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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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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Deller, K. (1991). Die Rolle der Bachforelle (Salmo trutta forma fario L.) als Konsument des Makrozoobenthos in einem Mittelgebirgsbach (Steina/Südschwarzwald). Diploma thesis, Universität, Konstanz.
Schlüsselwörter: Fisch, Bachforelle, Salmo trutta fario, Nahrung, Wachstum, Fließgewässer
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Hofer, R., & Bucher, F. (1991). Zur Biologie und Gefährdung der Koppe (Vol. 44).
Schlüsselwörter: Groppe, Cottus gobio, Fisch, Biologie, Gefährdung
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McKenna, J. E., & Saila, S. B. (1991). Application of an Objective Method for Detecting Changes in Fish Communities: Samar Sea, Philippines (Vol. 4).
Schlüsselwörter: Fischerei, statistik, Ökosystem, methode, programm, simulation
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Schmid, J. (1991). Einiges über die Äsche (Vol. 1991).
Schlüsselwörter: Fisch, Biologie, Thymallus, Beschreibung
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Schirmer, M. (1991). Verbreitung der Fische im Land Bremen (Vol. 41).
Schlüsselwörter: Fisch, Vorkommen, Bremen, Kartierung
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Hiramatsu, K. (1991). Possible Biases in the VPA Estimates of Population Sizes of the Plus Group (Vol. 39).
Zusammenfassung: Biases in estimating population sizes of the plus group are examined for bluefin tuna (Thunnus ) and swordfish (Xiphias gladius ). It is shown that the VPA estimates used in the 1990 ICCAT assessment are sensitive to the systematic ageing errors. The biases in the estimates of population sizes of the plus group might increase exponentially with tracing back to the earlier year.
Schlüsselwörter: Fischerei, statistik, vpa, population, methode, theorie, mathematik
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