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  • Fisheries  (261)
  • South China Sea  (43)
  • AERODYNAMICS
  • General Chemistry
  • LUNAR AND PLANETARY EXPLORATION
  • Bangkok, Thailand  (149)
  • Silver Spring, MD  (128)
  • 1
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    Round scad exploration by purse seine in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26259 | 2002 | 2019-03-01 05:56:06 | 26259 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2022-08-02
    Description: Round scad exploration by purse seine in the waters of western Philippines was conducted from April 22 to May 7, 1998 for a period of five (5) fishing days with a total catch of 7.3 tons and an average of 1.5 tons per setting. Dominant species caught were Decapterus spp. having 70.09% of the total catch, followed by Selar spp. at 12.66% and Rastrelliger spp. 10.70%. Among the Decapterus spp. caught, D. macrosoma attained the highest total catch composition by species having 68.81% followed by D. kurroides and D.russelli with 0.31% and 1.14% respectively. The round scad fishery stock was composed mainly of juvenile fish (less than 13 cm) and Age group II (13 cm to 14 cm). Few large round scad at Age group IV and V (20 cm to 28 cm) stayed at the fishery. Other fishes caught were: Auxis rochei (0.85%), A. thazard (0.12%), Caranx spp. (0.45%), Emmilichthys nitidus (0.58%), Euthynnus affinis (0.42%), Leiognathus ruconius (0.58%), Loligo sp. (0.31%), Megalaspis cordyla (0.09%), Rastrelliger spp. (10.70%), Sardinella longiceps (0.03%), Scomberoides lysan (0.24%), Selar spp. (12.66%), Sphyraena spp. (0.90%), Thunnus albacares (0.96%) and others (1.02%). Tuna and tuna like fishes such as yellowfin tuna, eastern little tuna, bullet tuna, frigate tuna and oceanic squid are distributed in the upper latitudes of the survey area. On the other hand, round scads, big-eyed scads and Indian mackerels are dominantly present in the lower latitudes of the survey area.
    Keywords: Fisheries ; Exploratory fishing ; Purse seining ; Age composition ; Catch composition ; Fishery surveys ; Carangid fisheries ; South China Sea ; Philippines ; Rastrelliger ; Decapterus
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 49-64
    Format: 16
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  • 2
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    Tuna resource exploration with longline in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26258 | 2002 | 2019-03-01 06:00:19 | 26258 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2022-08-02
    Description: An exploratory tuna longline fishing survey was conducted using the research and training vessels of the Southeast Asian Fisheries Development Center, the 1,178 GT MV SEAFDEC and the Bureau of Fisheries and Aquatic Resources, the 165 GT MV MAYA-MAYA in the South China Sea Waters, West of the Philippines from April to May, 1998. A total of 3,796 hooks was set in sixteen (16) fishing stations. There were no tuna caught during the entire survey but only minor and irrelevant species like the Pacific lancetfish, sharks and an opah species, Lampris guttatus. The important fishing and oceanographic factors during the survey and other research results on longline are described and analyzed. Additional longline studies within and near the Philippines territorial waters are also presented to substantiate the research results of the joint SEAFDEC/BFAR resource exploratory.
    Keywords: Fisheries ; Exploratory fishing ; Catch composition ; Fishery surveys ; Longlining ; Tuna fisheries ; South China Sea ; Philippines
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 39-48
    Format: 10
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  • 3
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    Fisheries statistics in Brunei Darussalam (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26890 | 23782 | 2019-11-14 01:01:29 | 26890 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2022-08-02
    Description: Fishery statistics in Brunei Darussalam have been collected by the Department of Fisheries since the 1940s. In the early 1980s, a number of statistics were collected, such as catch and effort data of artisanal fishermen, aquaculture statistics, processing statistics as well as data from major wet markets focusing on the amount, prices of marketed fish either from the local fishermen or imported. In 1984, the collection of statistics on commercial fishing was started. The statistics have been used in the formulation of fishery management and development policies as well as for sectoral development. Following a brief account of the responsibility and statistic collections of the Department of Fisheries, an examination is made of employment in the fishery sector, fisheries production, fish marketed and the GDP for the fishery industry. Fisheries in Brunei Darussalam is a very healthy industry, where production is well below the maximum allowable harvestable limit of 20,000 tons at 30%. The Department is embarking to increase production from the capture fishery to reduce the country's dependence on imported fish; the same applies for aquaculture, in order to complement production from the capture fisheries. The processing sector is also increasing in importance, especially with the increase in the number of capture fishery licenses, and the demand for quality and value-added products.
    Keywords: Fisheries ; Marine fisheries ; Fishery statistics ; Aquaculture development ; Aquaculture statistics ; Fish catch statistics ; Marine aquaculture ; Freshwater aquaculture ; Fishery development ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 6-14
    Format: 9
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  • 4
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    Systematics and distribution of oceanic cephalopods in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26261 | 2002 | 2019-03-01 05:44:08 | 26261 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-09-24
    Description: Four species of cephalopods were collected in the South China Sea, area III (Western Philippines) during April-May 1998. An oceanic species, Sthenoteuthis oualaniensis (Lesson, 1830) was caught by automatic squid jigging on board M.V SEAFDEC and three additional cephalopod species, Sepioteuthis lessoniana Lesson, 1830, Thysanoteuthis rhombus Troschel, 1857 and Nototodarus hawaiiensis (Berry, 1912) were caught by squid jigging and purse seine of M.V. Maya Maya. S. oualaniensis was the dominant oceanic species in the study area. Descriptions, measurements and distributions of these squids were included.
    Keywords: Fisheries ; Purse seining ; Jigging ; Fishery surveys ; Cephalopod fisheries ; Commercial species ; South China Sea ; Philippines ; Sthenoteuthis oualaniensis ; Thysanoteuthis rhombus ; Sepioteuthis lessoniana ; Nototodarus hawaiiensis
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 76-100
    Format: 25
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  • 5
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    Species composition, abundance and distribution of phytoplankton in the thermocline layer in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26268 | 2002 | 2019-02-22 07:03:16 | 26268 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-09-24
    Description: Phytoplankton density, taxonomic composition and distribution in the thermocline layer were investigated to compare with those in the surface layer of 31 stations in the western Philippines during 17 April – 9 May 1998. The samples were collected from surface, thermocline depth (the beginning of thermocline), and chlorophyll maximum depth. In this study, thermocline depth and chlorophyll maximum depth were included in the thermocline layer. Three hundred and thirty-eight taxa, composed of 2 species of blue green alga, 144 species of diatoms and 168 species of dinoflagellates were identified. The occurrence of the species in each sampling depth were recorded. Phytoplankton densities at chlorophyll maximum depth were mostly highest among the sampling depths observed. The most abundance was 20,683 cells/l found at thermocline depth of station 24 due to the blooms of many diatom species. Oscillatoria (Trichodesmium) erythraea and Chaetoceros lorenzianus were dominant from surface through chlorophyll maximum depth. Seven species of diatoms presented as the dominant species only in the thermocline layer. The toxic dinoflagellates were found in low cell densities. Diversity and evenness indices of phytoplankton at chlorophyll maximum depth were high.
    Keywords: Fisheries ; Oceanography ; Dominant species ; Abundance ; Population density ; Phytoplankton ; Thermocline ; South China Sea ; Philippines ; Dinoflagellata ; Bacillariophyceae
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 197-216
    Format: 20
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  • 6
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    Subthermocline chlorophyll maxima in the South China Sea, Area III (Western Philippines) (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26269 | 2002 | 2019-02-22 03:41:31 | 26269 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-09-24
    Description: The subsurface chlorophyll maxima from 31 sampling stations in the South China Sea off Western Philippines were investigated. The extremely low concentration of chlorophyll ranged 0.001-0.104 µg/l were observed. These values were thought to be a result of serious problem of samples storage for too long at -20°C. Shipboard analysis or improved storage strategy should be considered.
    Keywords: Oceanography ; Chlorophylls ; Phytoplankton ; Biological sampling ; South China Sea ; Philippines
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 217-219
    Format: 3
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  • 7
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    Sub-thermocline chlorophyll maximum in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26387 | 23782 | 2019-04-05 08:46:20 | 26387 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-09-24
    Description: Shipboard measurement of chlorophyll a and b by HPLC system were carried out on the M.V. SEAFDEC Cruise No. 57/3-1999 from 21 April to 5 June 1999, in the South China Sea, Vietnamese waters. Chlorophyll a and b in surface water (2 m), seasonal thermocline below the mixed layer, chlorophyll maximum depth and sub-chlorophyll maximum depth from 58 stations in the studied area were investigated. Chlorophyll maximum depth ranged 7-90m and the concentration of chlorophyll a and b in this layer were 0.07-1.75 mg/m3 and 0.003-0.31 mg/m3 respectively. High concentration of chlorophyll a and b were observed in nearshore water which may reflected the effect of runoff from the coastal cities and lower Mekong delta. Observed chlorophyll concentrations in this area agreed well with other values reported for tropical seas.
    Keywords: Oceanography ; Chlorophylls ; Salinity ; Water temperature ; Thermocline ; Primary production ; Dissolved oxygen ; pH ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 251-264
    Format: 14
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  • 8
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    Species composition, abundance and distribution of phytoplankton in the thermocline layer in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26389 | 23782 | 2019-04-08 06:20:34 | 26389 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-09-24
    Description: One hundred and eighty-five samples of phytoplankton were collected from 58 stations in the Vietnamese waters during 30 April – 29 May 1999 to investigated species composition, abundance and distribution in the thermocline layer compared with those in the surface layer. The samples were taken from surface, thermocline depth and chlorophyll maximum depth. In this study, thermocline depth and chlorophyll maximum depth were included in the thermocline layer. Three hundred and fifty- seven taxa, composed of 2 species of blue green alga, 159 species of diatoms and 161 species of dinoflagellates, were identified. The occurrence of species in each layer was recorded. The cell densities at chlorophyll maximum depth were highest among the sampling depths observed in most stations of the survey. Data obtained from the samples collected from surface to 150 m with 25 m interval to study vertical distribution indicates that maximum cell density of the water column presented between 60 – 110 m. The most abundance was 179,386 cells/l found at chlorophyll maximum depth near the Ca Mau Cape due to the bloom of many diatom species. Oscillatoria ( Trichodesmium ) erythraea, Proboscia alata, Pseudosolenia calcar-avis and Thalassionema frauenfeldii were dominant at all sampling depths. Five species of diatoms presented as dominant species only in the thermocline layer. Alexandrium was frequently found at surface through chlorophyll maximum depth in the south. Diversity and evenness indices of all sampling depths were high in the Gulf of Tonkin and decreased through the south of Vietnam. These indices were high in the thermocline layer.
    Keywords: Oceanography ; Geographical distribution ; Community composition ; Abundance ; Check lists ; Phytoplankton ; Thermocline ; Algae ; Pseudosolenia calcar-avis ; Alexandrium ; Thalassionema frauenfeldii ; Proboscia alata ; Oscillatoria erythraea ; Oscillatoria ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 292-309
    Format: 18
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  • 9
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    The systematics and distribution of oceanic cephalopods in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26383 | 23782 | 2019-04-05 06:54:11 | 26383 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-09-24
    Description: Oceanic cephalopod exploration was conducted by M.V. SEAFDEC in Vietnamese waters during 21 April- 5 June 1999, as part of SEAFDEC’s collaborative research survey on the fisheries resources of the South China Sea Area IV (Vietnamese waters) with focus on tuna, oceanic squid and other highly migratory species. Squid fishing activities were conducted in 10 stations, ranging in the depth from 600-4000 m, using four automatic jigging machines at night. The purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1830) was the only species caught throughout the fishing area. Diagnosis and distribution of the species in the study area are reported.
    Keywords: Biology ; Fisheries ; Animal morphology ; Community composition ; Geographical distribution ; Marine molluscs ; Taxonomy ; Sthenoteuthis oualaniensis ; Cephalopoda ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 169-180
    Format: 12
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  • 10
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    The primary productivity in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26271 | 2002 | 2019-02-21 02:15:25 | 26271 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: In this paper the relative concentrations and vertical distributions of primary production were investigated off Western Philippines of the South China Sea during tradewinds from April 15 to May 11, 1998. Primary productivity measurements were conducted using conventional "light-and-dark bottle" oxygen method. The net primary production estimates at ten (10) different stations established between 19° 59.2'N, 119° 58.7'E and 11° 13.5'N, 118° 03.1'E ranged from 0.10 ~ 1.53 g C m-2 d1. The result suggests that the present net production estimates in the area is remarkably higher than the estimates from other parts of the South China Sea (viz., northern coastal waters off Taiwan and southwestern parts of the SCS which included marine waters of Thailand, Indonesia and Malaysia). The highest primary production occurred at the upper 60-m well-mixed layer of station 1 in the northwestern most part of the area. Results have shown that some other hydrographic and chemical parameters (viz., temperature, salinity, light and fluorescence) greatly complicate and may not coherent with the analyses of relative distribution and abundance of primary production in the area.
    Keywords: Fisheries ; Oceanography ; Phytoplankton ; Primary production ; South China Sea ; Philippines
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 235-250
    Format: 16
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