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Geldhauser, F. (1990). Versuche zum Entkleben von Schleieneiern (Vol. 37).
Schlüsselwörter: Fischerei, Tinca, Zucht , Methode
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Geitner, V., & Drewes, U. (1990). Entwicklung eines neuartigen Pfahlfischpasses.
Schlüsselwörter: Fisch, Fischaufstiegshilfe
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Gebhardt, H. (1990). Stechmückenbekämpfung mit Fischen. Heidelberg: Ruprecht-Karls-Universität.
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Gebhardt, H. (1990). Die Bedeutung des Inundationsgebietes des Rheins als Laichgebiet für Fische (Vol. 1).
Schlüsselwörter: Fisch, Fortpflanzung, Rhein
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Gamperl, R. (1990). Vorkommen und Verbreitung von Flußkrebsen (Astacidae) in den Gewässern der Steiermark. Graz: Univerität.
Schlüsselwörter: Krebs, Verbreitung, Vorkommen, Kartierung, Österreich
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Frank, C., Jungbluth, J. H., & Richnovszky, A. (1990). Die Mollusken der Donau vom Schwarzwald bis zum Schwarzen Meer. Budapest.
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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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Finkelstein, R. (1990). Datenbanken netzversetzt.
Schlüsselwörter: Datenbank, dokumentation
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Feustel, C. (1990). Der Einsatz von Grund- und Quellwasser in der Forellenteichwirtschaft, unter besonderer Berücksichtigung des Gasgehaltes. München: Technische Universität.
Schlüsselwörter: Fisch, Bachforelle, Salmo trutta, Zucht
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Eriksdotter, H. (1990). Von Format zu Format – Teil 4 – PCX, GIF.
Schlüsselwörter: Grafik, formate, theorie, methode, dokumentation
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