (2005). Wie aussagekräftig sind Elektrobefischungen in größeren Fließgewässern? (Vol. 56).
Schlüsselwörter: Fischerei, Methode, Elektrofischerei
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Rümmler, F., Schiewe, S., & Ebel, H. (2005). Die Fangeffektivität des Elektrofischfangs in Gelegezonen von Seen (Vol. 56).
Schlüsselwörter: Fisch, Fischerei, Elektrofischerei, Methode, See
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Gottschalk, T., & leig, R. (2000). Eine einfache Methode zur Erbrütung von Schleien.
Schlüsselwörter: Fisch, Schleie, Fortpflanzung, Tinca tinca
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Lühmann, M., & Mann, H. (1961). Untersuchung über den Aalfang in der Elbe.
Schlüsselwörter: Fisch, Aal, Anguilla anguilla, Fischerei, Ertrag, Elbe
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