中国远洋鱿钓渔业的发展前景

中国远洋鱿钓渔业起步较晚,目前基本上掌握了日本海和西北太平洋鱿钓渔场的形成机制、钓捕技术。远洋鱿钓渔业已成为中国海洋渔业的一大支柱产业。为确保我国鱿钓渔业的持续发展,本文提出了开发新的资源、加强宏观管理和注重加工业发展等建议和对策     

中国鱿鱼生产及进出口贸易分析

鱿鱼是头足类中最重要的经济资源之一,中国鱿鱼的产量年际间波动较大,但也不乏独特的特征和规律,这对本国贸易的稳定和发展有着直接或者间接的影响。本文主要是对在对目前中国鱿鱼的生产和贸易两方面概述的基础上,着重剖析中国鱿鱼的生产供给和贸易状况。通过收集的数据信息,采用分析统计法,对中国鱿鱼不同种类的资源状况、国际生产中的地位以及进出口贸易的主要结构格进行研究,从而对目前中国鱿鱼市场的状况做整体的窥探和了解,并且针对其中存在的问题从拓展国内市场和优化进出口市场的角度提出相应的建议。     

CDN网络关键技术研究及应用

CDN（内容分发网络）,Content Delivery Network的简称,CDN是新兴信息化网络之一,它是在IP网络上搭建而来的,它可以有效地为访问大中型网络的提速,有效地提高工作效率,强化网站信息和数据的安全,并且能够节约网站流量和有效控制成本,提高客户终端的满意度。对服务器配置文件的管理是CDN的运维的关键。     

A bioeconomic model for Hooker’s sea lion bycatch in New Zealand*

The New Zealand Ministry of Fisheries constrains the incidental capture of Hooker’s sea lions in trawl nets of the southern squid fishery by closing the season once an upper limit on sea lion deaths is reached. The regulatory measure is in fact a limit on effort because the number of sea lion deaths is calculated from an estimated mortality rate per standard unit of effort measured in tows. During recent years, vessels have been observed to increase the median time per tow, suggesting that the industry is expanding the capacity of an unregulated input in response. This paper formalises the current situation analytically by constructing a bioeconomic model that captures the idiosyncrasies of the squid fishery and the imposed regulation. Reducing the regulatory constraint to an isoperimetric problem can show how the current management regime may skew incentives leading to the observed increase in tow time. An extension to the current regulatory framework by introducing a spatial dimension to the estimated sea lion mortality rate may lead to more efficient behaviour. Despite retaining an upper limit on sea lion deaths, the profit‐maximising squid industry is given the incentive to increase effort in areas of high squid density relative to sea lion density.