보름달 및 유령해파의 군체에 의한 음향 산란 특성

Title
보름달 및 유령해파의 군체에 의한 음향 산란 특성
Alternative Title
Target Strength Characteristics of Multiple Gelatinous Organisms, Aurelia aurita, and Cyanea nozakii
Author(s)
강돈혁; 김정훈; 이형빈; 명정구
KIOST Author(s)
Kang, Don Hyug(강돈혁)Myoung, Jung Goo(명정구)
Alternative Author(s)
강돈혁; 김정훈; 명정구
Publication Year
2009-09-21
Abstract
Acoustic target strength (TS) information is essential parameter in the acoustic survey and target detection. Recently, the TS measurements have been conducted for the several gelatinous organisms, jellyfish. Although gelatinous organisms shape a large size patch in the ocean, the TS measurements were carried out for the single target with various bell sizes in many cases. Therefore, the TS information for multiple targets to be very closed each other is necessary. In the study, acoustic measurements of ex situ TS were made on living multiple jellyfish. The target species were Aurelia aurita and Cyanea nozakii, and carried 3-frequencies were 120, 200, and 420 kHz split-beam transducers. In order to arrange multiple targets, 9 A. aurita and 4 C. nozakii were used in the experiment. Totally, mean TS for both jellyfish has a trend to increase with an individual number and mean TS of the multiple A. aurita ranged from -72.7 to -57.9 dB and that of C. nozakii ranged from -61.9 and -49.3 dB. At the same arrangement of the multiple jellyfish, frequency dependency didn’t apparently appear in A. aurita, but it was apparently appeared in C. nozakii. As an additional case, mean TS of multiple C. nozakii together with symbiotic fish approximately -50 dB for all frequency. Considering C. nozakii ii lives together symbiotic fishes in the ocean, the result of the TS value suggests that the mean TS of multiple C. nozakii are very high because of symbiotic fish. The results can be applied to improve acoustic detection of the multiple jellyfish.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29349
Bibliographic Citation
The 10th Western Pacific Acoustic Conference, pp.1 - 8, 2009
Publisher
Western Pacific Commission for Acoustics (WPCA)
Type
Conference
Language
English
Publisher
Western Pacific Commission for Acoustics (WPCA)
Related Researcher
Research Interests

Fish ecology,Fish taxonomy,Fish stock enhancement,어류생태,어류분류,어류자원증식

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse