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Sparre, P. (1987). A method for the estimation of growth, mortality and gear selection/recruitment parameters from length-frequency samples weighted by catch per effort (D. Pauly, & G. R. Morgan, Eds.) (Vol. 13). MAZZARA-DEL-VALLO,-ITALY.
Zusammenfassung: This paper describes a method and a FORTRAN program for the estimation of von Bertalanffy growth parameters, total mortality rates and gear selection/recruitment parameters from a time series of length-frequency samples weighted by catch per effort (e.g., numbers caught per hour by length class each quarter of the year). The length frequencies are separated into normally distributed components each of which represents a cohort. This method is constructed to allow for continuous, seasonally variable recruitment all year-round and is intended to be used especially for tropical and other fish stocks displaying an appropriate recruitment pattern.
Schlüsselwörter: stock-assessment; recruitment-; size-distribution; length-; mathematical-models, marine-fisheries
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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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Speierl, T. (2000). Die Fischgemeinschaften unterschiedlich strukturierter Flussbereiche: Auswirkungen von Renaturierungsmaßnahmen auf die Fischfauna im oberfränkischen Main. Bayreuth: Universität Bayreuth.
Schlüsselwörter: Fisch, Renaturierung
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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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Spindler, T. (1988). Ökologie der Brutfische in der Donau bei Wien. Wien: Universität.
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Sposny, W. (1975). Die Fischfauna des Rheins. Mainz: Universität.
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Staas, S. (1997). Das Jungfischaufkommen im Niederrhein und in angrenzenden Nebengewässern unter Berücksichtigung der Uferstrukturen am Strom. Schriftenreihe der Landesanstalt für Ökologie, Bodenordnung und Forsten. Recklinghausen: Landesanstalt für Ökologie, Bodenordnung und Forsten/Landesamt für Agrarordnung Nordrhein-Westfalen.
Schlüsselwörter: Fisch, Rhein, Vorkommen, Habitat, Jungfische
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Stadler, H. (1961). Die Fische von Unterfranken. Lohr am Main: Verlag C. Keller.
Schlüsselwörter: Fisch, Vorkommen
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Staginnus, D. (2000). Untersuchungen und Methoden zu Substratwahl und Strömungspräferenz des Steinbeißers Cobitis taenia (LINNAEUS, 1788),(Cobitidae). Braunschweig: Carolo-Wilhelmina-Universität.
Schlüsselwörter: Fisch, Habitat, Substrat, Methode, Steinbeißer, Cobitis taenia
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Stahlberg, S. (1985). Das Schwimmverhalten von Bachschmerle (Noemacheilus barbatulus) und Gründling (Gobio gobio) in strömendem Wasser. Braunschweig: Carolo-Wilhelmina-Universität.
Schlüsselwörter: Fisch, Bachschmerle, Noemacheilus barbatulus, Gründling, Gobio gobio, Verhalten
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