Results of bottom trawl surveys carried out in Vietnamese waters (20-200 m) in 1996-1997

V.T. Dang, D. Tran, R. Nielsen and F. Riget

Naga, 2002, vol. 25, issue 1, 15-18

Abstract: 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%).

Keywords: Biomass; Catch composition; Catch/effort; Fishery surveys; Vietnam (search for similar items in EconPapers)
JEL-codes: Q00 (search for similar items in EconPapers)
Date: 2002
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Persistent link: https://EconPapers.repec.org/RePEc:wfi:wfnaga:35725

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