| Naga
- The *ICLARM Quarterly
Vol.
25, No. 1 (January – March 2002)
Fishbyte
Results
of Bottom Trawl Surveys Carried Out in Vietnamese
Waters (20-200 m) in 1996-1997
V.
T. Daug, D. Tran, R. Nielsen and F. Riget
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%).
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Article (PDF 97 KB)
Length-Weight
Relationship of Fishes Caught by Trawl off Alexandria,
Egypt
M.
Abdallah
Abstract
This paper presents the length-weight relationship
parameters (a and b) for 29 fish species, belonging
to 16 families, taken by otter trawl fishing from
Egyptian Mediterranean waters. The b values obtained
ranged from 2.50 to 3.44 (with a mean of 2.926).
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Article (PDF 69 KB)
Length-weight Relationship of Bivalves from
Coastal Waters of Korea
K.Y.
Park and C.W. Oh
Abstract
Parameters a and b of the length
(L)-weight (W) relationship W
= a · Lb are presented for 17 commercial
bivalve species collected from the southwest coastal
waters of Korea. Estimates of b varied
between 2.44 (Atrina pinnata japonica)
and 3.31 (Scaphara broughtonii) with a
mean of 2.891 (± 0.212). A total of 2 107 specimens
were analyzed for this study. The length-weight
relationship was isometric in most of the species.
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Article (PDF 67 KB)
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