• Title, Summary, Keyword: TAC

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A Bioeconomic Analysis on the Effectiveness of Total Allowable Catch(TAC) Policy under the Rebuilding Plan (자원회복계획 하에서의 총허용어획량(TAC) 어업정책 효과에 관한 생물경제학적 분석 -미국 멕시코만의 Yellowedge Grouper 어업을 사례로-)

  • Kim, Dohoon
    • Environmental and Resource Economics Review
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    • v.12 no.4
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    • pp.663-686
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    • 2003
  • This study is aimed at analyzing the effectiveness of TAC policy using a bioeconomic model. A surplus-production model is used as a population dynamic model, from which the yellowedge grouper is estimated to be overfished. As a result, a 10-year rebuilding plan using the TAC policy is established. According to the result of model, under the well-enforced system, the target stock biomass is achieved during the rebuilding period. Especially, in order to accomplish the target stock biomass, the annual quota should be allocated much less than 342 tons that NMFS recommended. The NPV over a 25-year under the TAC policy Is predicted to be less than under the status quo. The economic gains under the variable-catch TAC policy is less than under the constant-catch TAC policy as the interest rate decreases, while the NPV under the constant-catch is greater than under the variable-catch TAC policy when the interest rate is high.

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Development and Implementation of Cooperative-based Co-management TAC Quota Management System in Korean Fisheries Management (한국형 TAC 제도의 협동관리적 할당량관리체계(QMS)에 관한 연구)

  • 이상고;류정곤
    • The Journal of Fisheries Business Administration
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    • v.32 no.1
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    • pp.99-123
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    • 2001
  • The relatively recent emphasis on a total allowable catch(TAC) system is placing new demands on fisheries management. Korean fisheries law has provided recently for implementation of the TAC based on fishery management system, in order to conserve and manage fisheries resources rationally in its exclusive economic zone(EEZ). In 1998, the TAC system was first applied to Korean fisheries. This TAC system is currently undergoing a second trial period, having been put under the system for 20012002 and continuous trial basis until the complete settlement of EEZ system agreement among three countries, Korea, China and Japan. The TAC system implementation needs are sophisticated information collection, analysis and modeling that will continue to increase and require the high management resources. In addition, data on social and economic impacts on TAC system is sometimes inadequate. The implementation of the TAC system provides a unique opportunity to examine the limits of management information and resources, and to solve the problems in Korean fisheries management system, These limits and problems are complicated by an inadequate biologically and economically information and insufficient management resources. Government and fisheries cooperatives must be cooperated in the management process in order to minimize its conflicts and maximize commitment to sustain fishery development. Recognition of the ineffectiveness and its potential consequences leads to the adoption of the cooperative-based co-management approach in implementation of TAC system. In 1998, the TAC system was first applied to Korean fisheries, where traditional fishery management has consisted mainly of technical measures and input controls. The QMS of TAC system has been implemented in the form of cooperative-based co-management framework. This QMS framework was chosen to overcome many difficulties and limits that a competitive TAC system would impose on Korean traditional fisheries management. The implementation of the QMS of TAC system provides a unique opportunity to examine the limits of management information and resources, and to solve the problems in Korean fisheries management system.

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ABTS 법을 이용한 유단백질 가수분해물의 항산화 활성 측정

  • U, Seong-Ho;Kim, Geo-Yu
    • Proceedings of the Korean Society for Food Science of Animal Resources Conference
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    • pp.269-271
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    • 2006
  • Casein과 whey의 가수분해 물에 대한 항산화 능을 측정하기 위해 연구를 수행하였다. pH에 따른 Total antioxidant capacity(TAC)는 casein 및 whey 모두 pH 6.0 에서 보다 pH 7.4에서 더 높은 TAC 결과를 나타내었다. Casein이 whey보다 농도가 증가함에 따라 TAC 값이 증가하였으며 이는 배양시간이나 pH에 따른 TAC 측정에서와 같이 casein이 whey보다 더 높은 TAC 값을 나타내고 있으나, $2,000{\mu}g/mL$에서는 TAC 값이 감소하여 casein, whey 모두 유사한 TAC 값을 나타내었다. Trypsin에 의한 casein 및 whey의 가수분해는 반응 10분 이후부터는 NPN 량이 더 이상 증가하지 않았으며 casein보다 whey가 분해율이 낮았다. Trypsin처리한 casein과 whey의 TAC를 측정한 결과로서 trypsin 처리구가 무처리구에 비해 높은 TAC 결과를 나타내었다.

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The reactive oxygen species-total antioxidant capacity score is a new measure of oxidative stress to predict male infertility

  • Sharma, Rakesh K.;Pasqualotto, Fabio F.;Nelson, David R.;Thomas Jr, Anthony J.;Agarwal, Ashok
    • 대한생식의학회:학술대회논문집
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    • pp.29-35
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    • 2000
  • The imbalance between reactive oxygen species (ROS) production and total antioxidant capacity (TAC) in seminal fluid indicates oxidative stress and is correlated with male infertility. A composite ROS-TAC score may be more strongly correlated with infertility than ROS or TAC alone. We measured ROS, TAC, and ROS-TAC scores in semen from 127 patients and 24 healthy controls. Of the patients, 56 had varicocele, eight had varicocele with prostatitis, 35 had vasectomy reversals, and 28 had Idiopathic infertility. ROS levels were higher among infertile men, especially those with varicocele with prostatitis (mean ${\pm}$ SE, 3.25 ${\pm}$ 0.89) and vasectomy reversals (2.65 ${\pm}$ 1.01). All infertility groups had significantly lower ROS-TAC scores than control. ROS-TAC score identified 80% of patients and was significantly better than ROS at identifying varicocele and idiopathic infertility. The 13 patients whose partners later achieved pregnancies had a mean ROS-TAC score of 47.7 ${\pm}$ 13.2, similar to controls but significantly higher than the 39 patients who remained infertile (35.8 ${\pm}$ 15.0; P < 0.01). ROS-TAC score is a novel measure of oxidative stress and Is superior to ROS or TAC alone in discriminating between fertile and infertile men. Infertile men with male factor or idiopathic diagnoses had significantly lower ROS-TAC scores than controls, and men with male factor diagnoses that eventually were able to initiate a successful pregnancy had significantly higher ROS-TAC scores than those who failed.

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Effectiveness Analysis on Comb Pen Shell Based on TAC System (키조개 TAC 제도의 효과 분석)

  • Jeong, Min-Ju;Nam, Jong-Oh
    • The Journal of Fisheries Business Administration
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    • v.47 no.3
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    • pp.15-33
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    • 2016
  • This study aims to analyze effectiveness of the resource use under the total allowable catch system (TACs) of Comb pen shell, a species among TAC targeting ones through its stock assessment based on the surplus production model such as the Clark Yoshimoto Pooley (CYP) model. Particularly, this study is separated into five analysis periods in order to understand changes in Comb pen shell resource and its efficient use after TAC system implemented in 2001. The results of this study are as follows. First, five sustainable yield curves (SYCs) and exponential growth functions (EGFs) produced by the surplus production model based on Gompertz growth function to compare before and after implementation of the Korean TAC system show that the TAC system has generated a positive stock rebuilding effect for Comb pen shell caught by the diver fishery since 2001. Secondly, five profits based on differences between the sustainable total revenue (STR) and the total cost (TC) with respect to fishing efforts present that the TAC system has increased efficiency of resource use of Comb pen shell caught by the diver fishery after implementation of the Korean TAC system. In conclusion, the Korean TAC system has increased efficiency of resource use as well as has led a positive stock rebuilding effect for Comb pen shell.

Study on the Possibility of Implementation of TAC Management System in China (중국의 어획량관리제도 도입가능성에 관한 소고)

  • 박영애
    • The Journal of Fisheries Business Administration
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    • v.31 no.2
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    • pp.47-65
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    • 2000
  • The existing Law of fisheries Management of China was firstly established on October 30th, 1986 and revised in October, 2000. The new Law of Fisheries Management provided a basis for introduction of the TAC (total allowable catch) system into China. Introduction of the TAC system is a natural result of the practise of EEZ (exclusive economic zone). In addition, the inability of the traditional fishery management system and the promising results obtained by conductions of TAC system in some countries with advanced fishery also make the introduction of TAC system a necessity, However, the contradictions between the unrealistic introduction of the fisheries management systems, the small-scale operation, higher expense of the conduction and supervision of the systems, and the insufficiencies of human power, financial fund, and scientific technique of the underdeveloped country resulted in the ineffectiveness of the new systems. So this study is to discuss the background and the possibility of TAC system implementation in china. The results of this study showed that many factors restrict the implementation of TAC system into China at present. It will take a long time to practise the new system. meanwhile, reforming and improving the functions of the existing systems to provide a better environment will play an important role in the introduction of the TAC system into china.

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Evaluating the TAC Policy in the Sandfish Stock Rebuilding Plan (도루묵 수산자원회복계획에서의 TAC정책 평가)

  • Kim, Do-Hoon
    • The Journal of Fisheries Business Administration
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    • v.46 no.1
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    • pp.29-39
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    • 2015
  • This study aimed to evaluate the TAC policy and to examine the effective annual TAC quota in the sandfish stock rebuilding plan using a bioeconomic modelling method. In the analysis, first, a sandfish bioeconomic model was developed by combining a sandfish stock population model and economic models by fishery and second, achieving stock rebuilding targets and changes of fishing revenues by the level of annual TAC quota were examined. Model results indicated that the TAC 1,500ton policy would have the greatest impact on the increase of sandfish stock biomass comparing to the status quo and other TAC policies. In addition, it was evaluated that the total fishing revenues of coastal gillnet and danish seine fisheries could be increased the most in the TAC 2,500ton policy. In both cases of TAC 3,500ton and 4,000ton, the fishing revenues of both fisheries were inversely reduced due to the decrease of catch by coastal gillnet and the decline of market prices by danish seine's excessive catch. Furthermore, they would have a negative impact on sandfish stock biomass.

A Study on the Korean Fishery Management System and TAC System Implementation on Issues of the New Ocean Regime (신해양질서의 어업관리체계와 TAC 제도 도입에 관한 연구)

  • 이상고
    • The Journal of Fisheries Business Administration
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    • v.30 no.1
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    • pp.1-29
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    • 1999
  • When the international fisheries order changes following the UN Law of the Sea, the new regional fisheries order is forming among East North Asian states and era of Economic Zones is really coming. In those changes of foreign and domestic fisheries environment, to maintain sustainable growth of the industry in 21st century the North East Asian states plot adjustments to fisheries management, such as introduction of the TAC system and others. The TAC seems to be an appropriate systematic response especially because traditional functions of fisheries management have already demonstrated their limits in regards to fisheries sustainable development. Introduction of the TAC to the North East Asian fisheries not only resolves the inability of traditional fisheries management to develop the industry consequently, but also strengthens the EEZ and existing marine management systems. However, the TAC was born by thewestern industrial mentality, still contains persistent mistakes and is difficult to change. Therefore, its introduction to and implication in North East Asian region might cause numerous problems. From this point of view, introduction of the TAC system will disregard peculiarities of North East Asian fisheries, so main efforts should be concentrated on improving the functions of existing system via consecutive step-by-step approach. In addition, the TAC should be grafted into the existing fisheries system through cooperative management system, creating stable systematic ground and considering scientific and fisheries motives. Especially, TAC system, unlike the traditional fisheries' management system, is scientific, being systematically developed one, and needs to be gradually installed, considering its systematic character. Therefore, the TAC should better be introduced by systematic and scientific approaches, paying more attention to strengthening the existing fisheries system, but not immediately and in the form it is right now. Concluding, introduction of the TAC can not be made considering the outward factors deriving from the UN Law of the Sea without corrections.'h overcome limitations and ineffectiveness of traditional fisheries, most efforts should be concentrated on basic revision of 21st centuries' fisheries and strengthening the functions of traditional fisheries aimed to develop the leading business of marine industries.

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An Analysis of the Effects in the TAC System by Analyzing Catch of TAC Target Species (TAC 어종의 어획량 분석을 통한 TAC 제도의 효과 분석)

  • Sim, Seonghyun;Lee, Jungsam;Oh, Seoyeon
    • Ocean and Polar Research
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    • v.42 no.2
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    • pp.157-169
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    • 2020
  • This study aimed to analyze the effect of total allowable catches (TACs) on the target species. First to effects analyse of TACs, the 8 TAC target species and 75 non-target species were selected for which catch data were available before and after the introduction of the TACs. The 8 target species were simply compared to catch changes before and after TACs. Through the comparison, it was confirmed how the catches of target fishes have changed after the implementation of the TACs. Secondly, the Difference In Differences(DID) analysis was conducted to confirm the effects of the TACs on the catches of the target fishes using the catch data of 8 TAC target species and 75 non-TAC species. Finally, to overcome the limitations of the DID analysis, the random effects model was estimated to confirm the effects of the TACs on the catch of the TAC target species. Overall, this study confirmed that the TACs affects catches of target species, not only through simple comparisons of catches before and after the introduction of the TACs but also through econometric analysis.

The Effects of Electron Beam Irradiation on Thermal and Mechanical Properties of Electrospun Nylon 66 Nano-web (전기방사된 나일론66 나노웹의 열적·기계적 특성에 전자선 조사가 미치는 영향)

  • Jeun, Joon Pyo;Kang, Hyo-Kyoung;Kang, Phil Hyun
    • Journal of Radiation Industry
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    • v.5 no.1
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    • pp.69-73
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    • 2011
  • Polyamide 66 (PA66) nanofibers with Triallyl cyanurate (TAC) were obtained by electrospinning of formic acid and chloroform solution. Electron beam irradiation of PA66 nanofiber with and without TAC was carried out over a range of absorbed doses (20~100 kGy) in nitrogen. The characterization of the irradiated PA66 nanofibers and PA66 nanofibers with TAC was done by scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA) and universal testing machine (UTM). The results of the SEM image analysis confirmed that the morphology of PA66 nanofibers was not altered by electron beam. The amount of TAC in PA66 nanofiber with TAC was identified by $^1H-NMR$ analysis. The degradation temperature of PA66 nanofibers with TAC at an absorbed dose of 20~100 kGy was higher than the irradiated PA66 nanofiber without TAC. On the other hand, the decreasing rate of modulus of irradiated PA66 nanofibers with TAC was less than PA66 nanofibers.