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Simon, K. H. (1991). Doppelblick – Praktische Aspekte der Umweltinformatik.
Schlüsselwörter: Modell, methode, simulation, zusammenfassung
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Reck, S. (1991). Texte und Zeichen – Dateiformate von Textverarbeitungsprogrammen: WP, Word, WordStar und RTF.
Schlüsselwörter: Formate, textverarbeitung, dokumentation
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Ebeling, A. (1991). Dominanz in der Mitte – Zur Allgegenwart der Statistik.
Schlüsselwörter: Statistik, methode, zusammenfassung
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Börner, W. (1991). Verkabelte Welten.
Schlüsselwörter: Netzwerk, Grundlage, theorie, zusammenfassung
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Steiner, W. (1991). Windows am Draht.
Schlüsselwörter: DfÜ, windows, tips
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Behr, B. (1991). IFF-Definitionen.
Schlüsselwörter: Daten, grafik, formate, dokumentation, norm
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Borchers, D. (1991). Globale Netze.
Schlüsselwörter: DfÜ, zusammenfassung, vergleich
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(1991). Was ist TCP/IP.
Schlüsselwörter: Netzwerk, theorie, norm, Grundlage
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Schweigert, J. F. (1991). Multivariate Description of Pacipic Herring (clupea Harengus p.) Stocks from Size and Age Information (Vol. 48).
Schlüsselwörter: Fischerei, statistik, multivariat, genetik, morphologie, methode
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France, R., Holmes, J., & Lynch, A. (1991). Use of size-frequency data to estimate the age composition of crayfish populations (Vol. 48).
Zusammenfassung: Age-classes in crayfish populations can be determined from size-frequency data provided 4 tents are adhered to only crayfish collected from areas of rock substrate are used; trapping are excluded; species do not have longevities exceeding about 4 yr; and most importantly, sample sizes are greater than about 200. Studies that have failed to follow these guidelines have met with limited success in dissecting mixed frequency distributions. Further, 3 validation procedures must be undertaken: temporal replication within molting events to measure the precision of both data collection and size-frequency analysis; corroboration with known-age crayfish from either field recaptures or laboratory molt increments; and concordance with independent analysis of the mean size at onset of sexual maturity. When these checks support the size-frequency results, population age composition and analyses of rates of growth or mortality can be considered reliable.
Schlüsselwörter: Krebs, lÄngenfrequenz, methode, statistik, population
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