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Autor  |
Juell, J. E.; Westerberg, H. | ||||
| Titel | An ultrasonic telemetric system for automatic positioning of individual fish used to track Atlantic salmon (Salmo salar L.) in a sea cage | Typ | Zeitschrift, Artikel | ||
| Jahr | 1993 | Publikation | Aquacult. Eng | Kurztitel der Zeitschrift | |
| Band | 12 | Ausgabe | 1 | Seiten | 1-18 |
| Schlüsselwörter | telemetrie, fische, methode, technik | ||||
| 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. | ||||
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| Organisation | Abschlussarbeit | ||||
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| Sprache | Sprache der Zusammenfassung | Originaltitel | |||
| Editor der Reihe | Titel der Reihe | Kurztitel der Reihe | |||
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| ISSN | ISBN | Medium | |||
| Bereich | Expedition | Konferenz | |||
| Notizen | Geprüft | nein | |||
| Rufnummer | 478 | Signatur | 2279 | ||
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