洞庭湖区淡水渔业发展现状和制约因素分析——以湖南南县为例

南县是湖南省高效渔业先进县,也是洞庭湖淡水渔业县的典型代表。改革以来,南县淡水渔业得到了快速发展。本文结合实际调研与历史数据,分析了南县淡水渔业发展情况,并从产业链环节分析了存在的问题,提出了加强养殖环节基础设施建设支持力度、加强技术培训、加快水产品批发市场和信息渠道建设、发展水产加工业、培育社会化服务组织、落实池塘使用权证等相关政策建议。     

浙江渔业发展与可持续发展研究

浙江是我国重点渔业省份,其发展海洋渔业经济具有得天独厚的经济区位优势,浙江渔业在全国具有举足轻重的地位。论文在回顾浙江渔业发展的历史进程并总结浙江渔业发展取得的成绩与经验基础上,探讨了浙江渔业发展规律,提出浙江渔业可持续发展的战略选择。     

金融危机以来我国沿海港口货物吞吐量影响因素研究——兼论我国经济由外需拉动向内需驱动转型的一个证据

通过建立基于贸易引力模型的我国沿海港口货物吞吐量影响因素的VAR模型,分别考察了交通运输业固定投资、人民币汇率、世界经济状况和国内经济状况对我国沿海港口货物吞吐量的影响,并以金融危机以来的数据作为样本对该模型进行了实证检验。由脉冲响应和方差分解分析发现:世界经济发展状况对我国沿海港口货物吞吐量的影响最大,且世界经济的复苏将显著提高沿海港口货物吞吐量;交通运输业固定投资在经过一个滞后期后,也会对沿海港口货物吞吐量起到积极的作用;人民币汇率对我国沿海港口货物吞吐量的影响不可忽略,且汇率上升(即本币贬值)将提高沿海港口货物吞吐量;而国内经济发展状况则与我国沿海港口货物吞吐量之间并不存在显著的确定关系,这或表明我国经济的发展方式正由外需拉动向内需驱动转型。     

南沙海洋渔业发展面临的挑战及其对策

南沙海域水产资源极其丰富,是我国最大的热带渔场,自20世纪80年代中期恢复渔业生产以来,南沙现代渔业得到了快速发展。然而,南沙的渔业生产也面I瞄渔业资源遭掠夺、渔业生产条件恶劣、涉外事件频发和渔业执法护航力量薄弱等诸多问题和挑战。为使南沙渔业又好又快发展,必须从思想认识、组织形式、管理制度、基础设施和政治努力等方面来采取相应对策。     

我国海洋渔业生态失衡机制与修复研究

本文在构建评价指标体系的基础上,对我国海洋渔业生态环境进行了综合评价,认为我国海洋渔业生态面临的失衡威胁正逐渐增强;并从自然和人为因素两个角度剖析了我国海洋渔业生态失衡的内在机理,并结合有关研究成果,构建了我国海洋渔业生态修复技术体系;最后,提出了防治我国海洋渔业生态失衡态势恶化的具体途径与措施。     

定西市渔业产业现状分析及发展策略探索

改革开放以来,定西市渔业取得了长足发展。论文分析了定西市渔业在地理区位、水资源和鱼类资源具有的优势,认为定西市渔业发展具有较大潜力和丰厚的产业优势;在分析定西市池塘养殖、水库和塘坝养殖、特色养殖以及休闲渔业等产业发展现状的基础上,为进一步发挥当地优势,推进定西渔业又快又好发展,论文提出了开发与保护并举、创新机制体制、强化服务体系等发展策略。     

山东省海岛渔业板块空间布局及发展模式分析

海岛渔业是山东省海洋渔业的一个重要组成部分,由于山东海岛布局分散,发展模式混乱,海岛渔业生产效率低下。重构海岛渔业板块的空间布局,根据海岛空间特征重新配置渔业资源,创新渔业发展模式,对海岛的空间结构和产业结构进行整合,已经成为山东省海岛渔业可持续发展的重要路径。需从提升综合效益、完善基础设施、重构开发次序等角度对海岛渔业板块进一步优化。     

Rooted in Place: Understanding Camper Substitution Preferences

This study examines recreationists using primitive roadside campsites on Forest Preserve lands in the Adirondack Park. The primary objective of this study was to explore psychological factors (experience use history, enduring involvement, place bonding) that contribute to visitors’ substitution preferences and their willingness to make a resource substitution for roadside camping in the Adirondack Park. Two discriminant function analyses indicate that experience use history variables and the rootedness dimension of place bonding can significantly discriminate between substitution preference groups and willingness to substitute for roadside camping. Enduring involvement in the activity of camping, however, was not a significant predictor of substitution variables.     

Risk factors associated with life jacket wear among adult canoeists and kayakers in the United States, 1999–2017

Abstract

Drowning is the most common cause of death in recreational boating. Life jackets prevent drowning, yet adult wear rates remain relatively low on most types of boats. Canoes and kayaks are among the least used boat types, yet maintain the third and first highest annual boating-related drowning rates in 2012, respectively. This 1999–2017 study collected data from 124 study sites across the US. Life jacket wear was calculated for 13 dichotomized risky and non-risky variables, using Chi-square tests. A count variable based on number of risks was created, and Cochran-Armitage trend tests examined linearity in life jacket use. Three illustrative variables for each boat type were represented in tree diagrams. Kayakers had higher wear rates than canoeists among all variables observed. For both boats, the majority of risky conditions had higher life jacket wear rates than their non-risky alternatives. As the number of risks increased, life jacket wear rate increased. Boaters seemingly conduct a mental assessment of risk to determine whether to wear a life jacket.