ACOUSTIC TAG HAVING A DIGESTIBLE FUSE

Acoustic tags have been used for years in fisheries research to study survival and behavior of fish in various aquatic environments. The described techniques, devices and systems enhance the ability of researchers to understand the effect on fish mortality by predators through an acoustic tag that i...

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Bibliographische Detailangaben
Hauptverfasser:	ALLEN, WILLIAM W, HEMMINGS, SCOTT E, JOHNSTON, SAMUEL V
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AGRICULTURE ANALOGOUS ARRANGEMENTS USING OTHER WAVES ANIMAL HUSBANDRY BASIC ELECTRIC ELEMENTS CARE OF BIRDS, FISHES, INSECTS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES FISHING FORESTRY HUMAN NECESSITIES HUNTING LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING NEW BREEDS OF ANIMALS PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR RELAYS SELECTORS TESTING TRAPPING
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Beschreibung
Zusammenfassung:	Acoustic tags have been used for years in fisheries research to study survival and behavior of fish in various aquatic environments. The described techniques, devices and systems enhance the ability of researchers to understand the effect on fish mortality by predators through an acoustic tag that includes a digestible fuse. When the implanted acoustic tag comes in contact with the digestive fluids in a predator's stomach, the fuse coating is dissolved causing the fuse to disintegrate and result in an open circuit. The open circuit in turn signals the electronics in the acoustic tag that the tagged fish has been consumed. In response, the electronics alter the tag transmit signal to indicate that predation has occurred.