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RISS 인기검색어
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- 저자 : Gambang, (검색결과 1 건)
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Ali, Rosidi bin,Gambang, Albert Chuan,Rajali, Hadil bin,Hassan, Raja Bidin bin Raja,Basir, Samusudin bin,Shiomi, Kunimune,Fujiwara, Shunji 한국수산자원학회 1998 한국수산자원학회지 Vol.1 No.-
Acoustic resource surveys were conducted by M/V SEAFDEC in the Gulf of Thailand and off the east coast of Peninsular Malaysia from September 5 to 28, 1995 for pre-NE monsoon season and from April 24 to May 17, 1996 for post-NE monsoon season, using the scientific echosounder FQ-70 (Furuno Electric Co.). Raw values of backscattering strength (SV) from the 200 ㎑ were carefully corrected and filtered to eliminate the influence of plankton. These corrected SV values were sorted out into pelagic and demersal fish, and were used to estimate biomass for each category of multi-species fish. Biomass of pelagic and demersal fish for each season was estimated both in the Gulf of Thailand within Thai EEZ and in the east coast of Peninsular Malaysia within Malaysian EEZ waters due to the availability of previous fisheries statistics and biological data. Dominant species were selected based on the fisheries statistics and landing place survey. Length (L) and weight were obtained from previous literature. Target strength (TS) of these dominant species were calculated as TS = 20 log (L) - 66. The distribution of the SV values for pelagic fish showed a distinct difference between pre and post monsoon seasons. Greater concentrations of SVs were observed from offshore compared to the nearshore waters in pre monsoon season. The distribution for the demersal fish showed that there was no clear difference between pre and post monsoon. The estimated biomass of multispecies fish in the Gulf of Thailand within Thai EEZ for the pre and post monsoon seasons was 9.2 × 10^5 tonnes (5.5 × 10^5 tonnes of pelagic fish and 3.7 × 10^5 tonnes of demersai fish) and 4.7 × 10^5 tonnes (2.0 × 10^5 tonnes of pelagic fish and 2.7 × 10^5 tonnes of demersal fish), respectively. The estimated biomass of multi-species fish off the east coast of Peninsular Malaysia within Malaysian EEZ for the pre and post monsoon seasons was 4.4 × 10^5 tonnes (2.3 × 10^5 tonnes of pelagic fish and 2.1 × 10^5 tonnes of demersal fish) and 3.1 × 10%5 tonnes (1.9 × 10^5 tonnes of pelagic fish and 1.2 × 10^5 tonnes of demersal fish), respectively.
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