Winkler, C. (1995). Untersuchungen zur Biologie und Ökologie des Strömers (Leuciscus souffia agassizi Val.) in nördlichen Bodenseezuflüssen. Ulm: Universität Ulm.
Schlüsselwörter: Fisch, Leuciscus souffia agassizi, Nahrung, Wachstum, Alter
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Hahn, S. (1995). Untersuchungen zur Besiedelung von Fischteichen mit submersen Makrophyten in der Oberlausitz. Rostock: Universität Rostock.
Schlüsselwörter: Wasserpflanzen, Fischteich
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Porch, C. E. (1995). Trajectory-based approaches to estimating velocity and diffusion from tagging data (Vol. 93).
Zusammenfassung: Several new models are developed to estimate the velocity and diffusion of a population from tagging data. The new estimators apply the inverse principle to the individual trajectories of recovered tags rather than to their local abundance. These models require fewer assumptions and less information than do published abundance-based methods. Techniques are presented for a variety of circumstances, and both discrete and continuous parameterizations of the velocity field are included. The sensitivity of the estimators to violations of the assumptions was examined numerically by using stochastic simulations. The results suggest that the estimators are fairly robust but may fail under certain conditions. Extensions to accommodate these situations are discussed.
Schlüsselwörter: dispersion-; migrations-; tagging-; Pisces-; swimming-; models-; dispersal-; migration-
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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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Elliott, J. M., & Hurley, M. A. (1995). The functional relationship between body size and growth rate in fish (Vol. 9).
Schlüsselwörter: Fisch, Wachstum, Modell, Statistik
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Kappus, B., Holcik, J., & Salewski, V. (1995). Taxonomie von Neunaugen der oberen Donau (Vol. 8).
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Staud, K. (1995). Supervisor – Access-2.0-Anwendungen besser organisieren.
Schlüsselwörter: Datenbank, Access, Grundlagen
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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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Haertel, S. (1995). Selektion und Konsumtion juveniler Fische in einem kleinen eutrophen See. Diploma thesis, Universität Konstanz, Konstanz und Langenargen.
Schlüsselwörter: Fisch, Selektion, See, Konsumtion
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Haertel, S. (1995). Selektion und Konsumption juveniler Fische in einem kleinen eutrophen See. Konstanz: Universität.
Schlüsselwörter: Fisch, Parasit
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