超音波魚群量計測に関する研究-1-重複計数とS型の読み取り値について〔英文〕

概要

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A preliminary consideration and method is presented for calculating the fish abundance index in the S-type echo counter for estimating fish stocks of concentrated fish. i) The mean density of fish per unit volume of water sampled is: n=4πr∑T∑PR112/P012(r1-r2)φnpσf ii) The total quantity of fish distributed around the waters surveyed is: Ns=∑(ni+Δn/2)(r1-r2)Ai The next paper will deal with the practical application of the above method.
日本水産學會の論文