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  • Aquaculture  (3,554)
  • 2020-2022  (3,517)
  • 2005-2009  (37)
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  • 1
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    Developing a national marine electronics agenda : proceedings of the Marine Instrumentation Panel meeting, September 12-14, 1989 (2006)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-26
    Description: Thirteen short papers address aspects of competitiveness in the marine electronics instrumentation industry. Topics include activity and status of government initiatives in Japan and Europe to promote this industry; and the possible role of federal-state collaboration in the U.S. Papers address technology transfer between research institutions and the commercial sector; the role of "strategic alliances" in this process; and the "dual-use" concept in effective technology development and commercialization. Other papers address electronic technology applications in speific marine areas, such as the use and implications of the COMSAT mobile satellite communication infrastructure; electronic charts and safety of tanker operations; and instrumentation applications in aquaculture and environmental monitoring.
    Description: Funding was provided by the National Oceanic and Atmospheric Administration through a grant to the Massachusetts Centers of Excellence Corporation, grant No. NA87-AA-D-M00037.
    Keywords: Marine electronics ; Marine instruments ; Competitiveness ; Commercialization ; Marine economics ; State economic initiatives ; Technology transfer ; R&D ; Japan ; Europe ; United States ; Massachusetts ; Hawaii ; Aquaculture ; Tanker safety
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: 7040644 bytes
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  • 2
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    Deployment of the northern fish cage and mooring, University of New Hampshire — Open Ocean Aquaculture Program summer 2000 (2005)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-26
    Description: The University of New Hampshire - Open Ocean Aquaculture (UNH-OOA) program has worked for the past few years on developing the technology to deploy and maintain fish cages in open, exposed northern waters. In June 1999, two Sea Station octagonal net cages by Ocean Spar Technologies were deployed with their UNH designed and constructed moorings. In June 2000 the Northern Cage and its mooring were retrieved, examined and repaired , and readied for redeployment. This was a complex operation, initiated by a team of UNH ocean engineers lead by Dr. Barbaros Celikkol. This year's effort was expanded with the addition of a Program Manager (Michael Chambers), the Fishing Vessel Nobska, and researchers from the Woods Hole Oceanographic Institution (WHOI). During the week of 21 to 25 August 2000, the cage and mooring were assembled and deployed at the UNH-OOA site seven miles offshore the New Hampshire coast, south of the Isle of Shoals. This collaborative effort involved members of the UNH Mechanical Engineering Dept., UNH divers, members of the WHOI Applied Ocean Physics & Engineering Dept. and the Captain and crew of the FV Nobska. Ship support for the deployment was provided by the R/V Gulf Challenger and Galen J. (UNH) and the FV Nobska (a 100 foot fishing vessel based at Woods Hole, MA). The work was favored by light wind and sea conditions. The endeavor resulted in the successful placement of the North Cage and its complex mooring system with load cells and environmental sensors. Unexpected and unexplained tangling of the mooring system, in particular near its grid corner points, was encountered and corrected.
    Description: Fudning was provided by the National Oceanic and Atmospheric Adminstration for the Open Ocean Aquaculture Project under Contract No. NA86RG0016 to the Univesity of New Hampshire and under Subcontracts 00-394 and 01-442 to the Woods Hole Oceanographic Institution.
    Keywords: Aquaculture ; Mooring ; Fish cage
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: 8889792 bytes
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  • 3
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    Depth-dependent target strengths of gadoids by the boundary-element method (2008)
    Acoustical Society of America
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Acoustical Society of America, 2003. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 114 (2003): 3136-3146, doi:10.1121/1.1619982.
    Description: The depth dependence of fish target strength has mostly eluded experimental investigation because of the need to distinguish it from depth-dependent behavioral effects, which may change the orientation distribution. The boundary-element method (BEM) offers an avenue of approach. Based on detailed morphometric data on 15 gadoid swimbladders, the BEM has been exercised to determine how the orientation dependence of target strength changes with pressure under the assumption that the fish swimbladder remains constant in shape and volume. The backscattering cross section has been computed at a nominal frequency of 38 kHz as a function of orientation for each of three pressures: 1, 11, and 51 atm. Increased variability in target strength and more abundant and stronger resonances are both observed with increasing depth. The respective backscattering cross sections have been averaged with respect to each of four normal distributions of tilt angle, and the corresponding target strengths have been regressed on the logarithm of fish length. The tilt-angle-averaged backscattering cross sections at the highest pressure have also been averaged with respect to frequency over a 2-kHz band for representative conditions of insonification. For all averaging methods, the mean target strength changes only slightly with depth.
    Description: This work began with sponsorship by the European Commission through its RTD-program, Contract No. MAS3-CT95-0031 (BASS), and was completed with support by the Office of Naval Research, Contract No. N000140310368.
    Keywords: Boundary-elements methods ; Aquaculture ; Underwater sound
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 4
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    Sistemas sostenibles de producción para el desarrollo del maricultivo con enfoque ecosistémico. La Acuicultura Multitrófica Integrada (AMTI). (2021)
    Details
    Publication Date: 2021-11-05
    Description: La demanda de productos pesqueros en el mercado mundial está aumentando, particularmente en Asia, dada la afluencia y la apreciación de los beneficios que ofrecen estos alimentos para la salud humana. Esto, combinado con el colapso significativo de las producciones provenientes de la pesca de captura, ha traído como consecuencia un desarrollo vertiginoso de la acuicultura. Hoy, la acuicultura mundial es el sector de más rápido crecimiento de la industria alimentaria y representa aproximadamente el 45,6 % del consumo mundial de pescado. Sin embargo, el rápido desarrollo de sistemas semiintensivos, especialmente la acuicultura marina intensiva, ha generado preocupación a nivel mundial por los posibles impactos ambientales, económicos y sociales del uso de estos sistemas. Durante los últimos años se han llevado a cabo significativas investigaciones sobre el desarrollo de sistemas sostenibles de producción de alimentos en agua salada, mediante el uso de sistemas mecánicos como, por ejemplo, los Sistemas de Recirculación Acuícola (RAS) y otros con un enfoque ecosistémico como la Acuicultura Multitrófica Integrada (AMTI). Este trabajo se basa en mostrar las características del desarrollo de los sistemas AMTI y las posibilidades de su aplicación como sistemas de producción amigables con el medio ambiente, que contribuyan a la seguridad alimentaria, orientados a fortalecer la resiliencia de las comunidades pesqueras y acuícolas dando respuesta a los Objetivos de Desarrollo Sostenible de la Agenda 2030.
    Description: The demand for fish products in the world market is increasing, particularly in Asia, given the influx and the appreciation of the benefits that this food offers for human health. This, combined with the significant collapse of production from capture fisheries, has led to the rapid development of aquaculture. Today, global aquaculture is the fastest growing sector of the food industry and accounts for approximately 45,6 % of global fish consumption. However, the rapid development of semi-intensive systems, especially intensive marine aquaculture, has generated worldwide concern about the possible environmental, economic and social impacts of the use of these systems. During the last few years, significant research has been carried out on the development of sustainable saltwater food production systems, using mechanical systems such as Aquaculture Recirculation Systems (ARS) and others with an ecosystem approach such as Integrated Multi-trophic Aquaculture (IMTA). This work is based on showing the characteristics of the development of the IMTA systems and the possibilities of their application as environmentally friendly production systems that contribute to food safety, oriented to strengthen the resilience of fishing and aquaculture communities by responding to the Sustainable Development Objectives of Agenda 2030.
    Description: Published
    Description: Refereed
    Keywords: Acuicultura ; Impacto ; Desarrollo sostenible ; Medio ambiente ; Alimentos ; Aquaculture ; Impact ; Sustainable development ; Environment ; Food
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.8-20
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  • 5
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    Current trends of breeding and cultivation of non-traditional aquaculture facilities (arctic charr, king crab, sea urchin) and aquatic processing technology (2021)
    Details
    Publication Date: 2021-10-19
    Description: The analysis of current scientific, technological, regulatory and methodical literature concerning cultivation and biotechnology of non-traditional species of fish (arctic charr) and valuable species of marine invertebrates (red king crab and sea urchin), as well as technology for complex processing of aquatic organisms has been carried out. The modern trends and problems of cultivation and use of these objects have been described. It has been shown that the freshwater form of Arctic charr has been successfully used in aquaculture in many countries while the aquaculture of anadromous (migratory) charr as an object of mariculture is still poorly developed and using this fish in mariculture is still too early. It is possible that in the near future as a result of breeding selection or interspecific crosses some forms with the required properties will be obtained. An analysis of published data suggests that there were no regular maintenance work in Russia on cultivation of sea urchins for obtaining their high-quality products to establish a basis (ingredients) of production for therapeutic and prophylactic purposes. The main efforts of previous studies on aquaculture of red king crab were aimed at the cultivation of larvae and postlarvae and rearing of mature males to reach an appropriate commercial quality. However, it should be noted that the methods of cultivation of crabs aged 3–5 years have not yet been well developed. There is also no information on the availability of accessible and relatively cheap ways to accelerate the molting process in crab, and it is known that just a long period of growing this crustacean (the commercial size is reached at age of 9–10 years) prevents the development of the red king crab aquaculture in a commercial scale. Modern processing of marine aquatic organisms should be based on a comprehensive, non-waste approach of producing traditional foods, therapeutic and prophylactic means and feed for aquaculture. The establishment of such a united technological cycle for processing red king crabs, sea urchins, and arctic charrs is a promising direction of development of the fish processing industry in the Murmansk region.
    Description: Проведен анализ современной научно-технической, нормативной, методической литературы, касающейся биотехнологий выращивания нетрадиционных видов рыб (арктического гольца), ценных морских видов беспозвоночных животных (камчатского краба и морского ежа), а также технологий комплексной переработки гидробионтов. Описаны современные направления и проблемы культивирования и использования данных объектов. Показано, что пресноводные формы арктического гольца успешно используются в аквакультуре во многих странах мира, освоение анадромных (проходных) гольцов в качестве объекта марикультуры остается малоизученным, считать его объектом марикультуры пока рано. Вполне возможно, что в скором времени в результате селекционного отбора или межвидовых скрещиваний будут получены формы с необходимыми свойствами. Анализ литературных данных позволяет заключить, что в РФ не проводились регулярные работы по аквариальному содержанию морских ежей с целью получения высококачественного сырья для создания основы (ингредиентов) продукции лечебно-профилактического назначения. Основные усилия предыдущих исследований искусственного разведения камчатского краба были направлены на выращивание жизнестойкой молоди (мальков) и подращивание некондиционных особей до товарного качества. Вместе с тем следует отметить, что способы культивирования крабов в возрасте 3–5 лет совершенно не изучены. Также нет сведений о наличии доступных и относительно дешевых способов, направленных на ускорение линьки краба, а известно, что именно долгий период роста этого ракообразного (товарного размера особи достигают за 9–10 лет) препятствует развитию аквакультуры вида в промышленных масштабах. Современная переработка морских гидробионтов должна основываться на комплексном безотходном подходе с получением традиционных пищевых продуктов, лечебно-профилактических средств и кормов для аквакультуры. Создание подобного единого технологического цикла при переработке камчатского краба, морских ежей и арктического гольца является перспективным направлением развития рыбоперерабатывающей отрасли на территории Мурманской области.
    Description: Published
    Description: Refereed
    Keywords: Aquaculture ; King crab ; Sea urchin ; Arctic char ; Biologically active substances of hydrobionts ; Аквакультура ; Камчатский краб ; Морской еж ; Арктический голец ; Биологически активные вещества гидробионтов ; Aquaculture ; Аквакультура
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.355-370
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  • 6
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    Antibiotics resistance in pathogenic bacteria isolated from water and sediment around the floating fish farms in the Nha Trang bay (2021)
    Details
    Publication Date: 2021-09-30
    Description: To assess the impact of antibiotic use in aquaculture in Nha Trang bay, we conducted this study with the aim of assessing antibiotic resistance of opportunistic pathogenic bacteria isolated from water and sediment around shrimp/fish cages in the Nha Trang bay. 109 strains of Vibrio, Salmonella-Shigella and Aeromonas groups were isolated in the surrounding environment of farming areas in Dam Bay and Hon Mieu. Antimicrobial resistance test of these 109 strains showed that in the water environment in Dam Bay, TET (96.6%) and NIT (92.5%) were the two antibiotics with the highest rates of resistant bacteria while no bacteria were resistant to RIF. All 5 types of antibiotics had a statistically insignificant percentage of antibiotic-resistant bacteria in water samples at Hon Mieu, ranging from 33.3% to 68.9%. Also in the water environment, the rate of antibiotic-resistant bacteria in Dam Bay was not influenced by the distance to the cages (42.5–66.6%). Meanwhile, in Hon Mieu, the highest rate of resistant bacteria was observed at the distance of 200 m (100%) away from cages and the lowest rate at the distance of 100 m (20%). In the sediment environment around the cages, both the Dam Bay and Hon Mieu farming areas showed the highest rates of antibiotic-resistant bacteria against TET, NIF and RIF had the lowest rate of resistant bacteria. Among the total of 109 strains tested for antibiotic resistance, 2 strains labeled TCBS_HM200 m and SS_HM200 m were found to be resistant to all 5 tested antibiotics. These two strains were respectively identified as Vibrio harveyi and Oceanimonas sp.
    Description: Published
    Description: Refereed
    Keywords: Nha Trang bay ; Aquaculture ; Sediment ; Seawater ; Pathogen ; Antibiotic resistance
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp. 199-209
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  • 7
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    Impact evaluation of community-based coastal resource management projects in the Philippines (2021)
    In:  http://aquaticcommons.org/id/eprint/9442 | 115 | 2012-10-12 05:13:03 | 9442 | WorldFish Center
    Details
    Publication Date: 2021-09-24
    Description: The benefits of decentralizing the management of coastal resources to local governments and resource users have long been recognized, but the best systems for coastal resources management depend on many factors. A number of community-based management and co-management projects were started in the Philippines in the early 1980s. This report describes a comparative assessment of these projects to determine where improvements can be made in the design of future community-based coastal resource management projects. Early and continuing involvement by project beneficiaries is one of the factors that contributes to the success of the project development, implementation, and evaluation.
    Keywords: Aquaculture ; Sociology ; Coastal zone management ; Coastal resources ; Resource management ; Popular participation ; Evaluation ; Fishery management ; Development projects ; Philippines
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 9-12
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  • 8
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    Preliminary chemical and physical evaluation of some formulated feeds for P. monodon (2021)
    In:  aqdchief@seafdec.org.ph | http://aquaticcommons.org/id/eprint/18588 | 17342 | 2015-11-09 16:11:44 | 18588 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-09-24
    Description: The culture of Penaeus monodon has explicitly defined the need for diet formulations or supplementary feeds that would promote optimum growth and survival of the animal. A total of 28 feed combinations were developed for P. monodon. Fish meal, shrimp head meal, squid head meal, Ascetes spp. rice bran, and soybean cake were used as primary ingredients in these feeds. The commercial vitamin mix No. 22 was added to the dry ingredients. Gelatinized corn starch and wheat flour were used as binders. The pellets were extruded using a portable kitchen grinder with a diameter of 4 mm. The products were either sun-dried for 8 hours or oven-dried overnight at 50 degree C to stabilize moisture at 8-10%. The pellets were then kept in covered glass bottles and stored in the laboratory at room temperature. The cost of the feeds excluding labour were also computed. The pellets were analyzed for protein, fat, carbohydrate, crude fiber, ash, and moisture contents using standard procedures. They were also analyzed for water stability. To test the stability of pellets in water, 2-g samples were placed in plankton nets (mesh #40) and suspended in water for two, and six hours. The undissolved samples were then vacuum-dried and the moisture determined. Cost of the feeds ranged from P1.10 to P2.60 per kg depending on the feed ingredient. Squid and Ascetes spp. were rather expensive for use as basic ingredients. Proximate analysis of dry weight showed percentage protein content ranged from 20-63 g; fat, 8-20 g; carbohydrate (by difference), 11-36 g; ash, 8-28 g; moisture, 6-11 g; and crude fiber, 5 . 13 g. Stability tests showed that after two hours, 35-88% of solids remained intact and after 6 hours, 20-55% of the pellets remained undissolved. When a pellet disintegrates easily, pollution of the water occurs. Chances for the shrimp to feed on the pellet is minimized when the pellet is unstable. Thus, the search for a more compact feed pellet has to be continued.
    Keywords: Aquaculture ; Chemistry ; Feed composition ; Crustacean culture ; Penaeus monodon
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 29-31
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  • 9
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    Preliminary biological evaluation of some formulated feeds for P. monodon (2021)
    In:  aqdchief@seafdec.org.ph | http://aquaticcommons.org/id/eprint/18591 | 17342 | 2015-11-09 16:14:16 | 18591 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-09-24
    Description: Rice bran is widely used by fish farmers as supplementary feed while soybean cake is used both as feed and as fertilizer in fishponds. Both fish meal and shrimp head have been found acceptable as feed ingredients. However, not much is known of the acceptability and efficiency of a mixture of these ingredients as feed for Penaeus monodon larvae. Ninety 127-day old P. monodon were measured for length and weight and were randomly divided into nine aquaria each containing 20 liters of water. These were fed 'lampirong' for two months previous to the study. There were three replications for each treatment. Length, weight, and survival rates were used to compare the efficiency of the diets. Weighed amounts of pellets equivalent to 100% of the body weight were fed during the first three days and reduced to 50% thereafter. A stopwatch was used to determine the length of time that elapsed before the shrimps would approach the pellet. Ten shrimps approximately 4 months in age were placed in 10 liters of water in a 25-liter aquarium. Two grams of each pellet type were placed simultaneously on opposite sides of the aquarium. The time that elapsed from the moment the pellets sunk to the bottom up to the time that any one shrimp approached the pellets was recorded. The group fed the imported pellets gained the most. Those fed FP-2s-77 elongated faster than those fed FP-1s-77. Survival rate of those fed FP-2s-77 was 37% while those fed imported pellets was 73%. Both 1s and 2s pellets disintegrated in water easily but the imported pellets were stable even after six hours in water. The attractability test for the pellets showed that the prawns were more readily attracted to the pellets 1s and 2s than to the imported pellets.
    Keywords: Aquaculture ; Crustacean culture ; Feed composition ; Penaeus monodon
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 32-33
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  • 10
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    Captive culture of two sea snake species Hydrophis curtus and Hydrophis cyanocinctus (2021)
    Details
    Publication Date: 2021-09-22
    Description: Acclimation culture and trial culture of two sea snake species Hydrophis curtus and H. cyanocinctus in composite tanks were conducted to determine growth, survival rate, predation behavior and prey selection. The results showed that adults of H. curtus and H. cyanocinctus did not capture any prey such as anchovy, eel and shrimp in a period of 30 days of acclimation culture. The body weight of two these species reduced gradually from 783.3 ± 76.4 g and 360.0 ± 60.0 g to 660.0 ± 135.2 g and 315.0 ± 77.8 g, respectively. Survival rate was 100% in H. curtus and 80% in H. cyanocinctus. Meanwhile, the results of acclimation culture of sea snake juvenile revealed that frozen anchovy was preferred prey in both of two species. The body weight of H. curtus increased from 49.8 ± 0.5 g to 70.0 ± 8.2 g and that of H. cyanocinctus was 44.3 ± 3.1 g to 47.1 ± 5.2 g. The prey capture rate of H. curtus and H. cyanocinctus was 100% and 60%, respectively. Survival rate of the juvenile of two species was 100% after 30 days of acclimation culture. In 60 days of trial culture, similar results as acclimation culture were observed in adults of two sea snake species, they still did not capture any prey and the body weight reduced gradually. The result of 60-day culture of sea snake juvenile showed that the prey capture rate was 100% in both of two species. The body weight of H. curtus and H. cyanocinctus increased from 70.0 ± 8.2 g and 57.5 ± 5.8 g to 78.3 ± 15.3 g and 65.0 ± 14.1, respectively. SGR of H. curtus was 0.16 ± 0.32 %/day and that of H. cyanocinctus was 0.52 ± 0.36%/day. The survival rate of H. curtus and H. cyanocinctus was 60% and 40% in period of 60 day trial.
    Description: Published
    Description: Refereed
    Keywords: Sea snake ; Hydrophis curtus ; Hydrophis cyanocinctus ; Aquaculture
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp. 105-114
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