Measurement of Fish School Backscattering Strength Directivity Using Omnidirectional Scanning Sonar
نویسندگان
چکیده
منابع مشابه
Measurement of Fish School Backscattering Strength Directivity Using Omnidirectional Scanning Sonar*
The horizontal acoustic backscattering strength of a fish school is an important factor for fisheries and for estimation of the size of a fish school using omnidirectional scanning sonar. However, the backscattering strength of a fish school is influenced by their behavior and orientation because the individual fish in the fish school have strong directivity of target strength. This paper discu...
متن کاملDigital Scanning Sonar for Fish Feeding Monitoring in Aquaculture
Feed waste results in increased production costs to the cage fish farming industry and produces negative environmental impacts. A computerized system, consisting of digital scanning sonar and current meter, was developed for monitoring, assessment, and optimization of the fish feeding process. The system can detect and monitor quantity and direction of wasted food pellets and also predict the t...
متن کاملFrequency-directivity scanning in laboratory radar imaging
This work concerns an extension of usual radar imaging in which the pictures of the target do not simply exhibit the position of elementary reflectors but also give the behavior of these reflectors when the frequency and the direction of illumination vary. Essentially, the technique consists in describing the target by a generalized image which can be computed from the knowledge of the backscat...
متن کاملOmnidirectional Electric Fish
2439 What could an African lion stalking a distant impala in the African savanna possibly have in common with an electric fish searching for nearby water fleas in the Amazon River? Both the lion and the rather less daunting 14cm black ghost knifefish (Apteronotus albifrons) use sensory information to help them to locate and catch prey. But lions, which rely on their acute vision during the hunt...
متن کاملDirectivity Pattern Measurement of Ultrasound Transducers
Both diagnostic and therapeutic ultrasound applications require an understanding of the directivity patterns on the transducers to design ultrasound equipment and faithfully characterize the acoustic output from medical ultrasound devices. Since each ultrasound transducer has its own specific directivity pattern, the measurement of the directivity pattern is necessary. The objectives of this wo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Marine Acoustics Society of Japan
سال: 2016
ISSN: 0916-5835,1881-6819
DOI: 10.3135/jmasj.43.145