Unknown
Training Department, Southeast Asian Fisheries Development Center
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Samut Prakan, Thailand
In:
http://aquaticcommons.org/id/eprint/26353
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23782
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2019-03-22 07:10:41
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26353
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Southeast Asian Fisheries Development Center, Training Department
Publication Date:
2021-07-24
Description:
The abundance of fisheries resources and their structure in the Gulf of Thailand and East coast of Peninsular Malaysia were investigated during the SEAFDEC Collaborative Research Survey. Hydro-acoustic surveying using a scientific echo sounder model FQ-70 was conducted to estimate the fish abundance and biomass. Two survey cruises were carried out by M.V.SEAFDEC during the pre and post-northeast monsoon seasons. The scientific echo-sounder was equipped with an echo-integrator and two quasi-ideal beam transducers with operating frequencies of 50 and 200 kHz. The volume back scattering strength (SV) of the fish schools were collected from the layer of water at a depth from 10 m to the bottom along the track of survey cruise. The estimated biomass measured by high frequency shows clearly that a high concentration is observed at the upper and middle part of the Gulf of Thailand and the border area between Thailand and Malaysia waters during the pre-northeast monsoon season. Whereas, high biomass concentration shows only in the middle part of the Gulf of Thailand during the post-northeast monsoon season.
Keywords:
Fisheries
;
Marine fisheries
;
Fishery surveys
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Stock assessment
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Echo surveys
;
Biomass
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Monsoons
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South China Sea
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Gulf of Thailand
;
Malaysia
Repository Name:
AquaDocs
Type:
book_section
Format:
application/pdf
Format:
application/pdf
Format:
347-366
Format:
20
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