Socio-economic,operational and technical characterisation of the harvesting of gooseneck barnacle (Pollicipes pollicipes) in SW Portugal: Insights towards fishery co-management     

《Marine Policy》2017

The present study characterised the socio-economic, operational and technical aspects of harvesting the gooseneck barnacle (Pollicipes pollicipes) along the southwestern coast of Portugal. For this purpose, face-to-face interviews were conducted with commercial harvesters of the two most representative fishery associations (covering 51% licensed harvesters) in the area of the Parque Natural do Sudoeste Alentejano e Costa Vicentina. Based on traditional ecological knowledge, this study confirmed the local importance, ancestral character and family traditions of this activity, which constitutes the exclusive occupation of nearly half of the interviewed harvesters and an important source for household incomes. In addition, data was also gathered on preferential fishing zones, harvesting effort and duration, daily catches and selling prices. The main concerns, problems and difficulties experienced in this activity relate to the excessive number of recreational harvesters, creating problems at the levels of exploitation, commercialisation, management and inspection. The study further confirms the rising interest and involvement of the commercial harvesters in enhancing the competences of the local fishery associations. In particular, local harvesters want to encourage the development of a co-management system comprising spatial-temporal measures to avoid conflicts of use over space and resources, as well as innovative marketing strategies to improve the recognition, value and traceability of the shellfish. Overall, the information gathered is most valuable for adopting an alternative approach based on the cooperation and co-responsibility at local and regional levels, involving the stakeholders in the proposal of management measures adapted to the specificities of this area, activity and resource.  相似文献   

多模态数据的地质图关联网络构建及知识服务     

邱芹军  段雨希  田苗  吴麒瑞  马凯  陶留锋  谢忠 《地质论评》2024,70(2):2024020022-2024020022

地质图件及其附属资源（如描述文本）作为地质知识的重要存储媒介,蕴含着大量的地学知识及专家经验知识及隐式知识。快速精准地对多模态地质数据进行知识规范化定义、形式化表达、语义化关联和精准化推理是目前地学知识抽取及挖掘的前沿。当前,海量的地学数据中图件及附属描述信息知识分布零散,图件中的信息无法有效地与描述信息进行关联并提供知识服务。本文以多模态地质数据为数据源,建立了多源数据驱动下的地质图知识表达模型,通过地质基础知识、规则知识及决策知识来表达图件中蕴含的显隐式地质知识,从语义、空间、属性三个维度表示地质对象间的关系;并基于领域知识针对地质图件及描述信息开展了地质实体及关系的精准抽取及存储研究,最后以江西省于都县银坑幅G50E011007图幅150000矿产地质调查矢量数据为例进行了验证与分析,实验结果验证了本文所提出的知识表达模型及知识抽取方法, 能够较好地解决地质知识建模中图文关联弱、知识挖掘不充分等问题。  相似文献   

基于CiteSpace的粤港澳研究脉络可视化分析     

张宇星  李贵才 《热带地理》2021,41(1):177-189

利用文献计量和可视化工具CiteSpace,对1988—2020年粤港澳研究从科研机构、学者合作等横向特征以及文献数量演化、研究领域及研究热点迁移等纵向特征进行分析.研究发现:1)科研机构类型多样,以中山大学、暨南大学、广东外语外贸大学等高校为主导,且集中于广东省内;机构间初步形成合作关系网,但合作强度不高.2)个别学...  相似文献   

基于文献计量的波浪能领域研究态势分析          下载免费PDF全文

杨照  吕阳  马良 《海洋科学》2023,47(8):33-48

以Web of Science数据库中收录的主题为波浪能文献数据为研究对象，利用文献计量与知识图谱可视化分析方法，梳理波浪能领域研究趋势、科研力量布局，分析主要涉及学科方向和学科交叉情况，构建领域监测指标和前沿热点剖面，挖掘领域演进脉络与高被引关键文献，分析全球波浪能研究领域研究动态、前瞻热点及未来趋势，为波浪能发展提供参考。研究发现：波浪能领域科研论文体量及被引量整体呈逐步上升趋势，经历初步发展、繁荣发展和深化发展的阶段，涌现一批核心文献与著者，团体化纵深协作趋势尚待强化，亟需多学科深度融合。英国、葡萄牙等欧洲国家发展领先，研究机构方面普利茅斯大学、里斯本大学优势明显。该领域热点主要集中在波浪能转换装置、波浪能资源评估、振荡水柱波能转换、波浪能多能互补及环境相互作用。与风能等新能源多能互补和组合式联合发电、与其他海上结构耦合开发成为重要发展方向。  相似文献