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Gaschütz, G., Pauly, D., & David, N. (1980). A versatile BASIC program for fitting weight and seasonally oscillating length growth data.
Schlüsselwörter: Statistik, wachstum, methode, formeln, theorie, basic, listing
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Landrum, J. L. (1989). Simplification methods for the World Vector Shoreline. Naval Ocean Research and Development Activity, NSTL Station, MS (USA).
Zusammenfassung: The fractal nature of the coastline makes it desirable to sample the World Vector Shoreline (WVS) data base in a manner related to the map scale at which it will be displayed. A survey of US Navy users has determined that several resolutions of the WVS are required. This report shows the relationship among vector data-base resolution, display device resolution, and map scale, then presents three simplification algorithms. These algorithms provide means of reducing the data-base resolution to that which is appropriate for a particular map scale and display device resolution. The discussion is supplemented with a series of maps illustrating the output of the simplification algorithms at several map scales.
Schlüsselwörter: mapping-; computer-programmes; data-processing; vectors-; automated-cartography; algorithms-
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Quitschau, K. (1987). Gelungene Nachzucht von Bachneunaugen, Lampetra planeri, im Aquarium.
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Völzke, V. (1988). Bestandsanalyse für die Güster (Blicca bjoerkna L.) und die Plötze (Rutilus rutilus L.) des Tegeler Sees (Berlin). Berlin: TU Berlin.
Schlüsselwörter: Fisch, Blicke, Blicca bjoerkna, Rotauge, Rutilus rutilus, Wachstum, Nahrung
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Angermeier, P. L., & Smogor, R. A. (1995). Estimating number of species and relative abundances in stream-fish communities: Effects of sampling effort and discontinuous spatial distributions (Vol. 52).
Zusammenfassung: The authors sampled fishes and measured microhabitat in series of contiguous habitat units (riffles, runs, pools) in three Virginia streams. Monte Carlo simulations were used to construct hypothetical series of habitat units, then examined how number of species, similarity in relative abundances, and number of microhabitats accumulated with increasing number of habitat units (i.e., sampling effort). The curves indicated that 90% of the species present were usually found by sampling 5 to 14 habitat units (stream length of 22-67 stream widths). Estimates of species relative abundances required less sampling effort for a given accuracy than estimates of number of species. Rates of species accumulation (with effort) varied among streams and reflected discontinuity in species distributions among habitat units. Most discontinuity seemed to be due to low population density rather than to habitat selectivity. Results from an Illinois stream corroborated our findings from Virginia, and suggested that greater sampling effort is needed to characterize fish community structure in more homogeneous stream reaches.
Schlüsselwörter: Fisch, Fließgewässer, Habitat, Verbreitung
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Eberstaller, J., Haidvogl, G., & Jungwirth, M. (1997). Gewässer- und Fischökologisches Konzept Alpenrhein. Internationale Regierungskommision Alpenrhein.
Schlüsselwörter: Fisch, Ökologie, Lebensraum, Rhein, Vorkommen, Kartierung
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Hutter, G. (2001). Vorkommen und Verbreitung von Flusskrebsen in Vorarlberg. Bregenz: Amt der Vorarlberger Landesregierung.
Schlüsselwörter: Krebs, Vorkommen, Verbreitung, Österreich
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Ebel, G. (2000). Habitatansprüche und Verhaltensmuster der Äsche Thymallus thymallus (Linneaus, 1758). Halle.
Schlüsselwörter: Fisch, Äsche, Thymallus thymallus, Habitat, Wanderung, Fortpflanzung, Wachstum
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Ebel, G. (2002). Untersuchungen zur Stabilisierung von Barbenpopulationen – dargestellt am Beispiel eines mitteldeutschen Fließgewässers. Doctoral thesis, Ebel, Guntram, Halle (Saale).
Schlüsselwörter: Fisch, Barbe, Barbus barbus, Biologie, Habitat, Fortpflanzung
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Fischer, P., & Wittkugel, C. (2002). Kartographische Erfassung von Fischlaichgebieten im Uferbereich des Bodensees.140.
Schlüsselwörter: Fisch, Laich, Fortpflanzung, Bodensee, GIS
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