Gisler, B. (1991). Vergleich des Freßverhaltens von Bachforellen (Salmo trutta fario L.) mit der Makroinvertebratendrift. Zürich: Eidgenössische technische Hochschule.
Schlüsselwörter: Fisch, Salmo, Nahrung, Verhalten
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Pedroli, J. - C., Zaugg, B., & Kirchhofer, A. (1991). Verbreitungsatlas der Fische und Rundmäuler der Schweiz. Neuchatel: Schweizerisches Zentrum für kartographische Erfassung der Fauna.
Schlüsselwörter: Fisch, Verbreitung, Gesamtwerk
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Schirmer, M. (1991). Verbreitung der Fische im Land Bremen (Vol. 41).
Schlüsselwörter: Fisch, Vorkommen, Bremen, Kartierung
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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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Salewski, V. (1991). Untersuchungen zur Ökologie und Biometrie einer Bachneunaugen-Population (Lampetra planeri) im Odenwald (Vol. 4).
Schlüsselwörter: Neunauge, Lampetra planeri, Biometrie, Bachneunauge, Vorkommen, Wachstum
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Köhler, C. (1991). Untersuchungen zur Fischartengemeinschaft des Rheins mit besonderer Berücksichtigung der intraspezifischen Variabilität morphometrischer Parameter von ausgewählten ubiquitären Arten. Frankfurt am Main: Johann Wolfgang Goethe Universität.
Schlüsselwörter: Fisch, Morphometrie, Rhein, Vorkommen
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Lepetit, M., Loranchet, S., Gillet, P., & Marion, J. M. (1991). Un Logiciel De Traitement Des Histogrammes De Structure De Population Par La M+Thode Des Differences Logarithmiques De Bhattachary (Vol. 41).
Zusammenfassung: The software “BHATTA”, achieved in Turbo Pascal on IBM PC makes possible histogram analysis for population structure. The base of the study is an analysis of population dynamics from histograms of size frequency. The program “BHATTA”, made from the method of logarithmic differences of Bhattacharya, cuts the histograms in order to display Gaussian components and to estimate the parameters: number (size of sample), mean and standard deviation for each generation or cohort to determine growth curves for each cohort.
Schlüsselwörter: Population, statistik, programm, pascal, lÄngenfrequenz, methode
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Meyer, C., & Flohr, U. (1991). True Stories – Was ist dran am TrueType-Font?.
Schlüsselwörter: Font, dokumentation, Grundlage
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Bax, N. J., Mehl, S., Godo, O. R., & Sunnana, K. (1991). Transparent multispecies analysis: an exploration of fisheries ans survey data off the Norwegian coast and Barents Sea (Vol. 193).
Schlüsselwörter: Fischerei, population, modell, Ökosystem, interaktion, statistik
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Murphy, B. R., Willis, D. W., & Springer, T. A. (1991). The Relative Weight Index in Fisheries Management: Status and Needs (Vol. 16).
Schlüsselwörter: Fischerei, statistik, wachstum, modell
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