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Waterstraat, A. (1992). Populationsökologische Untersuchungen an Cottus gobio L. und anderen Fischarten aus zwei Flachlandbächen Norddeutschlands (Vol. 22).
Schlüsselwörter: Fisch, Groppe, Cottus gobio, Habitat, Population
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Ness, A., & Gebhardt, H. (1992). Fische als Indikatoren des Natürlichkeitsgrades von Makrostrukturen in Fließgewässern (Vol. 3).
Schlüsselwörter: Fisch, Indikator, Fließgewässer
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Scholz, A. (1992). Die Großmuscheln (Unionidae) im Regierungsbezirk Detmold – Verbreitung, Biologie und Ökologie der ostwestfälischen Najaden (Vol. 9).
Schlüsselwörter: Muschel, Vorkommen, Unionidae
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Hoffmann, A., & Linnert, H. (1992). Fischteiche in und an Fließgewässern – Barrieren für Bachfische, Verdriftung von Teichfischen (Vol. 4).
Schlüsselwörter: Fisch, Wanderung, Barriere
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Kuhn, M., & Kirchhofer, A. (1992). Habitatsbestimmende Faktoren beim Neunauge (Lampetra planeri) in vier Gewässern des Kantons Bern (Vol. 9).
Schlüsselwörter: Neunauge, Bachneunauge, Lampetra planeri, Habitat
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Fischer, C. (1992). Eine Datenbank für Computerviren.
Schlüsselwörter: Grundlagen, security, viren
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Weinhart, G. (1992). Futteraufnahmeversuche bei Felchenlarven (Coregonus lavaretus L.). München: Ludwig-Maximilians-Universität.
Schlüsselwörter: Fisch, Nahrung, Entwicklung, Wachstum, Coregonus
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Soriano, M., Moreau, J., Hoenig, J. M., & Pauly, D. (1992). New functions for the analysis of two-phase growth of juvenile and adult fishes, with application to Nile perch (Vol. 121).
Zusammenfassung: Two phases of growth can sometimes be distinguished in long-lived fish species. The first involves the growth of zooplankton-feeding juveniles and young adults. The second consists of accelerated growth of large, piscivorous adults. We present modified versions of the von Bertalanffy growth equation that account for this feature and fit them to length-at-age data on Nile perch Lates niloticus (Centropomidae) from Lake Chad (north and south) in north-central Africa, and from Lake Nasser in Egypt. The growth parameters estimated for the new equations allow one to make preliminary estimates of the energy gains by Nile perch associated with transition from zooplanktivory to piscivory.
Schlüsselwörter: Fischerei, wachstum, theorie, modell
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Terceiro, M., Fournier, D. A., & Sibert, J. R. (1992). Comparative Performance of MULTIFAN and Shepherd_s Length Composition Analysis (SRLCA) on Simulated Length-Frequency Distributions (Vol. 121).
Zusammenfassung: The authors simulated length-frequency distributions for 3-, 7-, and 13-age-class exploited populations (Peprilus triacanthus, Gadus morhua, Paralichthys dentatus, Pomatomus saltatrix ) to compare the performance of Shepherd's length composition analysis (SRLCA) and MULTIFAN in resolving the distributions to age frequencies. The length distributions were characterized by von Bertalanffy growth, variable recruitment, variable mortality, partial selectivity of fishing gear for the youngest age-groups, and a length-dependent trend in the standard deviation in length at age. Comparative performance of SRLCA and MULTIFAN was assessed quantitatively by using the Kolmogorov-Smirnov cumulative distribution test to compare calculated proportions at age with the simulated values. Shepherd's analysis provided a good return for the amount of computational resources invested, with limited subjective user input. In contrast, MULTIFAN offered a much more complex but powerful estimation technique, and performed consistently better than SRLCA in matching the simulated proportions at age.
Schlüsselwörter: Statistik, modell, lÄngenfrequenz, wachstum
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Müller, R. (1992). Die Fischfauna im Rhein bei Basel (Vol. 102).
Schlüsselwörter: Fisch, Vorkommen, Kartierung, Schweiz
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