Results of bottom trawl surveys carried out in Vietnamese waters (20-200 m) in 1996-1997
Bottom trawl surveys were conducted in the southwest monsoon season in 1996 (survey 1) and in the northeast monsoon season in 1996-97 (survey 2) throughout Vietnamese waters. The surveys mainly covered the depth zone 50-200 m but in the northeast monsoon season the depth zone 20-50 m was included in the northern and southern areas. Overall, 273 trawl hauls were conducted. The total biomass for Vietnamese waters in the depth zone 20-200 m was estimated at 700 000 t . Biomass estimates are given for the most abundant species. A relatively higher mean catch-per-unit effort (CPUE) was obtained from survey 2 than from survey 1 and in partcular at depth ranges 50-100 and 100-200 m in south Vietnam. Overall, the dominant families were Monacanthidae (34%), Carangidae (15%), Trichiuridae (9%) and Synodontidae (6%).
| Main Authors: | , , , |
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| Format: | article biblioteca |
| Language: | English |
| Published: |
2002
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| Subjects: | Fisheries, Biomass, Catch composition, Catch/effort, Fishery surveys, Vietnam, |
| Online Access: | http://hdl.handle.net/1834/25757 |
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