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Akamine, T. (1993). A new standard formula for seasonal growth of fish in population dynamics (Vol. 59).
Zusammenfassung: This formula is based on the Richards formula, which includes well-known growth formulae, and is invariant for allometry. It is expanded by exchanging the independent variable from time to its function, in other words the cumulative water temperature. This standard formula includes the method of substituting values for the cumulative water temperature into the time term, the mathematical model of adding sine functions to the time term, and switched growth rate models. This standard model is given by general theory, which makes the character of parameters clear and helps to analyze the growth formula statistically.
Schlüsselwörter: Fisch, wachstum, statistik, modell, population, theorie
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Bartels, H. (1993). Alters- und Wachstumsuntersuchungen an Fischen aus dem Schapenbruchteich, Naturschutzgebiet Riddagshausen. Braunschweig: Carolo-Wilhelmina-Universität.
Schlüsselwörter: Fisch, Altersbestimmung, Wachstum, Alter
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Juell, J. E., & Westerberg, H. (1993). An ultrasonic telemetric system for automatic positioning of individual fish used to track Atlantic salmon (Salmo salar L.) in a sea cage (Vol. 12).
Zusammenfassung: A telemetric system for automatic positioning of individual fish in the vertical or horizontal plane is described. The position of a transmitter in a fish is computed from the difference in arrival time of the ultrasonic signal to a fixed array of hydrophones. Sources of error in positioning are discussed. In a preliminary study, the resolution of the system in time and space was adequate to monitor the behaviour of adult salmon in a sea cage. At moderate stocking density the salmon was swimming continually in counter-clockwise circles and diel rhythms in swimming speed, depth and path-radius were observed. With only 30 fish in the cage this stereotype behaviour broke down. Few or no visits into the feeding area during some feedings indicated a variable feeding motivation.
Schlüsselwörter: telemetrie, fische, methode, technik
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Gein, W. A. v., & Gillissen, I. (1993). Area computation of polygons (Vol. 70).
Zusammenfassung: Area computation has always been an important task for land surveyors. Until recently the hydrographic surveyor could utilize approximative methods, as results up to 0.1 km super(2) were sufficient for many purposes. Investigations resulted in computation algorithms, usable on the ellipsoid, with accuracies of the square metre magnitude.
Schlüsselwörter: hydrographic-surveying; boundaries-
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Schmiedel, J. (1993). Auswirkungen von künstlichen Lichtquellen auf die wildlebende Tierwelt. Hannover: Universität Hannover, Institut für Landschaftspflege und Naturschutz (Selbstverlag).
Schlüsselwörter: Fisch, Schädigung, Umweltverschmutzung
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Jungbluth, J. H. (1993). Beiträge zur Najadenfauna in Mitteleuropa (Vol. 122).
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Käfel, G. (1993). Besonderheiten und Gefährdung von Misgurnus fossilis (Vol. 46).
Schlüsselwörter: Fisch, Misgurnus, Gefährdung
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Wagner, B., Löffler, H., Kindle, T., Klein, M., & Staub, E. (1993). Bodenseefischerei. Sigmaringen: Jan Thorbecke Verlag.
Schlüsselwörter: Fisch, Gesamtwerk
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Hieronimus, H. (1993). Das wissenschaftlich richtige Zitieren von Fischnamen (Vol. 2).
Schlüsselwörter: Fisch, Systematik, Nomenklatur
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Riehl, R., Patzner, R., & Glechner, R. (1993). Die Eier heimischer Fische: 2. Seelaube – Chalcalburnus chalcoides mento (Agassiz, 1832) (Vol. 46).
Schlüsselwörter: Fisch, Ei, Seelaube, Mairenke, Chalcalburnus chalcoides mento, Fortpflanzung
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