水体经济与旅游业融合发展机制研究

产业融合是当代社会经济发展并兼顾生态环境效益的有效途径。水的多功能性、人的亲水性、水的实用价值、美学价值、文化内涵使得水体与旅游具有天然的耦合性,水体经济为旅游业态和产品创新提供了新兴载体。水体经济与旅游产业融合涉及旅游与水电、水运、水游、水生、水岸经济的融合,可以采取"水辅旅"模式、"旅附水"模式、"水旅合一"模式、"综合发展"模式。在实践中,应注重突破体制机制、思想观念、生产要素等方面的约束,从规划、管理、技术、文化、产品上推进两者的深度融合。

联系国情 开拓创新——评《廖丹清选集》

廖丹清同志和我共事多年,我们也合作进行过一些科研项目。最近他将多年的成果选编成集,可喜可贺。选入集子的这些文章,有的我过去拜读过,有的是这次才看到的。通观这70多万字的巨作,大都是作者根据中国改革与发展的需要有的放矢的研究成果,是作者辛勤劳动。

Influence of stocking density on growth, body composition and energy budget of Atlantic salmon Salmo salar L. in recirculating aquaculture systems

Atlantic salmon Salmo salar were reared at four stocking densities--high density D1 （final density -39 kg/m^3）, medium densities DE （-29 kg/m^3） and D3 （~19 kg/m^3）, and low density D4 （-12 kg/m^3）- for 40 days to investigate the effect of stocking density on their growth performance, body composition and energy budgets. Stocking density did not significantly affect specific growth rate in terms of weight （SGRw） but did affect specific growth rate in terms of energy （SGRe）. Stocking density significantly influenced the ration level （RLw and RLe）, feed conversion ratio （FCRw and FCRe） and apparent digestibility rate （ADR）. Ration level and FCRw tended to increase with increasing density. Fish at the highest density D~ and lowest density D4 showed lower FCRe and higher ADR than at medium densities. Stocking density significantly affected protein and energy contents of the body but did not affect its moisture, lipid, or ash contents. The expenditure of energy for metabolism in the low-density and high-density groups was lower than that in the medium-density groups. Stocking density affected energy utilization from the feces but had no effect on excretion rate. The greater energy allocation to growth at high density and low density may be attributed to reduced metabolic rate and increased apparent digestibility rate. These findings provide information that will assist selection of suitable stocking densities in the Atlantic-salmon-farming industry.

From the Romantic Sea to the Sea as the Global Commons＂ Portrayals of the Waterbody in Longfellow, Melville, and Ian Wedde

This article discusses the representation of the sea in selected works of W. H. Longfellow, Herman Melville, and lan Wedde, tracing its transformation from a romantic icon to a global commons. Despite differences in their portrayals, all three artists find stagnation alongside vitality in the ebb and flow or the rolling of the sea. Similar to Longfellow, Melville romanticizes the sea in Moby-Dick as an ultimate sanctuary, the domain of reveries. At the same time, Melville also portrays the sea as a global commons where U.S. capitalism dominates the global order and exploits the resources. In addressing the environmental issues such as the possibility of whales＇ extinction, Melville echoes ＂the tragedy of the commons＂ lamented by Garrett Hardin. Queequeg, the ＂primitive＂ man who saves Ishmael from the wolfish industrial capitalism is thought to be modeled after a MAori from New Zealand. Today, the M^ori＇s ancestral sea-based culture is threatened by economic globalization. Wedde, a New Zealand poet, confronted the plans to construct an aluminum smelter in his country. His poem juxtaposes themes of precariousness and desolation with resilience and defiant survival, a motif mirrored in Longfellow＇s and Melville＇s portrayals of the sea.

Assessing seawater quality with a variable fuzzy recognition model

With the rapid development of the marine economy industry, human exploitation of marine resources is increasing, which is contributing to the growing trend of eutrophication and frequent occurrence of red tide. Accordingly, investigations of seawater quality have attracted a great deal of attention. This study was conducted to construct a seawater environmental quality assessment model based on the variable fuzzy recognition model. The uncertainty and ambiguity of the seawater quality assessment were then considered, combining the monitoring values of evaluation indicators with the standard values of seawater quality. Laizhou Bay was subsequently selected for a case study. In this study, the correct variable model for different parameters was obtained according to the linear and nonlinear features of evaluation objects. Application of the variable fuzzy recognition model for Laizhou Bay, water quality evaluation and comparison with performance obtained using other approaches revealed that the generated model is more reliable than traditional methods, can more reasonably determine the water quality of various samples, and is more suitable for evaluation of a multi-index, multi-level, nonlinear marine environment system; accordingly, the generated model will be an effective tool for seawater quality evaluation.

Classification of Country Patterns in the World Based on Their Levels of Economy and Emission Process of Greenhouse Gases

According to the authoritative data involving social economic indicators and greenhouse gas （GHG） emission from the international universal database, the levels and processes of economic development and GHG emission in major economic groups, nations and regions of the world are simultaneously analyzed. Obtaining Gross Domestic Product （GDP） and emission per capita from various countries and regions in the past 40 years as the standard, countries and regions in the world are divided into six groups： countries with low emission per capita and low economic level （IA）, countries with low emission per capita and medium economic level （IIA）, countries with low emission per capita and high economic level （IIIA）, countries with high emission per capita and medium economic level （liB）, countries with high emission per capita and high economic level （IIIB）, countries with high emission per capita and low economic level （IB）. Countries belong to IB are quite rare in the study period, while the first five groups correspond to the poor regions, main developing countries, economically transitional countries with rapid economic development, rich islands and developed North America and Europe respectively. Data analysis shows that there is a close relationship between emission and economic development of different countries and regions. The composition relationship between economic development of different countries and regions is relatively stable over a long period of time. From 1970 to 2005, rising trends existed in the economic development of most countries and regions. However, the emission had a significant increase in a small part of countries and regions. In other words, for those with high emission, the emission level is always high. But for those with low GHG emission, the emission does not increase too much. The main processes of the change of countries pattern from IA to IIA and from II B to IIIB, occurring in the 1970s and from the late 1970s to the 1980s respectively. That result has .a significant enlightening effect in understanding the relationship between emission and eco- nomic development and its historical process of various countries and in choosing the position of our country in the future climate diplomatic negotiations.

An Analysis of Wetland Degradation in the Dimoria Region of Assam, India

The wetlands of the Brahmaputra valley include lake-like natural water bodies locally known as ＇beel＇, and degenerated lakes, which are often called as swamps. The role of such wetlands in socio-economic condition of the people is significant from various angles. Apart from the wetlands act as the ideal habitats for feeding, nesting and breeding of a large variety of fishes, birds and other aquatic animals, these features maintain the environmental quality of the region. Present study has been conducted primarily in eight selected beels in the Dimoria region, which is located almost at the south-central part of the Brahmaputra valley. The water and soil samples from these wetlands had been collected using random sampling technique and analyzed to know about the nature of degradation of the wetlands. Once highly productive wetland waters now show very low DO, high BOD and COD, indicating dwindling productivity of fish and other aquatic resources. Higher value of pH in soils of most of the wetlands found probably due to the impact of industrial effluents and urban sewage and use of chemical fertilizers in the paddy field of the fringe areas, which again create toxic environment and ultimately reduces fish productivity.

Analysis on the Level of Intra-industry Trade for ASEAN＇s Economy

This paper aims to examine and analyse the level of intra-industry trade on economy of ASEAN. These data obtained from the accurate and reliable source of ASEAN Trade Statistics databases. The importance of intra-industry and measurement is also described. Moreover, the linkage of intra-industry trade and investment liberalization under the ASEAN Economic Community （AEC） is also explained. The effective enhancement schemed to increase the competitiveness of specific industries had been proposed to enhance ASEAN to be efficient production hub and network of region that lead to the ultimate goal of single market. The further studies can be applied to construct and estimate the econometric model and forecasting technique to confirm the empirical results.