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1.
Application of a vessel monitoring system to advance sustainable fisheries management—Benefits received in Taiwan 总被引：1，自引：0，他引：1
Vessel monitoring systems (VMS) are considered important instruments for fisheries monitoring, control and surveillance (MCS) to reverse the current depressed state of the world’s fisheries, and have been mandated worldwide by fishery management agencies. The essential function of the system is to provide near-real time vessel position; the potential applications could, however, be more than that. This study explores the additional benefits, with practical examples, that Taiwan has received from implementing the system: in improving the quantity and quality of logbooks recovered, obtaining access to fishery-independent fishing effort estimates and prompt catch/effort reporting, enabling the possibility of regional management and understanding of both fleet dynamics and vessel behavior, and increasing efficiency of vessel safety protection. For other distant-water fishing nations, Taiwan’s experiences serve to demonstrate how the application of VMS technology can advance sustainable fisheries management. 相似文献
2.
《Marine Policy》2015
An important task of natural resource management is deciding amongst alternative policy options, including how interventions will affect the dynamics of resource exploitation. Yet predicting the behaviour of natural resource users in complex, changeable systems presents a significant challenge for managers. Scenario planning, which involves thinking creatively about how a socio-ecological system might develop under a set of possible futures, was used to explore uncertainties in the future of the Indian Ocean tuna purse seine fishery. This exercise stimulated thinking on how key social, economic and environmental conditions that influence fleet behaviour may change in the future, and how these changes might affect the dynamics of fishing effort. Three storylines were explored: an increase in marine protection, growing consumer preference for sustainable seafood, and depletion of tuna stocks. Comparing across several possible future scenarios, a number of critical aspects of fleet behaviour were identified that should be important considerations for fishery managers, but which are currently poorly understood. These included a switch in fishing practices, reallocation of effort in space, investment in new vessels and exit from the fishery. Recommendations for future management interventions in the Indian Ocean were offered, along with suggestions for research needed to reduce management uncertainty. 相似文献
3.
公共自行车系统是待开发的交通自愿碳减排项目。本文采用CCER方法学中的“快速公交项目”,计算北京市2012年公共自行车系统自愿碳减排量,并估算收益。结果显示：北京市2012年公共自行车自愿碳减排量为43.95 t CO2,出售可获得1538元的收益。同时估算得到北京市2015年公共自行车碳减排量为6874.5 t CO2,出售可获得约24万的收益。因此,北京等交通需求膨胀的特大型城市,随着公共自行车系统的持续壮大发展,公共自行车运营企业的经济效益有望通过碳交易实现较大提升空间。 相似文献
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5.
Ian C. Grieve 《水文研究》1990,4(3):231-239
Dissolved organic carbon (DOC) was measured at hourly or two-hourly intervals during more than 30 events in one forested and two moorland subcatchments of the Loch Fleet catchment in southwest Scotland. The dominantly peaty soils in the catchments resulted in small discharge-related DOC variations within individual events, with a maximum range of about 2 mg 1?1. Seasonal variations were larger with an amplitude of 8-9 mg 1?1 and maximum concentrations in the summer months. The forested stream had the highest mean DOC, twice as large as the comparable moorland stream in the preliming phase. Applications of lime to the catchments increased stream DOC concentrations, with the largest increases in the moorland catchments. 相似文献
6.
岳正华 《成都信息工程学院学报》2000,15(1):19-30
网络营销控制是网络管理的重要内容,开展网络市场营销活动必须有网络运转的有效控制作保证。在讨论网络营销控制特征与内容的基础上,着重分析了网络营销活动的盈利能力、营销效率和营销策略控制的方法与技术。 相似文献
7.
Agriculture was the primary target of moves to deregulate the New Zealand economy in 1984. Within twelve-months all production
subsidies had been removed, including those for fertiliser and other inputs, as well as funding for drought relief, floods
and other natural weather disasters. Whereas at the start of 1984, subsidies were estimated to represent as much as 33% of
farm income, by 2003 this had fallen to less than 2% with most of this spent on agricultural research. The anticipated shift
of thousands of people off the land did not appear to occur, and by conventional measures at least New Zealand agriculture
in 2003 is a major success story. At the core of the changes imposed on agriculture was a commitment to remove all state or
government distortions from the system and to fully expose the agricultural sector to market forces. This included wide-ranging
and fundamental changes in the broad institutional context within which agriculture must operate. All this was achieved at
great social cost and with a significant impact on the environment. In many respects New Zealand agriculture is now very different
from that in 1984. Some sectors, such as dairying, have grown and become increasingly industrialised. On the other hand, sheep
farming, particularly for wool has struggled to maintain its market share, while other enterprises have emerged as significant
sources of income, including horticulture, viticulture and fruit. It is argued here that the trends evident in New Zealand
agriculture since 1984 pre-existed the reform period and that the apparent success of the reforms evident at a national scale
have not addressed or removed the fundamental problems which face New Zealand agriculture, just as they do modern agricultural
systems elsewhere.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
9.
The aim of this study is to analyse the economic profitability of the Spanish Greenland halibut fleet in waters of the northwest Atlantic after the introduction of the halibut recovery plan. For it, the average yield and the investment payback period are used in the analysis. The results show a slight reduction in the average yield per vessel, especially at the end of the period and after the introduction of the halibut recovery plan, but with fishing profitability rates considerably high and payback periods slightly lower, in general, than the average life of a standard fleet vessel. 相似文献
10.
The Arman field in western Kazakhstan is estimated to hold recoverable reserves of 3.65 million metric tons of oil and 74
million cubic meters of gas. The field began production in 1994 as a joint venture between Oryx Energy, MangistauMunaiGas,
and the State Holding Company Zharkyn, and currently is operated by Royal Dutch Shell in a 50:50 joint venture with Lukoil.
The geology, crude composition, and production history of Arman is outlined, followed by a review of the field development,
contract structure, and operating and capital expenditures. An assessment of field profitability concludes the discussion.
相似文献
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