大连市发展滨海休闲渔业的资源分析和对策

休闲渔业作为旅游业与渔业的交叉产业,90年代初在西方国家迅速兴起。大连是全国著名的海滨旅游城市,休闲渔业的发展必须定位于"海"。本文在解析休闲渔业特点的基础上,指出大连市发展滨海休闲渔业利于调整渔业结构,拓宽城市旅游新领域,改善城市环境质量等。同时从休闲渔业资源、客源市场等方面分析了发展滨海休闲渔业的优势,透析了目前存在的"弱视"、"短视"、"缺位"问题,并提出营造宣传氛围、加强渔业与旅游业的联系等5项因应对策。     

沿海铁路建设与苏北鲁南地区的发展

交通条件的改善对支撑区域经济发展和构建最优的空间结构起着重要的作用,其中各种交通方式的优化组合和区域发展主轴线的构建对驱动区域经济的快速发展更有着决定性的意义。本文以苏北和鲁南地区为例,借沿海铁路建设带来的发展契机,通过对该地区交通网络演变规律和发展现状的分析,探讨了当前制约该地区发展的关键因素,并结合空间结构理论,给出了促进该地区经济发展的具体思路。     

西部民族地区图书馆的数字化信息资源建设

西部是我国少数民族聚居最多的地区,民族文化多姿多彩。西部民族地区图书馆深入开发西部民族文献资源,可以为这里的少数民族提供更好的发掘民族文化精髓以及相互交流、共谋发展的条件,为西部地区的经济和文化发展提供更有力的文献资源支撑,更好地服务于西部大开发战略。本文立足西部民族地区实际,提出了数字化信息资源建设的原则、思路及应处理好的几个问题。     

重点开发区域工业空间格局、集疏差异及影响机制——以福建沿海地区为例

以福建沿海地区为例,利用微观工业企业数据库,探究了重点开发区域工业空间演化、产业集疏差异及其形成机制。研究表明:福建沿海地区工业发展水平大幅提升且空间差距逐渐缩小,空间形态向成熟的产业带演进,产业空间分工表现出同质化特征;不同类型行业的空间集疏过程呈现出显著差异,其中资本密集型产业表现为持续扩散趋势;地形和生态可占性、资源环境承载力对产业空间形态具有基础性作用,地区经济技术是产业空间格局演化的重要驱动力,临港区位和交通条件改善不断促进产业发生空间集聚与扩散,区域发展战略以及产业政策为工业空间调整提供了具体方向。研究结论可为重点开发区域工业空间布局优化提供一定的借鉴。     

建国初期我国国防战略的转换——朝鲜战争与东南沿海防卫战略

建国初期 ,随着朝鲜战争的发展 ,我国国防战略在不断变化。本文着重论述了把以解放台湾为最终目标的积极进攻战略转为在东南沿海地区实行防卫战略的变化与积极防御战略形成的问题     

Archaeological evidence for the extinction of a breeding population of elephant seals in Tasmania in prehistoric times

Southern elephant seals, Mirounga leonina L., do not inhabit the northwest coast of Tasmania today, but archaeological evidence indicates that they did so in prehistoric times, when they constituted an important food resource to the Aboriginal tribes of the region. Skeletal remains of at least 300 elephant seals were present in one midden alone. There is distinct sexual dimorphism in the canine teeth of elephant seals, and regular seasonal variations in the density of concentric layers of calcified dentine, as well as the pattern of these variations, provide insight into the age and reproductive history of individual animals. The sectioned canine teeth of 145 southern elephant seals (107 females, 38 males) from a Tasmanian midden were examined to provide information on the age and sex of the seals as well as aspects of their reproductive history. The age distributions differed between the sexes, and partly explain the different frequencies of males and females. All the males were young, immature individuals, none more than 6 years old, which is about the age at which a secondary growth spurt occurs in males and results in a marked sexual disparity in body size. By contrast, 47% of the females were of breeding age, 26% had given birth to pups, and several were up to 20 years of age. At least 26% of animals were estimated to be less than 3 months old, the approximate age at which they go to sea for the first time, confirming that they were born on the northwest Tasmanian coast. Animals were killed throughout the year, and there is evidence of change in reproductive pattern over time, consistent with a response to predation pressure. The evidence points to the conclusion that the population was exterminated by Aboriginal hunters, through selective exploitation of smaller animals, which included significant numbers of breeding females. Copyright © 1999 John Wiley & Sons, Ltd.     

Hindcasting the Japanese Military Base on Midway Atoll (Central Pacific)

Abstract

The Battle of Midway (4–7 June 1942) was the turning point of World War II in the Pacific. Not only did the battle cost the Japanese Navy four of its fleet carriers, it also thwarted Japanese hopes of establishing a seaplane base there. Midway, in conjunction with another in the Aleutians, was to be the anchor of Japan’s eastern defence perimeter. Drawing on an analysis of the Japanese military base on Kiska (Aleutians) this paper reconstructs what equipment the Japanese had destined to be placed on Midway. A comparison with the well-documented Japanese bases on Micronesian atolls allows us to hindcast the appearance of a base that never was.     

Coastal Maya Obsidian Tool Use and Socio-Economy in the Late Postclassic-Early Spanish Colonial Period at San Pedro,Ambergris Caye,Belize

Microscopic use-wear analysis of the obsidian artifacts recovered from Late Postclassic-Early Spanish Colonial occupations at the site of San Pedro yields useful information for interpreting Maya socio-economic activities. Obsidian traded into the community was used for a variety of tasks with emphasis placed on subsistence and domestic manufacture associated with marine resources, including intermittent and contingent crafting. Trade in obsidian and marine resources likely provided San Pedro community members access to inland economic networks and enabled the acquisition of resources not found on the caye. Microwear on chert and obsidian tools indicates relative stability in the traditional lives of the San Pedro Maya in the 15th–17th centuries a.d. Although the San Pedranos likely suffered to some degree from coastal raiding and the introduction of epidemic diseases by the Spaniards, their off-shore location provided them some protection from the upheaval experienced by the Maya in mainland communities.     

Bipolar Reduction and Behavioral Variability During the Mid-Late Holocene at Eagle's Nest,Mount Sinai Harbor,New York

Recent syntheses for the Long Island Sound region argue for long-term cultural continuity amongst Holocene coastal hunter-gatherers. These notions derive primarily from studies of quartz lithic assemblages, which archaeologists argue show structural stasis over time. The remaining variability is explained with a ‘distance to source' model in which near-coastal sites tend to show a lack of quartz conservation while interior sites show quartz recycling. Under this model, technological strategies traditionally associated with raw material conservation (e.g., bipolar reduction) should not occur at near-coastal sites. We test the ‘distance to source’ model by reexamining a quartz lithic assemblage from Eagle's Nest-Long Island's richest Holocene coastal hunter-gatherer site. We find conclusive evidence for bipolar reduction in the site's “block/shatter” materials. Toolmakers used bipolar reduction to conserve raw material. Toolmakers also used anvils and bipolar reduction to open quartz cobbles, to stabilize freehand cores, to efficiently access cutting edges, and possibly to create crushed coarse quartz temper for pottery production. Our results point to previously unrecognized aspects of behavioral variability in the Eagle's Nest lithic assemblage and to possible revision of the ‘distance to source’ model. Similar variability may be present at other North American sites with quartz “block/shatter” material.     

Strongly aligned coastal boulders on Ko Larn island (Thailand): a proxy for past typhoon‐driven high‐energy wave events in the Bay of Bangkok

Recent studies of elevated carbonate boulder deposits on several rock islands near Bangkok have indicated that Thailand's capital city may not be as protected from typhoon strikes as previously thought. Here, new evidence is presented for past high‐energy wave (HEW) events in the form of statistically significant patterns of boulder alignment on exposed rocky shorelines of Ko Larn island. The long‐axis orientations of 193 coastal sandstone boulders were analysed across four study sites. Several scenarios for the unimodal, bimodal, and polymodal patterns found can be envisaged. Either the most recent HEW event was the strongest—in which case most clasts were rearranged unimodally (one observation site), or the strongest HEW event was earlier and subsequent weaker ones realigned only smaller boulders to produce bimodal or polymodal patterns (three observation sites). Inferred northeastward or eastward onshore flow directions are consistent with palaeo‐typhoons penetrating into the Bay of Bangkok on northwestward curving tracks. The calculated minimum flow velocities required to transport all sampled boulders are 5.5–7.8 m s^?1, similar to other findings throughout the Asia‐Pacific region. It was observed that the absence of a fitted boulder geomorphology lends credence to the earlier proposed time frame of 150–200 years between typhoon phases in the upper Gulf of Thailand. The current work has provided additional insights into the characteristics of past HEW events that have a possibility of reoccurring again at some time in the future. Our findings continue to raise awareness for a reassessment of the risks of coastal hazards for the Chao Phraya River delta and densely populated Bangkok, for which storm surge modelling should be an urgent priority, so as to give better perceptions on how typhoon‐driven marine incursion would impact the city.