By I.L. Kalikhman
In the past, there has now not been any paintings that systematically provides the topic of acoustic fish reconnaissance, info all significant points of making use of acoustic apparatus in advertisement fish reconnaissance, and gives adequate research of the effectiveness of fish-finding options. Acoustic Fish Reconnaissance responds to this want by means of offering the 1st evaluation of the theoretical and useful facets of acoustic seek, detection, interpretation, and inhabitants estimation for advertisement benefit.This e-book can pay specific realization to the speculation and perform of accounting surveys for quantitative estimation of organic assets and fishing stipulations in conventional fishing parts. It additionally analyzes a number of functions of acoustic method, established upon the authors' vast investigations. The textual content contains the result of the applicability of fish-finding tools, and provides tips about the improvement of more desirable acoustic recommendations for advertisement fleets.
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Extra info for Acoustic Fish Reconnaissance (Marine Science)
Acoustic Fisheries Prospecting, Sudostroenie, Saint-Petersburg, 187, 1992 (in Russian). 19. , VNIRO, Moscow, 7, 1983 (in Russian). 20. , Rapports et Proces-Verbaux des Reunions, 170, 185, 1977. 21. , Apparatus and experimental technique for the study of ultrasonic backscattering by biological objects in water, Oceanology, 14(1), 149, 1974 (translated from Russian). 22. , VNIRO, Moscow, 26, 1981 (in Russian). fm Page 32 Thursday, February 2, 2006 10:29 AM 32 Acoustic Fish Reconnaissance 23. , An in situ technique to determine ﬁsh target strength with results for blue whiting Micromesistius poutassou (Risso), Journal du Conseil Permanent International pour l’Exploration de la Mer, 40, 153, 1982.
Hydroacoustic signal classiﬁcation of ﬁsh schools by species, Canadian Journal of Fisheries and Aquatic Sciences, 45, 597, 1988. 27. , In situ measurements on the target strength of pelagic ﬁshes, FAO Fisheries Report, 300, 99, 1983. 28. , Fish target strength for use in the echo integrator surveys, Journal of the Acoustical Society of America, 88, 1543, 1987. 29. , Density and in situ target strength of herring and sprat: A comparison between two methods of analysing single-beam sonar data, Fisheries Research, 6, 305, 1988.
15) where R is the radius of a cylinder, L is the length of a cylinder, and I1 is the Bessel function of the ﬁrst order. Fish swim bladders have various shapes and relative dimensions. 15). 4. 2), the experimental and theoretical results are close. With Lﬁsh > 40 cm, alternation of increase and decrease in scattering occurs. This phenomenon is in conformity with the existing theory of scattering on acoustically rigid items; however, applied to the sound scattering by ﬁsh, it requires a detailed veriﬁcation by experiments.
Acoustic Fish Reconnaissance (Marine Science) by I.L. Kalikhman