我国大麻哈鱼资源及其保护途径

大麻哈鱼是我国黑龙江和吉林两省特产的经济鱼类，近２０年来资源明显衰退．本文根据多年一系列实地调查研究，论述了目前我国境内３种大麻哈鱼的自然分布、经济价值、资源特征与现状，分析了资源衰退原因及其开发利用中所存在的问题，初步提出资源保护途径。     

我国大兴安岭北部鱼类资源现状

根据１９９０－１９９４年调查结果表明,我国大兴岭北部现有淡水鱼类计７目５亚目１４科,１４亚科４７属６８种,其中经济鱼类２２种。与８０年代初期相比,有８目２亚目１０科２亚科２９属３３种鱼类未采集到标本,经济鱼类资源少了１７种。     

海洋药用鱼类资源的开发与利用

介绍了100多种海洋药用鱼类资源的名称、在我国的分布、药用部位、主治疾病等，同时讨论了它们的特点和利用途径，为合理利用海洋药用鱼类资源提供了重要的依据。     

曲阜地区资源土壤动物调查初报

本文报导了曲阜地区资源土壤动物现状，根据其经济用途，将它们分为食用土壤动物、药用土壤动物、天敌土壤动物和环境指示土壤动物的四大类，并论述了资源土壤动物的开发利用与保护。     

排泄资源与排泄资源经济研究

在论述排泄资源与排泄资源经济概念框架的基础上，全面系统地分析了研究排泄资源与排泄资源经济的重要意义，并从明确排泄资源经济研究的任务、内容与方法，以及坚持把学会学术活动当作学会事业来办等方面，提出了排泄资源与排泄资源经济研究的主要对策。     

松嫩平原的乌鳢资源

乌鳢是松嫩平原渔业湿地的经济鱼类之一。根据近年来的调查研究,本文论述了该区乌鳢的资源特征,分析了乌鳢在渔业资源中的作用和在湿地渔业开发中的地位,提出资源开发利用及其保护措施。     

烟台旅游资源的合理开发利用

烟台市地处胶东半岛的中西部，南北两面濒临大海，东接威海，西接潍坊与青岛。特殊的地理位置和悠久的历史文化造就了烟台市得天独厚的旅游资源、雄厚的经济实力和发达的社会文化事业，为旅游资源的开发创造了良好条件。近年来，烟台旅游业有了长足的发展，但在开发过程中仍存在着不少问题．主要表现在：①区域总体开发不够，旅游资源的开发集中在少数风景名胜点上。北部沿海旅游区资源优势明显，开发利用好．而南部、西部沿海旅游区和中部山地旅游区的旅游资源开发受交通、服务设施等条件限制，开发程度低，资源浪费现象严重。②旅游资源开…     

沱江鱼类资源及渔业问题

沱江水系的鱼类过去曾有过许多报道。四川省长江水产资源调查组(1975)对下游鱼类资源进行过调查,其余绝大部份均系分类方面的研究,而对资源和渔业利用研究甚少。作者于1980～1984年对该水系的鱼类资源进行了较系统的调查,本文仅扼要报道沱江鱼类资源和渔业利用概况。     

珠海市社会经济发展与资源环境的协调度分析

经济与资源环境协调发展成为研究热点，众多学者运用不同的数学方法对区域经济和环境的协调度进行了分析。目前这方面的研究仅包括经济和环境两大系统，未将社会发展作为独立的系统，且指标的选取未能体现区域经济发展的特点。根据珠海市的实际，对原有的协调度计算方法进行适当调整，得出珠海市社会经济发展与资源环境协调度发展的状况属于良好协调发展类中的经济滞后型。     

长薄鳅研究现状及保护对策

本文概述了长薄鳅研究现状及资源现状，分析了长薄鳅资源衰竭的原因，并结合研究现状，提出了加强渔业管理、合理调整禁渔制度、加大保护区建设、开展鱼类人工繁殖放流等保护对策。     

长白山区中国林蛙资源及其保护与增殖

中国林蛙主要产于我国的长白山区,具有较高的经济价值。本文根据近年来的生产实践和调查研究资料,着重介绍了吉林省长白山区的中国林蛙养殖生物学特征,提出了在该区的资源保护途径与增殖措施     

盐碱湿地鲇鱼资源及其增养殖

鲇鱼是松嫩平原盐碱湿地重要的高值食用鱼类之一。根据近年来对新荒泡鲇鱼的研究,作者报道了其生物学特征、经济价值、资源利用现状及其对新荒泡渔业资源的影响,提出了鲇鱼的增养殖途径及其关键技术。     

The ecological traces of growth: economic growth,liberalization, increased consumption—and sustainable urban development?

Using the development of the building stock and physical infrastructure as an example, this article highlights the difficulties in combining continuous economic growth in wealthy countries with the requirements of environmentally sustainable development. There are clear limits as to how far we can get by means of ‘eco-efficiency’, and the effect of a transition to less environmentally harmful types of consumption is not sufficient if the consumption volume keeps on increasing. This is particularly evident for societal processes such as the construction of buildings and the development of physical infrastructure. Increased consumption is both a result of and a precondition for economic growth. The development of the building stock and physical infrastructure in cities is a case showing that economic growth—at any rate, in the longer term—can hardly be consistent with the preservation of species, ecosystems and food-production resources. The growth in the building stock also makes it increasingly difficult to limit energy use and reduce carbon–dioxide emissions. Copyright © 2001 John Wiley & Sons, Ltd.     

Use of system dynamics for proper conservation and recycling of aggregates for sustainable road construction

A significant amount of mineral aggregates are used in constructing, rehabilitating and maintaining roads. As local (nearby) quarries get exhausted, aggregates need to be hauled from sources that are at ever-greater distances. Hence, over time the cost of trucking as well as the amount of emissions generated by trucking increases with a decrease of local natural aggregate stocks. The objectives of this study are to construct and utilize a system dynamics model of the depletion of a stock of natural aggregates due to pavement construction and maintenance, and determine the effect of using local and nonlocal aggregates, recycling and project cancellation (slowing growth) on the paving of roads. Long-term simulations are carried out with available aggregate stock, trucking distance and cost data. The quality of roads and a sustainability score, based on engineering, economic and environmental factors (emissions) are evaluated for different scenarios. An optimal combination of the use of local and nonlocal recycled aggregates, recycling and project cancellation is recommended. The proposed system dynamics model could be utilized by agencies to plan for the proper utilization of aggregate resources for road development and maintenance/rehabilitation projects.     

菹草的经济价值及其栽培与养鱼技术

菹草是渔业水域生态系统中的初级生产者，为渔业生产的重要自然资源之一、根据近年来的试验研究成果，本文探讨了菹草的自明、药用、饲用价值及其在渔业水域中对自然国类资原的增殖与保护作用，介绍了菹草人工栽培与养鱼的技术措施。     

盐碱湿地青虾资源及其增养殖

青虾是松嫩平原盐碱湿地重要的渔业生物资源 ,具有一定的渔业经济价值。以新荒泡为例 ,介绍了青虾的生物学特征、资源利用现状及其增殖途径 ,提出了青虾的池塘、稻田与网箱养殖的模式及其主要技术措施。     

Scarcity of natural resources and the implications for sustainable development

The idea of sustainable development has much popular appeal, but conflicts with centuries of economic theory about how limited land and natural resources constrain the growth of economies and populations. Much of that doctrine, especially that in the Malthusian tradition, is contradicted by historical experience, but the modern threat of environmental degradation raises new questions about whether growth can be sustained. Many of those new problems result from biases in economic organization and institutions against so-called environmental resources. Marketed resource commodities like minerals and timber are protected by the incentives of owners and suppliers to conserve them, enhance them and find new sources, and by the incentives of users to economize on their demands and find cheaper substitutes. Together, these forces have been sufficient to offset depletion and render resources less scarce over time. The same forces are not at work on environmental resources like water and air, so they are over-used and degraded as demands grow. However, promising opportunities exist to develop property rights and economic incentives to encourage users of environmental resources to protect and husband them, and these are likely to be more effective in harmonizing economic activity with the environment than purely regulatory policies.     

川西北两栖爬行动物资源及其利用与保护

川西北地区位于青藏高原东南部,现有两栖爬行动物67种(亚种),其中两栖类28种,爬行类39种;珍稀、濒危种约占22.4%,经济意义大、有利用价值的种占29.8%,经济意义一般的种占47.8%。这些动物在科研、工艺、药用、维护生态平衡等方面均有一定意义。本文对这些动物的利用现状作了评价,并对资源保护提出5点建议。     

九峰山地区的生物资源及其保护

九峰山地区天然植被保存完整,动植物资源颇为丰富。该区有维管束植物82科302属596种;陆栖脊椎动物134种,其中兽类25种、鸟类100种(另有2亚种)、两栖和爬行类7种、鱼类2种。蒙古扁桃和黄芪为国家三类保护植物,青羊和雪豹为国家二类保护兽类,金雕等13种鸟为国家二类保护鸟类;另外还有其它用途的经济动、植物。