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  • 1
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    Long nonlinear internal waves (2006)
    Annual Reviews
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Annual Reviews, 2006. This article is posted here by permission of Annual Reviews for personal use, not for redistribution. The definitive version was published in Annual Review of Fluid Mechanics 38 (2006): 395-425, doi:10.1146/annurev.fluid.38.050304.092129.
    Description: Over the past four decades, the combination of in situ and remote sensing observations has demonstrated that long nonlinear internal solitary-like waves are ubiquitous features of coastal oceans. The following provides an overview of the properties of steady internal solitary waves and the transient processes of wave generation and evolution, primarily from the point of view of weakly nonlinear theory, of which the Korteweg-de Vries equation is the most frequently used example. However, the oceanographically important processes of wave instability and breaking, generally inaccessible with these models, are also discussed. Furthermore, observations often show strongly nonlinear waves whose properties can only be explained with fully nonlinear models.
    Description: KRH acknowledges support from NSF and ONR and an Independent Study Award from the Woods Hole Oceanographic Institution. WKM acknowledges support from NSF and ONR, which has made his work in this area possible, in close collaboration with former graduate students at Scripps Institution of Oceanography and MIT.
    Keywords: Solitary waves ; Nonlinear waves ; Stratified flow ; Physical Oceanography
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 2
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    Design and function of superfast muscles : new insights into the physiology of skeletal muscle (2005)
    Annual Reviews
    Details
    Publication Date: 2022-05-25
    Description: First published online as a Review in Advance on October 24, 2005. (Some corrections may occur before final publication online and in print)
    Description: Author Posting. © Annual Reviews, 2005. This article is posted here by permission of Annual Reviews for personal use, not for redistribution. The definitive version was published in Annual Review of Physiology 68 (2006): 22.1-22.29, doi:10.1146/annurev.physiol.68.040104.105418.
    Description: Superfast muscles of vertebrates power sound production. The fastest, the swimbladder muscle of toadfish, generates mechanical power at frequencies in excess of 200 Hz. To operate at these frequencies, the speed of relaxation has had to increase approximately 50-fold. This increase is accomplished by modifications of three kinetic traits: (a) a fast calcium transient due to extremely high concentration of sarcoplasmic reticulum (SR)-Ca2+ pumps and parvalbumin, (b) fast off-rate of Ca2+ from troponin C due to an alteration in troponin, and (c) fast cross-bridge detachment rate constant (g, 50 times faster than that in rabbit fast-twitch muscle) due to an alteration in myosin. Although these three modifications permit swimbladder muscle to generate mechanical work at high frequencies (where locomotor muscles cannot), it comes with a cost: The high g causes a large reduction in attached force-generating cross-bridges, making the swimbladder incapable of powering low-frequency locomotory movements. Hence the locomotory and sound-producing muscles have mutually exclusive designs.
    Description: This work was made possible by support from NIH grants AR38404 and AR46125 as well as the University of Pennsylvania Research Foundation.
    Keywords: Parvalbumin ; Ca2+ release ; Ca2+ uptake ; Cross-bridges ; Adaptation ; Sound production ; Whitman Center
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 3
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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
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    Format: 235-250
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  • 4
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    Catch of experimental longline, purse seine and handline in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26260 | 2002 | 2019-03-01 05:49:00 | 26260 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: This paper presents the tuna longline fishing operation conducted in western Philippine waters as well as the port sampling conducted in Zambales. The longline fishing operation was not successful in catching tuna but caught the deep swimming species such as sharks, lancet fish and opah. The undefined and shallow thermocline might have contributed to the unsuccessful fishing operations. Another reason might be the spatial distribution of tunas brought about by the El Niño event, which causes the spreading of the warm water mass from the western Pacific Ocean to the eastern Pacific Ocean allowing the yellowfin tunas to have a wider space to move. Yellowfin tuna stock in the western Philippine waters belongs to the juvenile and subadult population while the skipjack tunas belong to the adult population as most of the catch observed during port sampling were mature. The juvenile and sub-adult stages of yellowfin tunas were not the proper size for the longline fishery, which may explain in part why no tuna was caught during the research cruise. These sizes are available principally to the purse seine fishery as observed in the port sampling survey.
    Keywords: Fisheries ; Handlining ; Purse seining ; Catch composition ; Fishery surveys ; Experimental fishing ; Longlining ; Tuna fisheries ; South China Sea ; Philippines ; Thunnus albacares ; Euthynnus pelamis
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    Format: 65-75
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  • 5
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    Analysis and pre-estimation of nutrients in Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26390 | 23782 | 2019-04-08 06:24:56 | 26390 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The distribution of nutrients (Silica, Phosphate, Ammonium, Nitrate, Nitrite and Sulfate) in the Vietnamese waters was studied in the SEAFDEC Interdepartmental Collaborative Research Survey: Area IV. The samples were collected by M.V. SEAFDEC on the 30 April to 29 May 1999 (post monsoon period). Fifty-eight stations (2m from surface and 100 m from surface) were established in this study. The average of Silica at the surface layer is 25.96μM and at the bottom layer is 30.69μM. The average of Phosphate at the surface layer is 0.890 μM and at the bottom layer is 1.353μM. The average of Ammonium at the surface layer is 2.805μM and at the bottom layer is 2.538μM. The average of Nitrate at the surface layer is 5.593μM and at the bottom layer is 6.810μM. The average of Nitrite at the surface layer is 0.169μM and at the bottom layer is 0.197µM. The average of Sulfate at the surface layer is 26.903 μM and at the bottom layer is 27.831μM. The results indicated that the concentrations of Silica, Phosphate, Nitrate, Nitrite and Sulfate in deep water were higher in the surface water, but the Ammonium is inverse.
    Keywords: Oceanography ; Research ; Phosphates ; Silica ; Nitrites ; Nitrates ; Marine environment ; Ammonia ; Nutrients (mineral) ; Sulphates ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
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    Format: 310-345
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  • 6
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    Studies on phytoplankton pigments: chlorophyll, total carotenoids and degradation products in Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26386 | 23782 | 2019-04-05 08:35:51 | 26386 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Distribution of phytoplankton pigments was investigated in the relation to Chlorophyll a (Chl-a) and light intensity in Vietnamese waters located at longitude 102E - 112W, latitute 23N - 7N. Over 200 samples collected at 58 stations were analyzed for pigments (Chlorophyll a, b, c and carotenoids) and degradation products (Phaeophytill). Chlorophyll a was measured by fluorescence. Results show that average values in the seawater were 0.18 ± 0.04 mg.m-3 for Chl-a; 0.05 ± 0.01 mg.m-3 for Chl-b; 0.062 mg.m-3 for Phaeophytill. Higher value of Chl-a occurred at the thermocline but maxima were found at 75 or 50m depths. Average value of Carotenoids concentration was very low about 0.052 ± 0.12 mg.m-3. The report used a model for the relationship between Chlorophyll a content and light intensity to estimate the primary production. Average value of primary production was about 9.04 mgC.m3.day-1 at the surface and 2.63 mgC.m3.day-1 at the bottom. The relationship between Chlorophyll and some environmental parameters such as temperature, salinity was examined. The effects of thermocline and halocline to the primary production were analyzed.
    Keywords: Biology ; Oceanography ; Chlorophylls ; Photosynthetic pigments ; Phytoplankton ; Primary production ; Carotenoids ; Vertical profiles ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
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    Format: 233-250
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  • 7
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    Geotrophic and drift current in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26393 | 23782 | 2019-04-08 06:53:08 | 26393 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The water circulation in area IV was calculated by 2 methods. The circulation for the area where water depth exceeded 600m was calculated by the geostrophic balance method. In shallow water area effect of wind absolutely surpasses geostrophic balance, so wind induced drift current is greater than geostrophic current many times. So, for the whole area (shallow deep) the drift current was calculated by two-dimensional nonlinear shallow water equation based on typical monsoon fields. The results of 2 methods showed common picture of the circulation with divergence and convergence changing by season.
    Keywords: Oceanography ; Ocean currents ; Scientific research ; Geostrophic flow ; Geostrophic method ; Water circulation ; Wind-driven currents ; Viet Nam ; South China Sea
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    Format: 365-373
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  • 8
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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
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    Format: 77-93
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  • 9
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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
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    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
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    Format: 94-145
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  • 10
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    Distribution, abundance and species composition of phytoplankton in the Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26388 | 23782 | 2019-04-08 06:15:45 | 26388 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Samples of phytoplankton were collected from 58 stations in the Vietnamese waters from 30 April to 21 - May, 1999 on boat M. V. SEAFDEC. The total of 508 taxa, which consisted of 1 genus, 3 species of Cyanophyta; 1 genus, 2 species of Silicoflagellata; 63 genera, 283 species of Bacillariophyta and 34 genera, 220 species of Pyrrophyta were identified. In the Cyanophyta, Oscillatoria (mainly O. erythraea) was the frequently dominant species. Bacteriastrum elongatum, Bellerochea malleus, Chaetoceros cintus, Thalassionema nitzschioides and Thalassiothrix frauenfeldii were dominant species only in some stations of the coastal region of area A, B and D. Average cell numbers of phytoplankton in the different parts of Vietnamese sea waters were in the range 5.984-53.570 cells/l. The indices of species diversity were in the ranges: - R: from 0.70 to 2.5- H´: from 2.49 to 2.32- H´max: from 6.67 to 6.80- J: from 0.37 to 0.48- Dv: from 1.21 to 2.07
    Keywords: Oceanography ; Dominant species ; Geographical distribution ; Community composition ; Abundance ; Species diversity ; Check lists ; Phytoplankton ; Bacillariophyta ; Thalassionema nitzschioides ; Oscillatoria erythraea ; Chaetoceros ; Cyanophyta ; Bellerochea ; Bacteriastrum elongatum ; Dinophyta ; Thalassiothrix frauenfeldii ; Silicoflagellata ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
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    Format: 265-291
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  • 11
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    Temperature, salinity, dissolved oxygen and water masses of Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26391 | 23782 | 2019-04-08 06:29:58 | 26391 | Southeast Asian Fisheries Development Center, Secretariat
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    Publication Date: 2021-07-24
    Description: During April and May 1999, An MV SEAFDEC cruise was carried out in Vietnamese waters for the SEAFDEC Interdepartmental Collaborative Research Program on Marine Fishery Resources. Data on temperature, salinity and dissolved oxygen concentration of water in the area were collected using the Integrated CTD instrument. The survey period was in April to May which is the transition period between the Northeast monsoon to the Southwest monsoon, the feature from the study seem to mix under the influence of both monsoon seasons. The Northern part of the survey was still under the influence of the Northeast Monsoon as shown by the lower temperatures and higher salinity water of water along the coast from Da Nang to Nha Trang than those off shore. In the southern part of the area, the Southwest monsoon started to prevail as shown by the occurrence of weak upwelling off the Nha Trang coast, the shallow mix layer and the covering of mixed layer of the outer Gulf of Thailand station by the Thailand Gulf mixed layer water. The runoff from the Red and the Mekong River also plays an important role in the characteristics of the water in the study area, as shown from the distribution of low salinity and low oxygen off coast near the river. There was an intrusion of subsurface water (10-15 m) from off the Mekong River station to the subsurface water of station no.56 and 57 in the outer Gulf of Thailand. Temperatures between 29.5-30°C and salinity of about 33.2-33.5 PSU characterize the water. Six water masses, Continental shelf water, Open sea water, Maximum salinity water, Seasonal thermocline water, Permanent thermocline water and Deep water, were found during the survey period.
    Keywords: Oceanography ; Water masses ; Scientific research ; Salinity ; Hydrography ; Temperature ; Thermocline ; Dissolved oxygen ; Viet Nam ; South China Sea
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    Format: 346-355
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  • 12
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    Sedimentological characteristic of bottom sediment of Vietnamese coastline (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26395 | 23782 | 2019-04-08 07:26:38 | 26395 | Southeast Asian Fisheries Development Center, Secretariat
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    Publication Date: 2021-07-24
    Description: During survey of SEAFDEC vessel in May, 1999, 39 samples of bottom sediments of Vietnamese coastline were collected. The samples were analyzed for their sedimentological, micropaleontological characteristics as well as for their total organic matter and mineralogical composition of sediments. The study area can be divided into three parts: northern, central and southern part. Northern and southern parts are characterized by a wide, shallow continental shelf, while central part has very narrow continental shelf. Generally, in the southern part sand is more spread, especially in the front of the Maekong river mouth (25.64% of total sediments), sediments is coarser than in others (average mean size is 0.162mm), better sorted, less skewed. In the northern part, clayish silts, clayish, sandy silts are most spread, sediments are poor sorted, moderate skewed. Average mean size is 0.088mm. In the central part, clayish, silty sand is dominant. Average mean size is 0.1507mm. Sediments are poor sorted. Result of study revealed an occurrence of 98 foraminifers species in the bottom sediments, 19 of them are plankton and 79 are benthos. A content of total organic matter in the study area varies from 0.125% to 1.344%. High content of TOM is observed in the central part, as well as in the south western part. A study on mineralogical composition has pointed out a presence of 35 minerals in bottom sediment.
    Keywords: Oceanography ; Micropalaeontology ; Organic matter ; Sediment texture ; Grain size ; Mineral composition ; Ocean floor ; Sediments ; Sediment analysis ; Foraminifera ; Viet Nam ; South China Sea
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    Format: 409-421
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  • 13
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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
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    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
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  • 14
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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
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    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
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  • 15
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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
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  • 16
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    Distribution of planktonic malacostraca and cephalopod paralarvae in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26267 | 2002 | 2019-02-22 07:07:16 | 26267 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Zooplankton samples from 31 stations in the western Philippines water were collected by M.V. SEAFDEC on 7 April - 19 May 1998. Six major groups were identified: Euphausiacea, Natantia (Penaeidea and Caridea), Reptantia, Brachyura, Stomatopoda and cephalopod paralarvae. Three genera of Euphausiacea were found, they belong to one family: this group formed 25.1% - 90.9% of total taxonomic groups at different stations. The superfamiiy Penaeidea consisted of seven genera belong to four families. Caridea larvae were composed of 11 families including 19 genera. Retantia consisted of three infraorder: Stenopodidea, Thalassinidea and Parinuridea. The infraorder Parinuridea comprised two families: Palinulidae and Scyllaridae. Fourteen families of Brachyura larvae occurred in the study area. Stomatopoda was composed of three families including three genera. Cephalopoda paralarvae were presented in the plankton samples by six families representing eight genera. The maximum counts for malacostraca larvae and cephalopod paralarvae was observed at station 16. The present study reveals that some economic species such as Penaeus spp., Parapenaeus spp., Panulirus spp., Scyllarus spp., Portunus spp. and Sthenoteuthis oualaniensis were important components of the zooplankton assemblages in the western Philippines.
    Keywords: Fisheries ; Oceanography ; Plankton surveys ; Zooplankton ; Molluscan larvae ; Biological sampling ; Crustacean larvae ; South China Sea ; Philippines ; Malacostraca ; Cephalopoda
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 177-196
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  • 17
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    Dissolved nutrients in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26272 | 2002 | 2019-02-21 01:55:17 | 26272 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: This paper discusses the distribution of dissolved nutrients and the hydrology of the first 100 m depth of Western Philippines, South China Sea (SCS). The object of the study was to understand variations in the distribution of these parameters by comparing the results of the April-May 1998 survey to previous studies made in the SCS and the Pacific side of Philippine waters. Water samples at different sampling depths (surface, 20, 40, 60, 80 and 100 m) were collected from 31 oceanic stations, from 11°-20°N and 117°-121°E. Results of this study confirmed that the chemical and hydrological profiles in SCS were similar but the range of values obtained for different parameters were dependent on the seasonal and spatial variations. The higher average temperature observed relative to the previous summer data may be attributed to the El Nino phenomenon. The mixed layer was deeper compared to the NE monsoon data. Conversely, western and eastern Luzon waters demonstrated differences in hydrological profile, except for the surface temperature, which was almost similar to the 1967-68 Pacific waters summer data. Among the nutrients investigated, phosphate and nitrate demonstrated a direct relationship with temperature, salinity and dissolved oxygen, from the surface down to 100 m depth. The behavior of phosphate and nitrate can be evaluated in terms of their hydrological structure in contrast to the more reactive silicate and nitrite ions.
    Keywords: Oceanography ; Dissolved inorganic matter ; Hydrographic data ; Nutrients (mineral) ; South China Sea ; Philippines
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 251-273
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  • 18
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    Abundance and distribution of zooplankton in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26266 | 2002 | 2019-02-22 07:10:51 | 26266 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A survey on the zooplankton in the waters of western Philippines was carried out from April 18 to May 9, 1998. The estimate of zooplankton biomass ranged from 0.92 mg/m3 to 20.85 mg/m3 with a mean of 5.70 mg/m3. Maximum and minimum densities of zooplankton recorded were 4683/m3 in station 16 and 446/m3 in station 5, respectively. The zooplankton communities were comprised of 37 different categories of animal groups. Copepods were the most dominant group in zooplankton communities at all stations but their abundance varied from 5% to 43% of the total zooplankton.
    Keywords: Fisheries ; Oceanography ; Plankton surveys ; Zooplankton ; Population density ; Biomass ; South China Sea ; Philippines ; Copepoda
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 164-176
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  • 19
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    Petroleum hydrocarbon contamination in seawater along the Western Coast of the Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26276 | 2002 | 2019-02-21 01:10:25 | 26276 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A study on petroleum hydrocarbon concentrations in seawater from the South China Sea off the western coast of the Philippines was conducted during April to May 1998. The concentrations of dissolved/dispersed petroleum hydrocarbons (DDPH) in seawater samples were measured at 31 stations, using Ultraviolet Fluorescence (UVF) Spectroscopy technique. The DDPH concentrations were found to be in the range of 0.02 - 1.47 µg/l as chrysene equivalent, with an average of 0.25 µg/l. An attempt was made to compare between petroleum hydrocarbons in seawater samples from the near-shore area (8 stations) and the offshore area (23 stations). It was found that the DDPH concentrations of the near-shore stations were in the range of 0.03 - 0.47 µg/l, with an average of 0.12 µg/l, whereas the DDPH concentrations of the offshore stations were in the range of 0.02- 1.47 µg/l, with an average of 0.29 µg/l. However, the student’s t-test of the two data groups indicated that the two means were not significantly different at a = 0.05.
    Keywords: Environment ; Pollution ; Pollution monitoring ; Marine pollution ; Coastal waters ; Petroleum hydrocarbons ; South China Sea ; Philippines
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 316-320
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  • 20
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    Diamondback squid (Tysanoteuthis rhombus) exploration in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26257 | 2002 | 2019-03-01 06:03:04 | 26257 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The diamondback squid (Tysanoteuthis rhombus) is a potential resource popularized mainly for the export market in the Central Philippines and the positive results from other experimental activities. Exploratory fishing for the species using the giant squid jig was conducted on board MV SEAFDEC and MV Maya-Maya in the South China Sea (Western Philippines) to determine its occurrence, abundance and distribution in these areas. The gear employed is basically used in small boats hence, its operation on bigger vessels was very difficult. The result was discouraging with only one diamondback squid caught out of the 175 jigs set. The description and fishing operations of the gear are presented with comparison from other research and fishing results conducted in Camotes Sea, Calauag Bay, and Ormoc Bay which are considered potential areas.
    Keywords: Fisheries ; Biological surveys ; Exploratory fishing ; Jigging ; Gear research ; Fishery surveys ; Cephalopod fisheries ; South China Sea ; Philippines ; Tysanoteuthis rhombus
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 32-38
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  • 21
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    Visual observation on fishes schooling and fishing activities in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26255 | 2002 | 2019-03-01 06:28:01 | 26255 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Many schools of small bonito were observed at latitude 18°-19° N, longitude 118°-119° E, school of pompano dolphinfish Corphaena equiselis (Linnaeus, 1758) was also found and sampling during lured by light at night. Surface schooling of yellowfin tuna Thunnus albacares Bonnaterre, 1788) skipjack, Katsuwonus pelamis (Linnaeus, 1758) were found at latitude 14°-15° N and longitude 117°-118° E. Many fish schools were observed through acoustic equipment, Furuno FQ-70 at near shore of Zambales and off shore at latitude 13°-14° N, longitude 117°-118° E, in the deep layer of 100-250 meters depth. Oceanic squid has widely distribution over the area. Fishing activities are target on those resources. Tuna longline fishing operation was observed at latitude 16°-17° N and longitude 116°-117°E about 150 nautical miles away from shore. Payaws were set along the coastal line from northern Luzon until northern of Palawan and from near shore until 30-80 nautical miles away from coastline. Payaw in the central part were aimed for purse seine operation while the northern Payaw aimed to handline fishing. Handline fishing occupied all most near shore area from northern to the south. Squid fishing was observed many near San Fernando.
    Keywords: Fisheries ; Marine fisheries ; Purse seining ; Pelagic fisheries ; Schooling behaviour ; Tuna fisheries ; South China Sea ; Philippines ; Coryphaena equisetis ; Thunnus albacares ; Euthynnus pelamis
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 11-18
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  • 22
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    Biological feature of an oceanic squid, Sthenoteuthis oualaniensis in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26264 | 2002 | 2019-03-01 05:25:20 | 26264 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Several species of oceanic squids are believed to occur in the South China Sea, especially off the west coast of the Philippines. Sthenoteuthis oualaniensis was one of the species that dominated the catch during the research survey off western Philippines in April to May 1998. Preliminary study was carried out on some biological features of Sthenoteuthis oualaniensis, particularly on maturity pattern, sex ratio and stomach content. There was a similarity in maturity pattern throughout the study areas with the same proportion of mature and immature squids. In all stations, the female squids outnumbered the male and the size of the female was general bigger than the male squids. ML50% of female was estimated to be at 175 mm while range of mature female was between 110 - 240 mm. Fish and cephalopods were the most frequently occurring prey taxa found in the diet of Sthenoteuthis oualaniensis, contributing between 37% - 46% and 30% - 43% respectively. Identification of prey taxa especially to species level was strictly limited, due to lack of proper references and understanding of the nature of fish species composition within the study areas. Results discussed in this paper may serve as early information for future biological study on S. oualaniensis.
    Keywords: Biology ; Fisheries ; Sex ratio ; Sexual maturity ; Cephalopod fisheries ; Population structure ; Fishery biology ; South China Sea ; Philippines ; Sthenoteuthis oualaniensis
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 135-147
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  • 23
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    Phytoplankton in the surface layers of the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26270 | 2002 | 2019-02-22 03:38:03 | 26270 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Phytoplankton in the surface layers of South China Sea, Western Philippines were investigated for species composition, distribution and abundance. Thirty one stations were sampled during the cruise of M/V SEAFDEC to South China Sea along latitudes 8° to 20°N and longitudes 115° to 121°E from April 15 to May 11, 1998. In each station, water samples at the surface and at depths of 20, 40 and 60-m were collected by a 20-liters capacity Van-Dorn water sampler. Results of the phytoplankton analysis yielded a total of 56 taxa. These included 3 species of blue-green algae;1 genus of Chrysophytes;32 genera of diatoms and 20 genera of dinoflagellates. The phytoplankton assemblage was dominated by Bacillariophyceae or diatoms which accounted for 73% of the total standing stock. The top 5 most dominant representatives were Chaetoceros spp (962 cells/L); Bacteriastrum spp (587 cells/L); Rhizosolenia spp (349 cells/L); Thalassiothrix spp (314 cells/L) and Leptocylindrus danicus (162 cells/L). Chaetoceros spp occurred in almost all stations sampled. Dinoflagellates ranked second in terms of abundance (16%) although they were sporadic and in smaller densities. The top 5 most dominant representatives were Ceratium spp (249 cells/L); Podolampas spp (91 cells/L); Gonyaulax spp (63 cells/L); Dinophysis spp (55 cells/L) and Scrippsiella spp (46 cells/L). Blue-green algae or cyanophyceae accounted for 11% of the total standing crop and the most dominant species were Pelagothrix clevei (357 cells/L) and Trichodesmium thiebautii (153 cells/L). Less than 1% of the total standing crop is attributed to Chrysophytes represented by Dictyocha spp. Phytoplankton densities in the surface waters (0-m layer) was nominal compared to the other 3 strata/layers (20;40 and 60-m). Phytoplankton densities increased with depth. Abundant concentrations of phytoplankton coincided with the fluorescence maxima and maximum concentrations of nutrients. Trichodesmium thiebautii was dominant and formed patches in the surface and nearsurface waters along the coast of northern Luzon or near the entrance of Luzon Strait where low water temperatures were recorded and high concentrations of dissolved nutrients were noted, while Pelagothrix clevei was also observed to form patches at the surface and near-surface waters along the southern coast near the entrance of Sulu Sea where low water temperatures were recorded and high salinities and maximum concentrations of dissolved nutrients were observed. Abundant concentrations of diatoms composed mostly of several species of Chaetoceros; Bacteriastrum; Rhizosolenia; Thalassiotrix and Leptocylindrus were observed along and/or near the coastlines, while in stations offshore, minimal density was noted. Several species of dinoflagellates in low densities were observed in stations going offshore. The paper closes with a brief discussion of the general distribution pattern exhibited by the phytoplankton.
    Keywords: Oceanography ; Dominant species ; Plankton surveys ; Phytoplankton ; South China Sea ; Philippines ; Dinoflagellata ; Bacillariophyceae ; Cyanophyta
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 220-234
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  • 24
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    Composition, abundance and distribution of ichthyoplankton in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26265 | 2002 | 2019-02-22 07:16:03 | 26265 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Composition, abundance and distribution of ichthyoplankton were investigated in the South China Sea, western Philippines. Larval fish samples were collected at 31 stations by surface and double oblique tows in April/May 1998. A total of 7371.67 fish larvae, representing 85 families, were collected in the samples. Abundance of fish larvae were dominated by the Myctophidae followed by the Gonostomatidae. The ten most abundant families of fish larvae found in this study were separated into three broad categories: (1) inshore fishes, represented mainly by the Bregmacerotidae, Gobiidae, Apogonidae, and Carangidae;(2) mid zone fishes represented mainly by the Hemiramphidae, Labridae and Engraulidae;(3) offshore fishes represented mainly by the Myctophidae and Gonostomatidae. Depth and time of day appeared to affect the abundance of fish larvae and fish eggs. Fish larvae were found mainly in double oblique tows while fish eggs were found mostly in surface tows. The larvae caught at night were more abundant than larvae caught during the day. Abundance and distribution of tuna larvae are also discussed.
    Keywords: Fisheries ; Oceanography ; Ichthyoplankton ; Abundance ; Fish larvae ; South China Sea ; Philippines ; Gonostomatidae ; Myctophidae
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 148-163
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  • 25
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    Cruise report of MV.SEAFDEC No. 50-4/1998 of the Collaborative Research Survey in the South China Sea, Area III: Western Philippines, 7 April to 19 May 1998 (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26277 | 2002 | 2019-02-21 01:13:46 | 26277 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Details are given of the activities and findings of a cruise conducted by the MV SEAFDEC in western Philippine waters in order to survey the fishery resources in the area. Three major activities were conducted: an acoustic survey; an oceanographic survey; and, fish sampling. These activities were aimed to support data, information and also to provide specimens for 23 research projects in the collaborative research programme for the South China Sea, area III.
    Keywords: Fisheries ; Marine fisheries ; Fishery surveys ; Echo surveys ; Fishery resources ; South China Sea ; Philippines
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 325-329
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  • 26
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    Fish taxonomic studies in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26377 | 23782 | 2019-04-05 03:46:21 | 26377 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Work was undertaken on fish taxonomy of marine fish found in Vietnamese waters in order to revise the “Field guide to important commercial marine fishes of the South China Sea”. Two field surveys were carried out at 9 separate locations from April 23 to May 17, and 2 other locations from September 20-26, 1999. A total of 442 specimens of fish from 107 different families were collected and photographed. Among the 442 specimens, 336 specimens were successfully identified to the species level, 99 specimens to the genus level, and only 7 specimens to the family level. The sampling areas at Qui Nhon, Nha Trang and Phan Thiet provided the most number of samples of 96, 94 and 79 fish, respectively. A total of 348 fish were new candidates for the Field Guide. More field surveys are necessary to cover the rather extensive array of new fish specimens expected to be found in these waters.
    Keywords: Fisheries ; Marine fish ; Catch composition ; Ecological associations ; Check lists ; Taxonomy ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 41-54
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  • 27
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    Pelagic stock assessment by hydroacoustic method in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26374 | 23782 | 2019-04-04 03:30:40 | 26374 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A collaborative acoustic survey between the Research Institute of Marine Products (RIMP), Vietnam and the Marine Fishery Resources Development and Management Department (MFRDMD) of SEAFDEC, was carried out in Vietnam waters from April, 29 to May, 29 1999. Survey was conducted by using the scientific echo sounder, FQ70 installed on board of MV SEAFDEC. Survey transects were designed perpendicular to the coastline with standard length of 60 nautical miles. The vessel was cruised at 10 knot and stopped at each station for oceanographical sampling. During cruising, the back scattering strength, SV were collected and saved in multiple storage media. SV values were verified during data analyses by removing any noise and scattering layers. The back scattering values by area (SA) is calculated and the fish density by transects are produced. Using those parameters, the biomass of pelagic is estimated based on representative species from the sampling program and national fisheries statistics. Pelagic biomass in Vietnamese waters was estimated at 9.26 x 106 tonnes with the average density of 15.93 tonnes/km2. This estimation is based on dominance species of Decapterus maruadsi.
    Keywords: Fisheries ; Backscatter ; Pelagic fisheries ; Stock assessment ; Echo surveys ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 1-9
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  • 28
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    Ecological aspects of oceanic squid, Sthenoteuthis oualaniensis (Lesson) in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26262 | 2002 | 2019-03-01 05:39:50 | 26262 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: In an attempt to come up with initial jigging fishery on oceanic squid in the Southeast Asian Region SEAFDEC conducted a comparative study on the squid in the Philippines Exclusive Economic Zone off the coast of Western Philippines from 17 April to 9 May 1998. The survey objectives are to determine the distribution and abundance of the oceanic squid in relation to oceanographic conditions and to examine the feasibility of harvesting squid with jig gear. Results from 11 sampling stations show that only one species of the purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1930) were caught by automatic squid jigging gear. The distribution and abundance of the purpleback flying squid in term of the catch-per-unit effort (CPUE, number of squid per line hour) are presented. Over the entire survey area, the CPUE of the squid averaged 5.7 squids/line hour. Drop-off rates for jigs fished on the jigging machines ranged from 0 to 0.33 squid/line hour. Angling depth where the squid were abundant ranged from 50 m to 100 m. The squid had a mean overall mantle length of 147 mm and an average weight of 0.17 kg. A total of 2,592 squid were measured and mantle length ranged from 90 to 250 mm. Female dominated the catch, accounting for 1,380 squid or 81% of the 1,701 squid sexed. Males were generally smaller than females. The mantle length composition for males was single peak mode at between 120 and 130 mm. Females also had one peak between 140 and 150 mm mantle length. A similar length-weight relationship coefficients between male and female was found. The squid were found in a warm water mass where the sea temperature ranged from 14°C to 31°C at the depth from 150m up to sea surface at night. Good fishing grounds of the squid were at 18°N latitude (18.5 squids/line hour) and at 19°N latitude (11.6 squids/line hour) off the San Fernando and Currimao coasts, respectively where the upwelling occurred. Dissolved oxygen where squid abundant was ranged from 3.27 to 4.4 ml/l. Downwelling was found at 16°N along the 118°E where less potential of the squid, the water transparency depth in this area was deep of about 44 m. A period of 6 days before and after full moon day was good fishing day, while the percent illumination of the moon was less than 30%.
    Keywords: Fisheries ; Jigging ; Cephalopod fisheries ; Population structure ; Fishery oceanography ; Environmental conditions ; Fishery biology ; South China Sea ; Philippines ; Sthenoteuthis oualaniensis
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 101-117
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  • 29
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    Nanoplankton distribution and abundance in the South China Sea, Area III: Waters of Western (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26273 | 2002 | 2019-02-21 01:56:39 | 26273 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A collaborative cruise in the South China Sea in the waters of the South China Sea off the Western Philippines was conducted in the post-monsoon (April and May, 1998) periods on board MV SEAFDEC. The nanoplankton (including the smaller microplanktonic species) from 31 sampling stations consisted of more than 200 taxa comprising predominantly of nanodiatom (〉150 species), Prymnesiophyta (〉48 species), Dinoflagellata (〉30 species) and Prasinophyta (〉18 species). Among the minute plankton collected, three species of nanodiatom (Minidiscus comicus, M. chilensis, M. trioculatus) and numerous Prymnesiophyta species were present. The dominant pennate diatom comprised of Synedra parasitica, Fragilaria brevistriate, Diploneis crabro and Neodenticula sp., all of which were 〈20µm in size. The central diatom comprised of Cyclotella striata, C. meneghiniana and Stephenopyxis palmeriana. The genera of Synedra, Navicula, Fragilaria and Thalassiosira contained a wide range of species; however, majority of these species were new records and have not been taxonomically identified. The dominant Prymnesiophyta species (mostly small flagellate cells) comprised genera of Distephanus, Thalassomonas, Coccolithus, Protosphaera and Cryptochrysis; while those of dinoflagellate consisted of a wide range of species of genera Gyrodinium, Pyrodinium, Gonyaulax, Scrippsiella, Protoperidinium, Protoceratium, Ceratocorys and Alexandrium. The genera of Protoperidinium, Coccolithus, Minidiscus and Thalassiossira had a wide range of species. The class Heptophyceae comprising of the three families namely; Prymnesiaceae (Chrysochromulina sp.), Coccolithaceae (Oolithotus fragilis, Coccolithus pelagicus) and Gephyrocapsaceae (Emiliania huxlegi, Gephyrocapysa oceanica) had high cell densities (ranging from 1 x 10〈sup〉5〈/sup〉 L〈sup〉-1〈/sup〉 - 5 x 10〈sup〉5〈/sup〉 L〈sup〉-1〈/sup〉) especially in the nearshore waters. The total nanoplankton population (ranging from 3.1 x 10〈sup〉5〈/sup〉 to 2.47 x 10〈sup〉5〈/sup〉 L〈sup〉-1〈/sup〉) was dense in nearshore regions (especially around Subic and Manila bays) and tend to spread out in concentric semicircle into the open sea. The presence of the dinoflagellate species of Protoperidinium and Alexandrium were detected in considerable amounts at nearshore and midshore Philippines waters of the South China Sea. Blooms of Pyrodinim bahamense and Protoperidinium sp. (to a limited extend) occurred during the study period.
    Keywords: Oceanography ; Plankton surveys ; Abundance ; Biological sampling ; Nannoplankton ; South China Sea ; Philippines ; Prasinophyta ; Dinoflagellata ; Prymnesiophyta
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 274-290
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  • 30
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    Geostrophic and tidal currents in the South China Sea, Area III: West Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26275 | 2002 | 2019-02-21 01:16:31 | 26275 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The findings are presented of observations made during the SEAFDEC cruise conducted in western Philippines waters during the period mid April-mid May 1998 regarding the geostrophic and tidal currents. The dynamic high and low in the study area were owed to the relative vertical movement of water. The high area reflected a downward movement or downwelling in which as far as fisheries is concerned, is less potential for fisheries. The low dynamic surface due to cyclonic eddy caused by wind turbulence near the head of Luzon Island indicated a potential fishing ground for this season. Wind-dominated circulation with some orographic effects suggested that potential fishing grounds might be located for each season from wind data from coastal as well as ship stations.
    Keywords: Fisheries ; Oceanography ; Geostrophic flow ; Fishing grounds ; Fishery oceanography ; Current observations ; Tidal currents ; South China Sea ; Philippines
    Repository Name: AquaDocs
    Type: book_section
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    Format: 308-315
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  • 31
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    Characteristics of water in the South China Sea, Area III: Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26274 | 2002 | 2019-02-21 01:28:23 | 26274 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The characteristics of water in the South China Sea from latitude 11° N to 20°N and longitude 117°E to 121°E during 18 April to 8 May 1998 have been studied using Integrated CTD instruments onboard MV. SEAFDEC. It was found that there are six watermasses in the study area and there is upwelling off coast of northern Luzon Island at from the surface down to 200-meters. The water properties are influenced both by northeast and southwest monsoon winds as the duration of survey are during the transitional period, also by outflow from shore. The strong thermocline, halocline and pycnocline are present all over the area.
    Keywords: Oceanography ; Water masses ; CTD profilers ; Coastal upwelling ; Hydrographic data ; South China Sea ; Philippines
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 291-307
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  • 32
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    Proceedings of the Third Technical Seminar on Marine Fishery Resources Survey in the South China Sea, Area III: Western Philippines, 13-15 July 1999 (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26278 | 2002 | 2019-03-01 06:39:00 | 26278 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The Seminar presents an analysis of the results of the fisheries and oceanographic survey covering the waters of western Philippines, Area III, conducted during the period April-May 1998 by the M.V. SEAFDEC. A total of 23 papers are included in the following 4 sections: 1) Fisheries resources; 2) Fishery biology; 3) Primary production; and, 4) Fishery oceanography and marine pollution.
    Keywords: Fisheries ; Oceanography ; Pollution ; Marine fisheries ; Conferences ; Fishery surveys ; Fishery oceanography ; Fishery biology ; Fishery resources ; South China Sea ; Philippines
    Repository Name: AquaDocs
    Type: book
    Format: application/pdf
    Format: application/pdf
    Format: 336
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  • 33
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    Tuna resource exploration with tuna longline in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26376 | 23782 | 2019-04-05 03:42:53 | 26376 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The survey was designed to be carried out only in the central part of the whole area which was considered as deep sea or oceanic zone. Depth of water is mostly more than 1,000 m deep. The exploration area was covered from latitude 7°-30.0’ N to latitude 16°-00.0’ N and longitude 110°-00.0’ E to longitude 112°-30.1’ E covering around 72,000 square miles. Surface temperature varied from 27.4° C to 30.1° C, shallow thermocline layer is still the characteristic of South China Sea fishing ground. It was detached from 15-50 meters depth then water temperature decreased gradually until at the depth of 130-200 m with water temperature around 15.3° C. Three tuna were caught during the survey of M.V. SEAFDEC and many were caught on local fishing boat by both type of fishing gear tuna longline and drift gill net. They are mostly skipjack tuna Katsuwanus pelamis (Linnaeus, 1758) and yellowfin tuna Thunnus albacares (Bonnaterre, 1788) others catch were dolphinfish Coryphaena hippurus (Linnaeus 1758), wahoo Acanthocybium solandri (Cuvier, 1831), shortfin mako shark Isurus oxyrinchus (Rafinesque, 1809), Bigeye thresher shark Alopias superciliosus (Lowe, 1839), swordfish Xiphias gladius (Linnaeus, 1758), Bigtooth pomfret Brama orcini (Cuvier, 1831) and the most abundance was lancetfish Alepissaurus borealis (Gill, 1874). Tuna resource was found more abundance in the middle part of the survey area than the upper and lower. Their swimming layer was around 50 m to 90 m depth.
    Keywords: Fisheries ; Vertical distribution ; Catch composition ; Pelagic fisheries ; Fishery surveys ; Stock assessment ; Longlining ; Fishing grounds ; Thermocline ; Tuna fisheries ; Fishery resources ; Alopias superciliosus ; Coryphaena hippurus ; Xiphias gladius ; Thunnus albacares ; Acanthocybium solandri ; Isurus oxyrinchus ; Euthynnus pelamis ; Brama orcini ; Alepisaurus ferox ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 29-40
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  • 34
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    Study on biology of tuna in the South China Sea, Area IV; Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26382 | 23782 | 2019-04-05 06:49:51 | 26382 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Tuna and tuna-like species are recognized as the most promising target species in off-shore waters of Vietnam. The first studies on biology of tuna were conducted in 1960. To ensure the sustainable exploitation of tuna resources in off-shore waters, studies on biology of tuna are being carried out by the Research Institute of Marine Products. Materials on biology of tuna were collected on board of research and commercial vessels. Fishing gears were drift gillnets with different mesh-size and longline. The results of study showed that tuna and tuna-like species are distributed widely in both neritic and oceanic waters of Vietnam. The percentage of Skipjack tuna caught by gillnet in total catch was highest (25.3 %) then followed by Frigate mackerel (8.9) and Bullet tuna (3.4). Yellowfin and Bigeye tunas were dominant in catch by longline. Biological characteristics of four species of tuna like length frequency distribution, reproduction, feeding, growth and recruitment, mortality rate were described. The author proposed that the further studies on tuna would be conducted in collaboration among countries bordering the South China Sea.
    Keywords: Biology ; Fisheries ; Length-weight relationships ; Feeding ; Growth ; Potential resources ; Recruitment ; Reproduction ; Fishery development ; Tuna fisheries ; Scombroidei ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 146-168
    Format: 23
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  • 35
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    Analysis and estimation of trace metals in seawater and sediment in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26394 | 23782 | 2019-04-08 07:18:13 | 26394 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Water samples from off shore of Vietnam from latitude 6°N to 21°N and longitude 103°C to 112°E were collected on 30 April 1999 to 29 May 1999 and analyzed for copper (Cu), lead (Pb), cadmium (Cd), zinc (Zn), nickel (Ni), chromium (Cr), arsenic (As) and mercury (Hg). The concentration of metals Cu, Pb, Cd, Zn, Ni and Cr was measure using flameless atomic absorption spectroscopy. The total concentration of all eight metals was in concentration ranges of unpolluted coastal water. The results indicated that the concentration of metals in bottom layer higher than in surface layer. Also, trace metal contents in the surface sediment were studied in off shore of Vietnam during this cruise. Total metals content were measured. The range of concentration of metals were 10.3 - 71.0 mg.g-1 for Cu, 12.9 - 33.7 mg.g-1 for Pb, 1.29 - 18.72 mg.g-1 for Cd, 45.8 - 164.8 mg.g-1 for Zn, 21.2 - 93.6 mg.g-1 for Cr, 5.7 - 45.8 mg.g-1 for Ni, 1.64 - 3.80 mg.g-1 for As, and 0.104 - 0.493 mg.g-1 for Hg. The levels found in the present study are similar to data from other marine.
    Keywords: Oceanography ; Arsenic ; Chromium ; Heavy metals ; Nickel ; Copper ; Water analysis ; Sediments ; Water pollution ; Lead ; Trace elements ; Scientific research ; Sea water ; Zinc ; Mercury ; Cadmium ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 374-408
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  • 36
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    Multi species stock assessment by acoustic 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/26254 | 2002 | 2019-03-01 06:36:07 | 26254 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: An acoustic resource survey off western Philippines waters from April 18 to May 07, 1998 was conducted by MFRDMD in collaboration with BFAR by using M/V SEAFDEC. A scientific echosounder FQ-70 developed by the Furuno Electric Co. of Japan was used to collect the SV data along the transects of 60 nautical miles apart. The raw data of backscattering strength (SV) collected from the 200 kHz transducer were carefully corrected and filtered to eliminate the influence of noises such as planktons. The corrected SV values were used to estimate the biomass of multi-species pelagic fish. Decapterus macrosoma was selected as representative species based on catch composition caught by M/V MAYA-MAYA during fishing operations. From the catch, the standard length (SL) and average weight of Decapterus macrosoma were obtained. Then the target strength (TS) of the representative species was calculated using formula, TS=20log (SL) - 66. The distribution of the SV values showed geographical difference. SV values were higher in the northern area and the southern waters of Manila. TS was estimated at -45.8 dB with the standard length of 10.2 cm. The estimated density and biomass of multispecies pelagics along the coastal waters were 18.9 tonnes/km2 and 1.672 million tonnes respectively. Meanwhile the total area and depth layer used were 88,362 km2 and 190 m respectively.
    Keywords: Fisheries ; Marine fisheries ; Stock assessment ; Echo surveys ; Multispecies fisheries ; Target strength ; South China Sea ; Philippines ; Decapterus macrosoma
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 1-10
    Format: 10
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  • 37
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    Age and growth studies of oceanic squid, Sthenoteuthis oualaniensis using statoliths in the South China Sea, Area III, Western Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26263 | 2002 | 2019-03-01 06:30:16 | 26263 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Studies on age and growth using statolith of oceanic squids, Sthenoteuthis oualaniensis collected from Western Philippines, South China Sea, Area III have been conducted from 7 April - 19 May, 1998 by MV SEAFDEC Cruise No. 50-4/1998. A total of 1,707 squids were sampled and measured onboard. 74 statoliths which consist of 53 statoliths from female specimens and 21 from male specimens were extracted and processed using statolith ageing techniques with the body mantle length range from 107 - 217 mm and 115 - 167 mm, respectively. The male is small than the female where the male does not exceed 180 mm and the female can grow up to 260 mm. There is slightly a different dimension of growth at the statolith microstructure between the male and female specimens. In the ground statolith, growth increments were examined and grouped into four growth zones distinguished mainly by the width of the increments. It was found that the male exhibit slower growth and maturation occur at the same time with the female but at smaller size. The age of the male and female ranged from 135 - 259 days and 95 - 275 days, respectively. The life span of the species was considered within one year. It was also observed that the putative microcohort of the female could be explained from the length frequency distribution of the immature and mature female and a pool data of length frequency distribution from all stations.
    Keywords: Biology ; Fisheries ; Growth ; Age ; Cephalopod fisheries ; Population structure ; Balance organs ; Fishery biology ; Size distribution ; South China Sea ; Philippines ; Sthenoteuthis oualaniensis
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 118-134
    Format: 17
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  • 38
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    Exploration of oceanic squid, Sthenoteuthis oualaniensis resources in the South China Sea, Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26384 | 23782 | 2019-04-05 06:59:58 | 26384 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Results from 10 sampling stations show that only one species of the purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1930) were caught by automatic squid jigging gear. The distribution and abundance of the purpleback flying squid in term of the CPUE (number of squid per line hour) are presented. Over the entire survey area, the CPUEs of the squid were ranged between 0.25-9.11squids per line hour. Drop-off rates for jigs fished on the jigging machines were averaged 3 squid/line hour. Angling depth where the squid were abundant ranged between 50 and 100m. A total of 1,439 squids were measured and mantle length ranged from 90 to 240 mm. Female dominated the catch, accounting for 80% of the all squid sexed. Males were generally smaller than females. The mantle length composition for males was single peak mode at between 120 and 130 mm. Females also had one peak between 120 and 130 mm mantle length with means of 150.5 mm. A similar length-weight relationship coefficient between male and female was found. The main preys of the squid were crustaceans, fishes (mainly flying fish) and squid. The squid were found in a warm water mass where the sea temperature ranged from 18°c to 30°c at the depth from 125m up to sea surface at night. Good fishing ground of the squid was at 14°N latitude and 112°E longitude (9.11 squids/line hour) nearby the existing upwelling at 111°E longitude.
    Keywords: Fisheries ; Length-weight relationships ; Marine fisheries ; Feeding ; Geographical distribution ; Potential resources ; Sex ratio ; Salinity profiles ; Marine molluscs ; Catch-effort ; Temperature profiles ; Sthenoteuthis oualaniensis ; Ommastrephidae ; Cephalopoda ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 181-197
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  • 39
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    Nanoplankton distribution and abundance in the Vietnamese waters of the South China Sea (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26385 | 23782 | 2019-04-05 08:38:26 | 26385 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A collaborative sea cruise in the Vietnam waters of the South China Sea was conducted in the postmonsoon (21 April to 5 June, 1999) period on board MV SEAFDEC. The nanoplankton from 21 sampling stations consisted of 134 taxa comprising predominantly of centric nanodiatom (29 species), pennata nanodiatom (40 species) and dinoflagellate (65 species). Among the minute plankton collected, three species of nanodiatom (Minidiscus comicus, M. chilensis, M. trioculatus) and numerous dinoflagellate species were present. The pennate nanodiatom comprised of the species of Asterionella, Psammodiscus and Amphipleura ranging from 5.25 x 102 to 1.67 x 104 cell/L; all which were 〈20?m in size. The dominant centric nanodiatom comprised of species of Thalassiosira, Minidiscus, Chaetoceros and Cyclotella, ranging from 1.36 x 102 to 4.61 x 104 cell/L. The genera of Chaetoceros, Minidiscus, Cyclotella, Coscinodiscus, Navicula, Fragilaria and Thalassiosira contained a wide range of species; however, majority of these species were new records and have not been taxonomically identified. The Prymnesiophyta (mostly small flagellate cells and Prasinophyta species) were rarely present; while those of dinoflagellate consisted of a wide range of species of genera Amphidoma, Centrodinium, Palaephalacroma, Peridinum, Planodinium, Gyrodinium, Gonyaulax, Scrippsiella, Protoperidinium and Protocentrum. The genera of Protoperidinium, Peridinium, Gonyaulax and Prorocentrum had a wide range of species. The class Heptophyceae comprising of Prymnesiaceae, Coccolithaceae and Gephyrocapsaceae were rarely present. The total nanoplankton population (ranging from 0.24 x 104 to 5.47 x 104 L-1) was dense in nearshore regions (especially in waters between Da Nang and Nha Trang) and tend to spread out in concentric semicircle into the open sea. The presence of the dinoflagellate species of Amphidoma, Centradinium and Planadinium were detected in considerable amounts at midshore Vietnam waters of the South China Sea. Blooms of Gyrodonium sp. and Amphidoma sp. (to a limited extend) occurred during the study period.
    Keywords: Oceanography ; Community composition ; Geographical distribution ; Ecological associations ; Abundance ; Check lists ; Plankton ; Nannoplankton ; Algae ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 198-232
    Format: 35
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  • 40
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    Status and prospects of Korean fisheries (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26894 | 23782 | 2019-11-12 08:24:02 | 26894 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The Korean fisheries is highlighted by a rapid increase in annual total production until 1990, but the trend has nearly leveled off in recent years. The total catch from coastal and offshore fishery maintained an increasing trend; while production from aquaculture has gradually increased, the inland water fishery has decreased, starting in 1980. The total population engaged in the fishery industry sector has decreased continuously every year. The production of fishery products in recent years has remained at a constant level. The total amount of import of fish and fishery products increased sharply in recent years while the exports did not vary. The Korean fishery industry has been facing serious difficulty not only due to the decrease of coastal and offshore fishery resources, but also the withdrawal of deep-sea fishing vessels from the coastal country's jurisdiction areas following the extension of 200 nautical miles EEZ. Some suggestions are given to overcome the present and future anticipated difficulties.
    Keywords: Fisheries ; Marine fisheries ; Industrial products statistics ; Fishery statistics ; Fishery management ; Inland fisheries ; Fishery development ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 54-67
    Format: 14
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  • 41
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    Outline of fishery statistics: Japan (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26893 | 23782 | 2019-11-12 08:25:48 | 26893 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: An outline is given of the Japanese survey system of fishery statistics, which is classified into 4 groups: production structure; fishery production; fishery economy; and, marketing of fishery products.
    Keywords: Fisheries ; Fishery economics ; Marine fisheries ; Fishery statistics ; Fishery surveys ; Inland fisheries ; Marketing ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 49-53
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  • 42
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    Country report of Indonesia (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26892 | 23782 | 2019-11-12 08:28:10 | 26892 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The vast area comprising the Indonesian archipelago means that the utilization of fishery resources has varied ways of implementation. Therefore, data collection for fishery statistical purposes has been designed considering these complex situations. An account is given of general trends in the Indonesian fishery sector, outlining the fishery policy towards 2010. The status of the national fishery statistical systems is described. For statistical purposes in Indonesia, fisheries are classified into the following sectors and sub-sectors: 1) Marine fishery -- capture/fishing, culture; and, 2) Inland fishery -- capture/fishing in open waters, culture in inland waters, brackishwater culture, freshwater pond culture, cage and pen culture, paddy-cum-fish culture. An examination is made of the problems and constraints in collecting fishery statistics, considering the 2 categories: technical or statistical; and, operational. Proposals are made for the improvement of national fishery statistical systems.
    Keywords: Fisheries ; Marine fisheries ; Data processing ; Fishery statistics ; Aquaculture development ; Inland fisheries ; Aquaculture statistics ; Pond culture ; Cage culture ; Marine aquaculture ; Freshwater aquaculture ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 27-48
    Format: 22
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  • 43
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    Country report: Malaysia (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26896 | 23782 | 2019-11-12 07:34:53 | 26896 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Details are given of the current status of fishery and aquaculture statistics in Malaysia, covering the data collection system for the estimation of the annual fishery production for the country. The Department of Fisheries, Ministry of Agriculture is the main organization responsible for the collection, compilation, processing and reporting the fishery statistics. However, trade data on fish and fishery products are collated and reported by the Department of Statistics of Malaysia. The fishery statistics collected and collated comprise the following major aspects: marine capture fisheries; aquaculture; inland water bodies; fisheries trade data. An outline is also provided of the current and future economic aspects of the fishery sector in Malaysia, and its contribution to economic development. Fish production, fish for food and non-food use, total fish trade, fishery policy towards 2010, future demand and strategy for development are covered.
    Keywords: Fisheries ; Fishery economics ; Marine fisheries ; Industrial products statistics ; Fishery statistics ; Inland fisheries ; Aquaculture statistics ; Marine aquaculture ; Freshwater aquaculture ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 75-94
    Format: 20
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  • 44
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    Fishery statistics in the Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26898 | 23782 | 2019-11-12 06:32:17 | 26898 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Following a brief account of the general trends currently observed in the fishery sector of the Philippines, a discussion is presented on the status of the National Fishery Statistical System. Fishery policy towards 2010 is also examined. It is concluded that fishery statistics in the Philippines are important due to the sector's sizable contribution to the national economy. Substantial funding support has been given to the Bureau of Agriculture Statistics to improve the methods of data generation, sampling designs and estimation procedures. The dissemination of fishery statistics has been enhanced with the creation of the Philippine Fisheries Information System at the Bureau of Fisheries and Aquatic Resources and the EASIBOARD of the Philippine Statistical Association. These systems will hopefully improve and accelerate data retrieval and information exchange among various fishery institutions and agencies.
    Keywords: Fisheries ; Marine fisheries ; Fishery statistics ; Inland fisheries ; Data acquisition ; Information systems ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 101-113
    Format: 13
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  • 45
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    Present status of fishery statistics in Myanmar (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26897 | 23782 | 2019-11-12 07:32:08 | 26897 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The Myanmar Department of Fisheries, under the Ministry of Livestock Breeding and Fisheries, is responsible for the management of fisheries, conservation of resources, providing extension services, conducting research, and compilation of the national statistics in fisheries. Following a brief account of the types of fisheries in Myanmar, both marine and freshwater, an examination is made of fish production, licensed offshore fisheries (1996-1997), licensed inshore (1996-1997), export data, TCP/MYA/4553 Project and project activities (November 1995 to August 1997). The fishery sector is considerably important in the economy of the country, as fish constitutes a major source of animal protein in the diet of the people and is the 5th largest source of foreign exchange earnings. Fishery statistics are important in fishery management, and therefore the formulation and strengthening of fishery statistics survey is very useful for the fishery management of Myanmar.
    Keywords: Fisheries ; Marine fisheries ; Industrial products statistics ; Fishery statistics ; Fishery management ; Inland fisheries ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 95-100
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  • 46
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    Country paper: Thailand. Part 1: Thailand fishery and its statistics (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26901 | 23782 | 2019-11-12 06:25:48 | 26901 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Following an account of the current general trends in the Thai fishery sector, details are given of policies and action plans towards 2010. The status of National Fishery Statistical Systems is examined, considering Fishery Census and current fishery statistics surveys.
    Keywords: Fisheries ; Marine fisheries ; Fishery statistics ; Fishery management ; Inland fisheries ; Fishery development ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 132-143
    Format: 12
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  • 47
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    Fishery statistics of Taiwan (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26900 | 23782 | 2019-11-12 06:29:11 | 26900 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Following a brief account of current general trends in the fishery sector of Taiwan, details are given of fish production and fishery policy towards 2010. The status of National Fishery Statistics Systems is outlined, describing the Fishery Census, and catch-effort and fish processing statistics. Some proposals are made to improve the National Fishery Statistical Systems.
    Keywords: Fisheries ; Marine fisheries ; Industrial products statistics ; Fishery statistics ; Inland fisheries ; Fish catch statistics ; Catch/effort ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 114-131
    Format: 18
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  • 48
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    Statistical data on Vietnamese fisheries (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26903 | 23782 | 2019-11-12 06:14:21 | 26903 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A brief account is given on the current situation regarding the Vietnamese fisheries, describing the country's fishery policies towards 2010. Proposals for the implementation of the various policies it had developed include: institutional strengthening; strengthening the science and technology to speed up production; and, strengthening fisheries planning. The existing fishery statistical system is detailed.
    Keywords: Fisheries ; Fishery policy ; Marine fisheries ; Fishery statistics ; Inland fisheries ; Fishery development ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 159-164
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    Current FAO fishery statistics programme (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26904 | 23782 | 2019-11-12 06:11:35 | 26904 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: FIDI, the FAO Fishery Information, Data and Statistics Unit, is responsible for the collection of global fishery statistics. Statistics on catches and landings have been collated by the FAO since 1950. The statistics are usually obtained from national reporting offices and, wherever possible, verified from other sources. The resulting statistics are stored in databases and disseminated through annual publications such as the FAO Yearbook of Fishery Statistics, for catches and landings, aquaculture and commodities (and less frequent for the fleet statistics). The data are also made available in electric form by the distribution of diskettes with yearly updated platform independent databases with time series: FISHSTAT PC, AQUACULT PC and FISHCOMM PC. Details are given of the following FAO Fisheries Databases maintained by FIDI: Nominal catch and landings; Aquaculture production of fish; Fishery commodities; Fleet statistics; Employment statistics; Apparent consumption of fish and fishery products. Fishery statistical software packages are also detailed: ARTPLAN; ARTFISH/ARTSER for Windows; ARTHELP; and, ARTBIEC.
    Keywords: Fisheries ; Marine fisheries ; Computer programs ; Data processing ; Inland fisheries ; Aquaculture statistics ; Data collections ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 166-173
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    Follow-up by FAO to the recommendations from the 1994 Regional Workshop on Fishery Information and Statistics in Asia (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26906 | 23782 | 2019-11-12 06:06:46 | 26906 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Follow-up action by FAO regarding the recommendations from the 1994 Workshop on Fishery Information and Statistics in Asia is detailed under the headings: 1) Regional and international levels; 2) Fishery statistical bulletin for the South China Sea area; 3) Socio-economic statistics; and, 4) Aquaculture statistics.
    Keywords: Fisheries ; Marine fisheries ; Computer programs ; Fishery statistics ; International cooperation ; Inland fisheries ; Aquaculture statistics ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 183-187
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    Quality of capture fishery and aquaculture production statistics for Asia and the Pacific (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26911 | 23782 | 2019-11-14 00:43:26 | 26911 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A review is made of the FISHSTAT NS1 total production statistics and the FISHSTAT AQ aquaculture production statistics for Asia and the Pacific, reported to the FAO. An examination is also made of the quality of these statistics, identifying problems and providing recommendations for possible remedies.
    Keywords: Fisheries ; Marine fisheries ; Fishery statistics ; Inland fisheries ; Aquaculture statistics ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 203-209
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  • 52
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    Recent international initiatives with implications for fishery statistics (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26905 | 23782 | 2019-11-12 06:08:48 | 26905 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Information is provided on various developments since the 1994 Regional Workshop of Fishery Information and Statistics in Asia, at the global level which may have implications for fishery statistics, particularly as a basis for fishery management. The following are covered: UN Agreement on straddling fish stocks and highly migratory fish stocks; FAO compliance agreement; Code of conduct for responsible fisheries; and, Kyoto declaration and plan of action.
    Keywords: Fisheries ; Marine fisheries ; Fishery statistics ; Inland fisheries ; International agreements ; Information systems ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 174-182
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  • 53
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    Country paper: Thailand. Part 2: General trends in the fishery sector (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26902 | 23782 | 2019-11-12 06:19:10 | 26902 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Following an account of the contribution of the Thai fishery sector to the national economy, details are given of the results of the various marine fishery censuses conducted in 1967, 1985 and 1995. Other surveys covered include: log book survey, fishing community survey, coastal culture survey, specialized survey, and inland fishery production survey.
    Keywords: Fisheries ; Fishery economics ; Marine fisheries ; Fishery statistics ; Fishery surveys ; Inland fisheries ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 144-158
    Format: 15
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  • 54
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    Recent developments in aquaculture statistics (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26915 | 23782 | 2019-11-13 06:17:42 | 26915 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: The FAO Fisheries Information, Data and Statistics Unit has been systematically collecting and disseminating global aquaculture production by weight and value since 1984. The mechanisms for collecting data and the coverage and quality of data on production from aquaculture provided by countries to FAO have been constantly under review, with the aim of improving their quality and relevance to future national and global needs. Such future needs are highlighted and a discussion presented as to how some of these needs are being currently addressed. The following topics are covered: aquaculture as an economic activity; definition of aquaculture; unidentified aquatic organisms; proposed changes for reporting global production from fisheries; quantitative structural information on aquaculture; and, current status and constraints of collecting aquaculture statistics.
    Keywords: Aquaculture ; Fisheries ; Data processing ; Aquaculture development ; Aquaculture statistics ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 242-254
    Format: 13
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  • 55
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    Socio-economic information for fishery management and development (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26916 | 23782 | 2019-11-13 06:14:54 | 26916 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: A wide array of socio-economic data is needed for effective fishery management and development planning. Biological, technical, economic, social, and institutional information and data are required for sound management. How much information and routine, long-term data are essential and how reliable the data should be, has to be determined on a case by case basis. The type of data collected, their frequency, and the method of data acquisition vary greatly among countries with the varying importance of the fishery sector in the national economy. A brief account is given of the requirements and problems in data collection.
    Keywords: Fisheries ; Fishery economics ; Fishery statistics ; Fishery management ; Fishery development ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 256-261
    Format: 6
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    Regional cooperation for fishery statistics program (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26919 | 23782 | 2019-11-13 06:05:26 | 26919 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Fishery statistics have been successfully used to highlight increasing fishery production and contribution of fisheries to national economy. They are generally collected and compiled into national and regional yearbooks to demonstrate changes in fishery production from the previous year, or over a given period of time. An examination is made of regional cooperation for a fishery statistics programme, considering the Southeast Asia region and various issues and constraints in the compilation and utilization of fishery statistics. It has been shown that the basic functions of fishery statistics programmes are to provide data and information services for the sector management. Thus, regional cooperation in fishery statistics programmes must begin with identification of the sector management needs and determination of data requirements to address the needs identified. It is concluded that the region has made considerable progress in developing and establishing common data handling methodologies and tools. The existing regional standards include standard definitions and classifications of fish species, fishing gears and fish products used for compilation of statistics for the South China Sea Areas and FAO. Regional cooperation and collaboration ensure benefits of shared expertise and resources, and availability of comparable data for management and development of regional fisheries resources and industries.
    Keywords: Fisheries ; Data processing ; Fishery statistics ; Information services ; International cooperation ; Data collections ; Data acquisition ; Marine ; Brackish ; Freshwater
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 298-306
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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
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    Format: application/pdf
    Format: application/pdf
    Format: 76-100
    Format: 25
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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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    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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    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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    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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    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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    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
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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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  • 65
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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
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    The Arctic Ocean’s Beaufort Gyre (2023)
    Annual Reviews
    Details
    Publication Date: 2023-02-28
    Description: © The Author(s), 2023. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Timmermans, M.-L., & Toole, J. The Arctic Ocean’s Beaufort Gyre. Annual Review of Marine Science, 15(1), (2023): 223-248, https://doi.org/10.1146/annurev-marine-032122-012034.
    Description: The Arctic Ocean's Beaufort Gyre is a dominant feature of the Arctic system, a prominent indicator of climate change, and possibly a control factor for high-latitude climate. The state of knowledge of the wind-driven Beaufort Gyre is reviewed here, including its forcing, relationship to sea-ice cover, source waters, circulation, and energetics. Recent decades have seen pronounced change in all elements of the Beaufort Gyre system. Sea-ice losses have accompanied an intensification of the gyre circulation and increasing heat and freshwater content. Present understanding of these changes is evaluated, and time series of heat and freshwater content are updated to include the most recent observations.
    Description: Support was provided by the National Science Foundation Office of Polar Programs and the Office of Naval Research.
    Keywords: Arctic Ocean ; Beaufort Gyre ; Circulation ; Sea ice ; Freshwater ; Ocean heat content
    Repository Name: Woods Hole Open Access Server
    Type: Article
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