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Schmutz, S., Matheisz, S., Pohn, A., Rathgeb, J., & Unfer, G. (1994). Erstbesiedlung des Marchfeldkanals aus fischökologischer Sicht (Vol. 47).
Schlüsselwörter: Fisch, Besiedlung, Vorkommen
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Schulz, N. (1994). Schnäpel im Sinkflug. Der Ostseeschnäpel, eine weitere bedrohte Fischart? (Vol. 1).
Schlüsselwörter: Fisch, Ostseeschnäpel, Coregonus
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Schulz, U. (1994). Untersuchungen zur Ökologie der Seeforelle (Salmo trutta f. lacustris) im Bodensee. Konstanz: Hartung-Gorre Verlag.
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Schumann, U. (1994). Faunistisch-ökologische Untersuchungen an den Fischen in den Gräben und Tümpeln des NSG Federsee, unter besonderer Berücksichtigung der Schmerlen (Cobitidae). Tübingen: Eberhard-Karls-Universität.
Schlüsselwörter: Fisch, Noemacheilus, Misgurnus, Cobitis
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Schweiger, P. (1994). Befall und Beeinflussung der Blutwerte von Aalen des Bodensees durch den Schwimmblasenparasiten Anguillicola crassus. Doctoral thesis, Ludwig-Maximilians-Universität, München.
Schlüsselwörter: Fisch, Aal, Parasit, Anguilla anguilla, Anguillicola crassus, Blut, Wachstum, Wirt, Zwischenwirt
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Smukalla, R. (1994). Ökologische Effizienz von Renaturierungsmaßnahmen an Fließgewässern. Materialien, 7. Düsseldorf: Landesumweltamt Nordrhein-Westfalen.
Schlüsselwörter: Fisch, Fließgewässer, Renaturierung, Bewertung
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Sparre, P. J. (1994). The data requirements for basic fisheries bio-economics.
Zusammenfassung: The paper discusses the links between fish stock assessment and economics of fisheries, as perceived by a fisheries biologist. It focuses on the type and format of data required from the biological side as well as the economic side, to merge the biological and the economic methodologies into a bio-economic methodology. The biological methodology in question derives from the analytical approach, which operates with cohorts and size distributions of several stocks exploited by several fleets fishing on several fishing grounds. The economic methodology comprises costs and earnings analysis of the harvesting and the processing sectors, and computations of indicators for the economic performance of the sub-sectors. The paper is based on applications of bio-economics to tropical fisheries (targeting at shrimps). The methodology has been applied during a series of workshops and seminars organized by the Fisheries Department of FA0. The paper addresses both biologists and economists.
Schlüsselwörter: fishery-economics; stock-assessment; economic-feasibility
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Spiess, H. - J., Jährling, K. - H., & Raschewski, U. (1994). Rundmäuler und Fische der Elbe im Land Sachsen-Anhalt: – Verbreitung, Gefährdung und Schutz. Magdeburg: Ministerium für Umwelt, Naturschutz und Raumordnung Sachsen-Anhalt (Selbstverlag).
Schlüsselwörter: Kartierung, Gewässerverschmutzung, Artenschutz, Fisch, Elbe
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Stahlberg-Meinhardt, S. (1994). Warum “Durchgängigkeit” von Fließgewässersystemen? Begründung am Beispiel der Mühlkoppe (Cottus gobio, Linnaeus 1758) (Vol. 2).
Schlüsselwörter: Fisch, Wanderung, Fischaufstiegshilfe, Groppe, Cottus gobio
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Swain, D. P., & Sinclair, A. F. (1994). Fish distribution and catchability: What is the appropriate measure of distribution? (Vol. 51).
Zusammenfassung: The authors show that spatially uniform changes in abundance can affect catchability given certain models for the distribution of fishing effort, but that this effect is slight compared with the effect of changes in the spatial spread of fish distribution. An index of distribution is described that depends only on spatial spread: the minimum area over which a specified percentage of the population is spread. We tested the density dependence of this index using data on Atlantic cod (Gadus morhua) in the southern Gulf of St. Lawrence. Results depended on the percentage of the population for which the index was evaluated. The area containing most (90 or 95%) of the population was density dependent, expanding as population size increased. The area of highest cod concentration (i.e., the area containing 50% of the population) did not expand significantly as population size increased.
Schlüsselwörter: Fisch, Statistik, Population, Fischerei, Geographisch, Mathematik, Modell
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