• Title/Summary/Keyword: fish farm sea water

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Design of Auto Feed Supply System for Fish Farm (양식장용 자동 먹이공급시스템 설계)

  • Oh, Jin-Seok;Jo, Kwan-Jun
    • Journal of Navigation and Port Research
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    • v.33 no.10
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    • pp.709-713
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    • 2009
  • Water pollution of coast has a significant impact on the fish farm and fisheries. For solving the water pollution problems the fish farms are moving to the open sea. The fish farms in open sea have to operate by the automatic feeding system and remote monitoring system for safety and management. This paper describes an automatic feeding system for fish farms in open sea. Water temperature and fish weight will change depending on the amount of feed. And the fish farm temperature is changed extremely in open sea than on land side. This paper described that the feed amount is calculated automatically according to temperature, fish weight, and the automatic feed system. And the performance of automatic feed system is verified with test model for operation test.

Feed supply system for Fish farm in Ocean Sea (외해 가두리 양식장용 먹이공급시스템)

  • Oh, Jin-Seok
    • Journal of Navigation and Port Research
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    • v.34 no.10
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    • pp.793-797
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    • 2010
  • The depleting fishes resource and water pollution in coast has a decisive effect on the fish farm and fisheries. For solving these problems the fish farms are moving to the offshore. The fish farms in offshore have to design the strong mechanism as compared with cost's fish farm, and operate by the remote feeding system and monitoring system for safety and management.. This paper describes a remote feeding system for fish farms in offshore. The amount of feed is depending on temperature and fish weight. The fish farm temperature is changed extremely in offshore than on land side. This paper described that the feed amount is calculated automatically according to temperature and fish weight, and the remote feed system. The performance of remote feed system is tested with model.

Development of the Monitoring System for Ocean Fish Farm (해상 가두리 양식장 암모니아 모니터링 시스템 개발)

  • Oh, Jin-Seok;Jo, Kwan-Jun;Kwak, Jun-Ho;Jin, Sun-Ho;Lee, Jong-Ho
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2006.06a
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    • pp.273-274
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    • 2006
  • The sea is origin of all lift, and 90% of the all living organisms are in the sea. The biosynthesis is very different. Many organisms are kept on a lower or developed to another evolutionary level than on shore. Our society is increasing demand and need for marine food and this food has to product at onshore or offshore fish farming sites. Ocean fish farms have a special operation properties such as a good quality water, net cage, sheltered locations and feeding system. The farming site is controlled and monitored for fish welfare as ammonia($NH_3$), temperature, the speed of a running fluid. Specially, the fish farm is seriously influenced by ammonia. In this paper, $NH_3$ monitoring system for ocean fish farm is researched for the suitable fish farming sites, and test equipment is designed for achieving practical data. The equipment wit monitoring algorithm is expected to the useful system for ocean fish farm.

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Construction of Marine Small Hydro Power Plant using Discharge Water of Fish Farm (양어장 방류수를 이용한 해양소수력발전소 구축에 관한 연구)

  • Hwang, Yeong-Cheol;Choi, Young-Do
    • The KSFM Journal of Fluid Machinery
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    • v.16 no.5
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    • pp.11-17
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    • 2013
  • This study is aimed to construct a marine small hydro power plant using discharge water of fish farm in Jeju Haengwon-ri. The difference of design methods between marine small hydro power plant and land small hydro power plant is to consider the tides. Moreover, ground condition should be examined because gushout sea water comes out from the ground at high tide in Jeju as the ground of Jeju beach consists of basalt stone. From the field test of the turbine generator after construction of the power plant, output power and efficiency of the turbine generator shows good conformance to the required conditions.

Estimation of Green-House-Gas emissions from domestic aquaculture farm for flounders (넙치 양식장에서 발생하는 온실가스 배출량 산정)

  • YANG, Yongsu;LIM, Han-Kyu;LEE, Kyounghoon;LEE, Dong-Gil;SHIN, Hyeong-Ho
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.51 no.4
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    • pp.614-623
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    • 2015
  • This study aims to estimate the Green-House-Gas emissions from domestic farmed flounder in the southern sea and Jeju-Do, where is mainly produced, by the assessment of energy consumptions and GHG emissions from domestic fish farms for establishing reduce standards of greenhouse gas from a sustainable perspective. It needs to analyze such GHG emission components as feed, electricity, fuel, fixed capital, fish respiration, and liquid oxygen in two locations by 4 stage running water type farm size of small, small and medium, large and medium, large scale. The result showed that the mean GHG emissions were $36.83kg{\cdot}CO_2/year$ in the southern sea and $24.33kg{\cdot}CO_2/year$ in Jeju-Do, respectively, in the stage of production per fish 1kg at 2 locations and farm size from domestic farmed flounders, and it will give to be useful for policy, planning, and regulation of aquaculture development with establishing GHG reduction standards.

Prediction of Sea Water Condition Changes using LSTM Algorithm for the Fish Farm (LSTM 알고리즘을 이용한 양식장 해수 상태 변화 예측)

  • Rijayanti, Rita;Hwang, Mintae
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.26 no.3
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    • pp.374-380
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    • 2022
  • This paper shows the results of a study that predicts changes in seawater conditions in sea farms using machine learning-based long short term memory (LSTM) algorithms. Hardware was implemented using dissolved oxygen, salinity, nitrogen ion concentration, and water temperature measurement sensors to collect seawater condition information from sea farms, and transferred to a cloud-based Firebase database using LoRa communication. Using the developed hardware, seawater condition information around fish farms in Tongyeong and Geoje was collected, and LSTM algorithms were applied to learning results using these actual datasets to obtain predictive results showing 87% accuracy. Flask and REST APIs were used to provide users with predictive results for each of the four parameters, including dissolved oxygen. These predictive results are expected to help fishermen reduce significant damage caused by fish group death by providing changes in sea conditions in advance.

A Safety Study of the Fish Farm in Cheonsuman after Constructing the H Condominium (H 콘도의 건설에 따른 천수만 양식장 안전성 검토)

  • Han, Doo Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.8
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    • pp.4093-4099
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    • 2013
  • We studied sea water pollution by waste water of H condominium near the Bunam Lake in Seosan City. We simulated COD of discharged waste water, and other factors can be expected by proportional. The direction of sea flow is almost west, and there is no fish cultivation in the west area, so it is safe for fish cultivation. We assumed that there is no flow in the sea water, and simulated the divergence of water pollution. We concluded that, the fish cultivation will be free from danger of water pollution.

Effect Analysis about Inland Fish Farm for Development of Underground Seawater (육상양식용 지하해수 개발효과 분석)

  • Lee, Kwang-Nam
    • The Journal of Fisheries Business Administration
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    • v.46 no.1
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    • pp.63-74
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    • 2015
  • Due to red tide and abnormal currents that take place every year, the damage of inland fish farms that takes sea water is increasing frequently. Also, the households of inland fish farm due to the increase in the cost of fuel and electricity are struggling many hardships economically. In relation to underground seawater for it's farm analyzed economic effect based on the actual conditions for 1,700 inland fish farms, from this I have deduced policy implications for direction this project to be pursued from now on. The saving rate of costs of the fuel and electricity through the development of an underground seawater were approximately analyzed to decline about 3.4~9.7%, if utilizing only about 5% of the undeveloped farms, it was estimated effect of about 61 billion won, if 10%, it was estimated effect of about 122 billion won. Consideration in selecting the developer of underground seawater will be selected an character of farm method. It is expected this study will be helpful for business analysis related government in the fisheries.

Development on Real Time Application System for Fisheries Oceanography Information (실시간 어장정보 생산 부이시스템 개발 및 활용연구)

  • Lee, Chu;Suh, Young-Sang;Hwang, Jae-Dong
    • Journal of the Korean Association of Geographic Information Studies
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    • v.8 no.3
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    • pp.142-149
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    • 2005
  • To provide observed oceanography data at coastal fish and shellfish farm in the northeastern sea of the Korean peninsula on real time base, we developed real time application system for fisheries oceanography information. The system has been made up a mooring buoy system, a server for oceanography data collection, a server for archiving data and a database system, and a web server for providing fisheries oceanography information using internet. Futhermore, to support letters service on a cellular phone, we developed the communication system from mooring buoy to cell phone on real time base. The oceanography data derived from the system are water temperature speed and direction of current in surface layer middle layer and bottom layer in hour. We were able to quantify short term variation of ocean conditions within several days at shellfish farm such as a scallop sea farm using our system. To reduce damages of fish and shellfish farm from abnormal phenomena of ocean conditions such as a broken stratification of water, an occurrence of abnormal coastal cold water and warm water we will be able to move vertically and horizontally the sea farm facilities to proper conditions using real time oceanography information derive from the system.

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Dissolved Oxygen Budget in Floating Net Cage of Fish Farm at the Coastal Area -In case of yellow tail farm in Konli-Do- (해산 어류 양식장 가두리의 DO수지 -곤리도 방어 양식장의 경우-)

  • KIM Yong Sool
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.21 no.1
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    • pp.30-34
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    • 1988
  • In roastal fish farms the farmers, especialy engaging in dealing with the floating cage culture, going to know about relationships between holding capacity and water quality in cage. Some of water quality managers and specialists studing physiological ecology understand that the key of water quality management concerned fish farming is budget of dissolved oxygen. This paper deals with oxygen budget in floating cage of the yellow tail farms at southern coastal area in Korea. The sampling station is located at Konli-Do fish farm near Chungmu, and the data is collected for 24 hours from 3:00 p.m. 8th September 1987. In result, the needed oxygen coming after the consumption by the rearing fish had been supplied with the tide current exchange, the sum of oxygen produced by phytoplankton photosynthesis and diffused from atmosphere are no more that $43\%$ for the needs of sea water consumption included respiration of planktons and decomposition of organic matters. The optimum holding capacity of cage is possible to compute with the calculation of minimum diurnal water exchange rate $[Qin{\cdot}V^{-1}\;(C-\bar{c})]$ through net mesh of cage.

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