Uiblein, F., & Jagsch, A. (1994). Wassertemperatur, Laichaktivität und Laichplatzwahl-Beobachtungen an der Salzach-Äsche, Thymallus thymallus (Pisces; Salmonidae) (Vol. 4). Vienna: Konrad-Lorenz-Institut für vergleichende Verhaltensforschung.
Schlüsselwörter: Temperatur, Äsche, Thymallus thymallus, Fortpflanzung, Fisch, Habitat
|
Juell, J. E., & Westerberg, H. (1993). An ultrasonic telemetric system for automatic positioning of individual fish used to track Atlantic salmon (Salmo salar L.) in a sea cage (Vol. 12).
Zusammenfassung: A telemetric system for automatic positioning of individual fish in the vertical or horizontal plane is described. The position of a transmitter in a fish is computed from the difference in arrival time of the ultrasonic signal to a fixed array of hydrophones. Sources of error in positioning are discussed. In a preliminary study, the resolution of the system in time and space was adequate to monitor the behaviour of adult salmon in a sea cage. At moderate stocking density the salmon was swimming continually in counter-clockwise circles and diel rhythms in swimming speed, depth and path-radius were observed. With only 30 fish in the cage this stereotype behaviour broke down. Few or no visits into the feeding area during some feedings indicated a variable feeding motivation.
Schlüsselwörter: telemetrie, fische, methode, technik
|
Tan, X., Kim, D., Usher, N., Laboy, D., Jackson, J., Kapetanovic, A., et al. (2006). An Autonomous Robotic Fish for Mobile Sensing. In Proceedings of the 2006 IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 5424?5429).
Zusammenfassung: In this paper an innovative approach to robotics education is reported, where hands-on learning is integrated with cutting-edge research in the development of an autonomous, biomimetic robotic fish. The project aims to develop an energy-efficient, noiseless, untethered swimming robot for mobile sensing purposes. The robot is propelled by an ionic polymer-metal composite (IPMC) actuator and equipped with a GPS receiver, a ZigBee wireless communication module, a microcontroller, and a temperature sensor for autonomous navigation, control, and sensing. The two phases of the development are described, emphasizing both the technical approaches and the learning paradigms. The developed robotic fish will be further used as an educational kit for K-12 students and as a research tool for investigating multi-robot collaborative sensing.
Schlüsselwörter: Technik, Roboter, GPS, Umweltdaten
|
Zink, R. (1989). ANSI, die zweite.
Schlüsselwörter: Tastatur, methode
|
Gronek, G. (1995). Ähnlichkeiten gesucht – Fehlertoleranter Suchalgorithmus `Shift-AND`.
Schlüsselwörter: suchen, algorithmus, textverarbeitung, theorie, c, listing
|
Stahlberg, S., & Peckmann, P. (1986). Bestimmung der kritischen Strömungsgeschwindigkeit für einheimische Kleinfischarten (Vol. 76).
Schlüsselwörter: Strömungsgeschwindigkeit
|
Jungwirth, M., & Winkler, H. (1983). Die Bedeutung der Flussbettstruktur für Fischgemeinschaften (Vol. 35). Österreichische Wasserwirtschaft.
Schlüsselwörter: Struktur, Fisch, Habitat
|
Bohle, E., & Lehmann, R. (1989). Zur Bedeutung der Struktur von Fließgewässern für das Fischleben (Vol. 46). Arb. dt. Fischverband.
Schlüsselwörter: Struktur, Fisch
|
Hiramatsu, K., Akamine, T., & Kitada, S. (1995). Effectiveness of partial likelyhood of estimating fish mortality rates from tag recoveries and the stock composition in the mixed population based on genetic data.
Zusammenfassung: Because of the simplicity of calculation and the availability of evaluating the precision of the estimates, a partial likelihood approach has been used for estimating fish mortality rates from tag recoveries and the stock composition in the mixed population based on genetic data. We compare the partial likelihood estimator with the full likelihood estimator, and find that under some conditions, both estimators are the same. The above applications meet the conditions and hence the estimates using the partial likelihood are the same as the ones using the full likelihood. In this case, the partial likelihood approach is quite useful.
Schlüsselwörter: stock-assessment; tagging-; genomes-; fishing-mortality; mixing-ratio; mathematical-analysis
|
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
|
