Hsu, C. C. (1991). Parameters Estimation of Generalized von Bertalanffy Growth Equation (Vol. 26).
Schlüsselwörter: Fischerei, statistik, wachstum, methode, modell, theorie
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Mohn, R. (1991). Length-Based Virtual Population Analysis; A Review and Swordfish Example.
Zusammenfassung: Length-based population analyses have had a fairly long but not too successful history. These methods are required over a range of situations from when aging is impossible to when it is difficult or prohibitively expensive. There have been 3 sorts of approaches: 1) modal analysis to convert length frequencies to ages 2) age-length key enhancement and 3) imbedded growth models. The last group is what is generally known as length-based methods and the focus of this review. At the 1991 ICES Methods Working Group, 5 techniques were compared and these results are summarized. Two of these techniques, cohort slicing and length-based ADAPT, are applied to swordfish (Xiphias gladius ) data. The imbedded growth model for the former technique is the mean size at age while the latter uses the distribution of size at age. A new method is also presented which begins with cohort slicing then estimates numbers at age and enhances an inferred age-length key at each step of an iterative process.
Schlüsselwörter: Fischerei, population, cpue, lÄngenfrequenz, wachstum, modell, statistik
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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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(1991). Kreis Herford: Fische der Fließgewässer. Herford: Amt für Landschaftsökologie.
Schlüsselwörter: Fisch, Verbreitung, Vorkommen, Kartierung
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1991. (1991). Die Fische des Chiemsees. Prien: Columba Verlag.
Schlüsselwörter: Fisch, Arteninventar, See
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Born, O. (1991). Fischaufstiegshilfen unter besonderer Berücksichtigung bayerischer Fließgewässer. München: Technische Universität.
Schlüsselwörter: Fisch, Wanderung, Hindernis, Wehr, Fischaufstiegshilfe
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Criddle, K. R. (1991). Modelling dynamic fish populations. Seattle, WA (USA): National Marine Fisheries Serv.
Zusammenfassung: A recently introduced multivariate state-space time-series modeling algorithm, system-theoretic time-series, can be used to create a particularly robust state-space representation. Combining the model approximation methodology with time-series modeling of the residuals in accurate models of short-run dynamics. The approximate structural modeling methodology is illustrated with single species models of yellowfin sole (Limanda aspera ) biomass, and multispecies models of Pacific halibut (Hippoglossus stenolepis ), yellowfin sole, and red king crab (Paralithodes camtschatica ) biomasses in the eastern Bering Sea. A final application of the approximate structural/system-theoretic time-series model includes walleye pollock (Theragra chalcogramma ), Pacific halibut, Pacific cod (Gadus macrocephalus ), yellowfin sole, and red king crab. (Prepared in cooperation with Alaska Univ., Fairbanks.)
Schlüsselwörter: fishery-biology; commercial-species; Limanda-aspera; Hippoglossus-stenolepis; Paralithodes-camtschatica; Theragra-chalcogramma; Gadus-macrocephalus; mathematical-models; biomass-; INE,-USA,-Alaska
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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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Diercking, R., & Wehrmann, L. (1991). Artenschutzprogramm: Fische und Rundmäuler in Hamburg. Hamburg: Umweltbehörde Hamburg.
Schlüsselwörter: Fisch, Vorkommen, Verbreitung, Kartierung
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Dost, U. (1991). Fischbiologische Untersuchungen an einer neu eingestauten Talsperre (Kleine Kinzig, Nordschwarzwald). Hohenheim: Universität.
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