Article 40 for developing waste hills , land or beachland whose use rights have not been ascertained for crop cultivation , forestry , animal husbandry or fisheries , the use rights may be given to developers or individuals for long - term use with the approval of the people ' s government at and above the county level according to law 第四十条开发未确定使用权的国有荒山、荒地、荒滩从事种植业、林业、畜牧业、渔业生产的，经县级以上人民政府依法批准，可以确定给开发单位或者个人长期使用。
Article 17 the competent authority shall , in making an overall planning with respect to fishery rights to fish in public waters , take into consideration the fish production resources and refer to the minerals prospecting , navigation , irrigation , environmental protection and other public interests and shall prepare and publish relevant plans from year to year as well as accept applications for fishery rights 第17条(公共水域之渔业权渔业之整体规划等)主管机关应依据渔业生产资源，参考矿产探采、航行、水利、环境保护及其他公共利益，对公共水域之渔业权渔业作整体规划，并拟订计画，每年定期公告，接受申请。
Using cd , cu , zn and cr as experimental toxicants and crucian as experimental creature , we employed the environmental biotechniques ( flame atomic absorption spectrophotometry , the method of improved pyrogallol autoxidation and electron microscopy ) to study the acute toxicity and secure concentrations of heavy metals to crucian ; the accumulation and distribution of mixed heavy metals to fingling crucian ; the activities of superoxide dismutase ( sod ) of gill and liver tissues and the hispathological and ultrastructural change of superfine structure of liver and kidney of crucian after cadmium exposure . through which , we intended to fully and systemically study the toxic influence of heavy metals to fish , and preliminarily discuss the influence of heavy metals pollution to the diversified level of fish such as individual , organ , tissue , cell and molecule . thus we tried to provide scientific evidence to establish preventative management measures , avoid and relieve the harm of heavy metals pollution to aquicolous ecosystem in time 随后以这几种重金属作为实验毒物，以鲫鱼为实验动物，应用环境生物技术、火焰原子吸收分光光度法、邻苯三酚自氧化法、透射电镜等技术研究了重金属cu 、 zn 、 cd和cr对鲫鱼的急性毒性及其安全浓度评价、混合重金属在鲫鱼幼体组织内的积累和分布、 cd对鲫鱼鳃和肝脏中sod活性的影响、 cd对鲫鱼肝细胞和肾细胞超微结构的影响等，全面和系统地研究了水环境中重金属暴露对鱼类的毒性影响，初步探讨了重金属污染对鱼类的个体? ?器官? ?组织? ?细胞? ?分子等各水平层次的影响，为制定渔业生产上预防性的管理措施提供科学依据，及时避免或减轻重金属污染对水生生态系统造成的损害。
In order to achieve this goal , this research will has the following four specific objectives : understanding the level of fish consumption in china and possible factors that affect the fish consumption ; developing a systematical modeling frameworks and complete demand system for food and fish demand study ; exploring the consumption behavior of both urban and rural consumers in china by estimating model of fish demand system and model of food demand system respectively , analyzing influence of various factors on the demand for fish and other foods quantitatively ; discussing the future change of aggregate amount and the structure of fish demand based on the result of the research , so as to provide basis for decision making in fishery production structure changes and rational utilization of fishery resources 本项研究的总目标是探讨影响水产品消费的各种因素，为预测未来水产品需求和生产结构调整提供依据。为达到这目标，本项研究分为以下四个内容：了解我国水产品消费水平和结构及其可能的影响因素；建立水产品需求系统模型；通过分别估计食物和水产品需求系统模型，探讨我国城乡居民消费行为，定量分析各种影响因素对水产品及其他食品需求的影响；根据研究结果，讨论未来水产品需求总量和结构的变化，为优化渔业生产和合理使用渔业资源提供政策依据。
