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  • 11
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    Species composition, abundance and biomass distribution of zoobenthos in Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26379 | 23782 | 2019-04-05 08:42:20 | 26379 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The benthic invertebrate (zoobenthos) fauna in Vietnamese seawaters was surveyed in April - May, 1999. Zoobenthos specimen were sampled by Smith-McIntyre grab on 38 stations and 180 species were recorded and composed of 5 major groups: Polychaeta, Crustacea, Mollusca, Echinodermata and others. The total of density and biomass zoobenthos in Vietnamese seawaters was 156.7 ind/m2 and 5943.0 mg/m2 respectively. Polychaeta and Mollusca were groups with the highest abundance in every cases considered. The remaining groups of zoobenthos such as Crustacea and Echinodermata which were lower in abundance but higher in biomass. There was a remarkable variation of zoobenthos both in species composition and density with the depth, substrate and spatial distribution. Abundance was higher in some subjects considered such as: in depth of 0 - 60m or in types of sandy components or in the Tonkin gulf and the Southeast regions. All diversity indices shown that water quantity in Vietnamese sea offshore in survey time was just satisfactory and good.
    Keywords: Fisheries ; Oceanography ; Geographical distribution ; Community composition ; Species diversity ; Abundance ; Check lists ; Zoobenthos ; Viet Nam
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 55-76
    Format: 22
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  • 12
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    Proceedings of the 4th Technical Seminar on Marine Fishery Resources Survey in the South China Sea, Area IV: Vietnamese Waters, 18-20 September 2000 (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26373 | 23782 | 2019-04-04 03:17:24 | 26373 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: This, the fourth in the series of Technical Seminars on Marine Resources Survey, continues the essential evaluation of marine resources available in the South China Sea. This latest seminar is an evaluation of the waters of Vietnam. In the series of surveys this is identified as Area IV, There are two vital results from the survey activities; the first of these is that the scope, species composition and biomass estimation of the regional waters are assessed. Secondly another aspect is emphasized, that of the element of cooperation between the nations of the region such that no one country is isolated.
    Keywords: Fisheries ; Viet Nam ; Living resources ; Marine fish ; Fishery surveys ; Check lists ; Biomass ; International cooperation
    Repository Name: AquaDocs
    Type: book
    Format: application/pdf
    Format: application/pdf
    Format: 434
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  • 13
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    Selective Fisheries Information Service Phase II: Project ADD (Analysis and Document Delivery) (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26371 | 23782 | 2019-04-04 01:28:43 | 26371 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Keywords: Fisheries ; Information Management ; Information services ; Information centres ; Information handling ; Information retrieval ; Information systems ; Documents
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 197-209
    Format: 13
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  • 14
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    Composition, abundance and distribution of zooplankton in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26380 | 23782 | 2019-04-05 08:41:33 | 26380 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The samples of 58 stations in Vietnamese Waters were collected by M.V. SEAFDEC on 21 April - 5 June 1999. Thirty-seven groups of zooplankton were found in this study. Copepoda was the most abundance followed by Chaetognatha and Ostracoda. Biomass varied from 0.21-7.29 ml/m3 (average 1.03±1.22 ml/m3). Station 56 has the highest biomass. Abundance varied from 99-2,365 ind/m3 (average 580±527 ind/m3). Station 58 has the highest abundance due to high number of Chaetognatha, polychaete, Lucifer spp., Thecosomes and Echinodermata larvae. Whereas Station 19 has the lowest abundance. Cephalopod paralarvae were concentrated. They were classsified into 15 genera belonging to 11 families: Sepia sp., Inioteuthis sp, Loligo spp., Enoploteuthis sp., Abralia sp., Watasenia sp., Onychoteuthis sp., Ctenopteryx sicula, Nototodarus sp., Sthenoteuthis oualaniensis, Thysanoteuthis rhombus , Liocranchia sp., Teuthowenia sp., Octopus defilippi, Octopus Type A, Octopus Type B, Octopus Type C and Tremoctopus sp. Sthenoteuthis oualaniensis found to be most abundance followed by Octopus Type B and Enoploteuthis. Sthenoteuthis oualaniensis found mostly in the middle part of Vietnamese waters especially in the oceanic zone.
    Keywords: Fisheries ; Oceanography ; Geographical distribution ; Community composition ; Abundance ; Zooplankton ; Check lists ; Copepoda ; Ostracoda ; Chaetognatha ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 77-93
    Format: 17
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  • 15
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    Assessment of relative abundance of fishes caught by gillnet in Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26375 | 23782 | 2019-04-04 03:33:52 | 26375 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The fisheries resources in near shore waters of Vietnam are reported to be overexploited resulting on the decrease of CPUE. It is important to develop the off-shore fisheries in Vietnam now. However information on off-shore fisheries resources in Vietnam was still very limited. This study was designed in order to supply such kind of information. The study area was in off-shore waters of Vietnam. R/V BIEN DONG (1500 Hp) with gillnet of 5 different mesh-size (73, 95, 123, 150 and 160 mm) was used for survey. The species and catch composition, distribution of promising species, relative abundance of target species were described. As a results, 98 species belonged to 32 families have been identified. Skipjack tuna was dominant (18.5 %). Distribution of relative abundance of some major species were given.
    Keywords: Fisheries ; Marine fisheries ; Catch composition ; Abundance ; Check lists ; Catch/effort ; Gillnets ; Viet Nam
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 10-28
    Format: 19
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  • 16
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    Composition, abundance and distribution of fish eggs and larvae in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26381 | 23782 | 2019-04-05 08:37:05 | 26381 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: This report is based on the data of fish eggs and larvae samples which were collected at the 58 stations of the Vietnamese waters, it covered from latitude 7° - 21° N and longitude 103° - 112° E. The cruise was carried out from April 30 to May 29, 1999 by M/V SEAFDEC. The Standard larvae net and Bongo net were used for the surface and oblique sampling respectively and 14,507 fish eggs and 18,919 fish larvae were caught. The specimens have been identified, which comprise of 78 families, 94 genera, 94 species of fish eggs and larvae observed from this cruise. The most abundant fish eggs and larvae during the survey were Engraulidae, accounted for 8.5% total of eggs and 23.8% total of larvae. The species composition was observed to be very abundant. In each station, at least 6 families and the highest 30 families were collected during the survey. The abundance of ichthyoplankton is rather relatively high, the distribution occurred mainly in the areas of along the coastal, near estuaries and around the islands. The abundance of fish eggs concentrated higher than fish larvae. The density of distribution of fish eggs and larvae in the North Sea waters concentrated the most abundant of all and of the Central sea waters was the least abundant of all. Some of families of which fish eggs and larvae have dominated were presented.
    Keywords: Biology ; Fisheries ; Oceanography ; Dominant species ; Geographical distribution ; Ichthyoplankton ; Fish eggs ; Abundance ; Check lists ; Ichthyoplankton surveys ; Fish larvae ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 94-145
    Format: 52
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  • 17
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    Fisheries and fishery statistical system in Bangladesh (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26891 | 23782 | 2019-11-12 08:30:17 | 26891 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Following a brief account of the structure of the fishery sector in Bangladesh, an outline is given of fishery policy towards 2010. Before 1980, there was no statistical system for fisheries in Bangladesh. In the present system, fishery statistics are collected according to the survey manual. Catch assessment surveys for each of the 3 sectors (open-water, closed-water and marine) are undertaken; each of the surveys is designed as a sample of 1, 2, and 3 stage sampling for estimating total catches on the basis of data of sample units, which are collected by the Fishery Survey Officers. Details are given of proposals to improve the national fisheries statistics system.
    Keywords: Fisheries ; Marine fisheries ; Data processing ; Fishery statistics ; Inland fisheries ; Fish catch statistics ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 15-26
    Format: 12
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  • 18
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    Fishery and aquaculture statistics in Asia: Proceedings of the FAO/SEAFDEC Regional Workshop on Fishery Statistics, Bangkok, Thailand, 19-21 August 1997 (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26889 | 23782 | 2019-11-14 01:12:44 | 26889 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: This volume provides the papers presented at the Workshop, which was conducted to assess the fishery and aquaculture statistics in the Southeast Asian region with a view to recommending ways and means to improve their compilation and dissemination. Abstracts of the papers are cited individually in this issue of ASFA.
    Keywords: Fisheries ; Data processing ; Fishery statistics ; Conferences ; Aquaculture statistics ; Fishery development ; Data acquisition ; Marine
    Repository Name: AquaDocs
    Type: book
    Format: application/pdf
    Format: application/pdf
    Format: 332
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  • 19
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    Korean fishery statistical system (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26895 | 23782 | 2019-11-12 08:21:30 | 26895 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The Republic of Korea has a well-organized data collection system of fishery statistics for the purpose of providing information for the establishment of the national fishery policy. Details are given of the National Fishery Statistical Survey (conducted once a year), the Scientific Fishery Statistical Survey (conducted by the National Fisheries Research and Development Institute), and Fishery Censuses (conducted whenever required).
    Keywords: Fisheries ; Marine fisheries ; Data processing ; Fishery statistics ; Fishery surveys ; Inland fisheries ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 68-74
    Format: 7
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  • 20
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    Catch rate of oceanic squid by jigging method in the South China Sea Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26256 | 2002 | 2019-03-01 06:05:12 | 26256 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: This paper presents the preliminary result of the exploratory fishing for oceanic squid by automatic jigging method in the South China Sea Area III: western Philippines. This was part of SEAFDEC’s collaborative research survey on the fisheries resources of Area III with focus on tuna, oceanic squid and other migratory species. The research vessel M/V SEAFDEC covered 31 predetermined stations for oceanographic and fisheries survey, 10 of which were squid jigging stations. Jigging effort of four automatic jiggers at each station varied from 2-8 hours. The Indo-Pacific squid, Sthenoteuthis (Symplectoteuthis) oualaniensis (Lesson, 1830) was the only species caught throughout the fishing area. The total catch for 51.6 fishing hours consisted of 2538 individuals weighing 393.1 kg. The female-dominated catch had individuals with mantle length ranging from 9.8-24 cm and average weight of 155g. Catch-per-unit-effort (CPUE) of automatic jiggers averaged 6 ind/line/hour (968 g/l/h) or 0.4 ind/jig/h (45 g/j/h). High concentration of squid was observed at the northern portion of the survey area. Catch rates were high within 0-100 m jigging depth. S. oualaniensis in Area III occurred in two forms: the dwarf, early-maturing form without dorsal photophore (9.8-12 cm mantle length;43 g average weight) and the middle-sized form with dorsal photophore (12-24 cm ML;174 g average weight). The middle-sized form dominated the catch representing 86% of the total catch. The dwarf form was less abundant in all catches but occurred throughout the area. The middle-sized and dwarf forms had total weight of 377.5 kg (2175 individuals) and 15.6 kg (363 individuals), respectively. The females were dominant in both forms. The biomass of S. oualaniensis standing stock in the SCS Area III was estimated at 283 thousand metric tons.
    Keywords: Fisheries ; Exploratory fishing ; Jigging ; Fishery surveys ; Cephalopod fisheries ; Stock assessment ; Catch/effort ; South China Sea ; Philippines ; Sthenoteuthis oualaniensis
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 19-31
    Format: 13
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