منابع مشابه
An injectable acoustic transmitter for juvenile salmon
Salmon recovery and the potential detrimental effects of dams on fish have been attracting national attention due to the environmental and economic implications. In recent years acoustic telemetry has been the primary method for studying salmon passage. However, the size of the existing transmitters limits the minimum size of fish that can be studied, introducing a bias to the study results. We...
متن کاملA new acoustic tailbeat transmitter for ®shes
A new acoustic transmitter for monitoring the tailbeat frequency of free-swimming ®shes and sharks is described. The transmitter is externally mounted on the ®sh's caudal peduncle and produces an acoustic pulse with every lateral movement of the tail. Field tests on obligate-swimming juvenile scalloped hammerhead sharks (Sphyrna lewini) show these transmitters accurately telemeter tailbeat de ̄e...
متن کاملPerformance limits of coded diversity methods for transmitter antenna arrays
Several aspects of the design and optimization of coded multiple-antenna transmission diversity methods for slowly time-varying channels are explored from an information-theoretic perspective. Both optimized vector-coded systems, which can achieve the maximum possible performance, and suboptimal scalar-coded systems, which reduce complexity by exploiting suitably designed linear precoding, are ...
متن کاملA Novel Acoustic Dissolved Oxygen Transmitter for Fish Telemetry
ate its performance in relation to field biotelemetry. When attached to fishes in the wild, the DO transmitter may be exposed to temporally and spatially changing temperatures. This issue is emphasized by laboratory studies on Atlantic cod (Gadus morhua) demonstrating how this species may decrease the preferred temperature as a response to hypoxia (Petersen and Steffensen, 2003). Accordingly, t...
متن کاملAn Energy Harvesting Underwater Acoustic Transmitter for Aquatic Animals
Acoustic telemetry is the primary method to actively track aquatic animals for behavioral studies. However, the small storage capacities of the batteries used in the transmitters limit the time that the implanted animals can be studied. In this research, we developed and implemented a battery-free acoustic transmitter that uses a flexible piezoelectric beam to harvest energy from fish swimming ...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1975
ISSN: 0001-4966
DOI: 10.1121/1.2002142