Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Use of Geographical Parameters of Fish School in the Estimation of Fish School Abundance Using Scanning Sonar

스캐닝 소너에 의한 어군량 추정에 있어서 어군의 기하학적 파라메터의 이용

  • Published : 2002.08.01
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Abstract

The object of this study was to find out the probability of the abundance estimation by geographical parameters of fish school during the acoustic survey using scanning sonar. The acoustic survey was carried out in Funka Bay, off southern Hokkaido, Japan in December 1998. The 180-degree scanning sonar and the echo sounder were used simultaneously. The relationship was examined between geographical parameters (fish school area and volume) measured by sonar and area back scattering coefficient by the echo sounder. The obtained result showed positive correlation. Therefore, the use of geographical parameters of fish school is a useful method in estimating fish school abundance in the acoustic survey using sonar.

어군의 기하학적 파라메터를 이용한 어군량 추정에 대한 기초적 연구로서, 소너와 계량어군탐지기를 동시에 사용하여 소너 화상으로부터 어군의 기하학적 파라메터, 면적 및 체적을 계측하고, 계량어군탐지기로 측정한 면적후방산란계수와의 관계를 비교, 분석한 결과를 요약하면 다음과 같다. 1. 면적후방산란계수 (S/sub A/) 는 어군면적 (S/sub F/) 과의 사이에는 S/sub A/ = 78,842 S/sub F/ 0.46의 관계가 성립하였고 어군체적 (V/sub F/)과의 사이에는 S/sub A/= 30,895 V/sub F/ 0.37의 관계가 성립하였으며, 각각의 상관계수는 0.76 이었다. 2 소너로 관측된 어군의 기하학적 파라메터가 어획량이나 계량어군탐지기에 의한 면적후방산란계수와 유의한 상관이 있으면, 이들을 이용한 어군량 추정은 가능할 것으로 판단된다.

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References

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