广东省海洋捕捞产量灰色预测   总被引：2，自引：0，他引：2  

陈文河  梁振林 《海洋水产研究》2006,27(5):74-78

为摸清今后海洋捕捞业的发展动态,以广东省海洋与渔业局提供的1996～2003年广东省海洋捕捞业统计数据为基础,分别建立灰色预测模型,通过模型对广东省海洋捕捞业发展趋势做出了近5年预测。预测结果,2010年海洋捕捞产量在167×104t,南海的捕捞产量为156.78×104t,远洋渔业产量为19.82×104t。通过对预测结果的可信度进行分析,进一步确定这种分析结果的合理性,从而为确定今后广东省海洋捕捞业发展方向,渔业生产部门制订投资决策和合理安排生产提供科学依据。  相似文献   

浙江水产养殖环境中铬的形态分析和污染情况调查          下载免费PDF全文

刘琴  石群  王范盛  顾捷  祝银 《现代农业研究》2020,(5):92-93

本文对浙江省池塘养殖、滩涂养殖、浅海筏式养殖、工厂化养殖和网箱养殖等典型养殖模式 环境中铬的污染情况进行抽样调查,根据本单位开发方法对总铬和有效态铬中的两种价态铬进行测 定。结果表明,我省水产养殖环境中,水质中总铬和毒性较大的Cr6+含量较小,均在《生活饮用水卫 生标准》（0.05mg/L）限量标准以下,未发现超出渔业水质标准的情况。  相似文献   

浙江大盘山国家级自然保护区野果资源食用开发价值评价     

王盼  刘亚  周钰鸿  王康民  陈子林 《中国农学通报》2020,36(25):26-31

为对野果资源的食用开发提供评价和筛选依据,应用层次分析法构建野果资源食用开发价值综合评价模型,并对浙江大盘山国家级自然保护区常见的40种可食用野果进行评价和筛选。结果表明,野果资源食用开发价值的标准层指标的综合权重值为风味口感(0.2674)>营养保健(0.1245)>贮藏难度(0.0884)>结果产量(0.0733)>适应能力(0.0658)>驯化技术(0.0658)>观赏价值(0.0590)>资源储量(0.0442)=新颖程度(0.0442)>产品卖相(0.0368)=食用风险(0.0368)>繁育特性(0.0329)>采食时间(0.0314)>药用价值(0.0295)。经筛选,三叶木通(Akebia trifoliata)、南五味子(Kadsura japonica)、蓬蘽(Rubus hirsutus)等5种野果被评为I级开发利用对象;插田泡(Rubus coreanus)、木通(Akebia quinata)、中华猕猴桃(Actinidia chinensis)等14种野果被评为II级开发利用对象;北枳椇(Hovenia dulcis)、君迁子(Diospyros lotus)、珍珠栗(Castanea henryi)等9种野果被评为III级开发利用对象;高梁泡(Rubus lambertianus)、野山楂(Crataegus cuneata)、山樱花(Cerasus serrulata)等12种野果被评为IV级开发利用对象。  相似文献   

湛江地区野生蔬菜资源的开发与利用     

汪云 《广东农业科学》2006,(8):5-7

湛江市地处热带北缘,背陆面海,有丰富的热带、亚热带野生蔬菜资源,据统计共有93科210多种,其中蕨类植物9科10种、种子植物60科153种、菌类植物10科21种、藻类植物18科26种。野生蔬菜具有抗逆性强、无污染、营养价值高和医疗保健作用等特点,湛江市的野生蔬菜资源开发利用前景广阔,建议扩大宣传,建立野菜生产基地和开发研究野菜系列保健食品。  相似文献   

我国内陆水域增殖渔业发展存在的问题     

管卫兵  杨红 《海洋水产研究》2005,26(3):80-85

我国内陆水域渔业是我国渔业发展的重要内容,内陆水域增殖渔业经过多年的发展,取得了很大的成绩,但是在发展过程中也表现出多种问题,如增殖品种不合理,不重视遗传多样性的保护。本文对这些问题作具体的分析,同时提出相应的对策。  相似文献   

Assessing spillover from marine protected areas and its drivers: A meta‐analytical approach     

Manfredi Di Lorenzo  Paolo Guidetti  Antonio Di Franco  Antonio Cal  Joachim Claudet 《Fish and Fisheries》2020,21(5):906-915

Overfishing may seriously impact fish populations and ecosystems. Marine protected areas (MPAs) are key tools for biodiversity conservation and fisheries management, yet the fisheries benefits remain debateable. Many MPAs include a fully protected area (FPA), restricting all activities, within a partially protected area (PPA) where potentially sustainable activities are permitted. An effective tool for biodiversity conservation, FPAs, can sustain local fisheries via spillover, that is the outward export of individuals from FPAs. Spillover refers to both: “ecological spillover”: outward net emigration of juveniles, subadults and/or adults from the FPA; and “fishery spillover”: the fraction of ecological spillover that directly benefits fishery yields and revenues through fishable biomass. Yet, how common is spillover remains controversial. We present a meta‐analysis of a unique global database covering 23 FPAs worldwide, using published literature and purposely collected field data, to assess the capacity of FPAs to export biomass and whether this response was mediated by specific FPA features (e.g. size, age) or species characteristics (e.g. mobility, economic value). Results show fish biomass and abundance outside FPAs was higher: (a) in locations close to FPA borders (<200 m) than further away (>200 m); (b) for species with a high commercial value; and (c) in the presence of PPA surrounding the FPA. Spillover was slightly higher in FPAs that were larger and older and for more mobile species. Based on the broadest data set compiled to date on marine species ecological spillover beyond FPAs' borders, our work highlights elements that could guide strategies to enhance local fishery management using MPAs.  相似文献   

An ecosystem-based assessment of the Korean blue crab trammel net fishery in the Yellow Sea and management implications     

Inja Yeon  Mi Young SongMyoung Ho Sohn  Hak Jin HwangYang Jae Im  Do Hoon KimHee Won Park  Chang Ik Zhang 《Fisheries Research》2011,112(3):179-188

Landings in the blue crab, Portunus trituberculatus, fishery in Korean waters of the Yellow Sea have declined substantially from 11,000 t in the 1980s to 2,300 t in 2004. Blue crab habitat quality in the Yellow Sea has been degraded by anthropogenic activities including sand mining, land reclamation, and coastal pollution. Various traditional management measures have been implemented, including closed seasons during spawning and size limits, but these measures alone have been unsuccessful to conserve blue crab stocks. Consequently, a total allowable catch and a stock-rebuilding program using an ecosystem-based management approach were implemented in 2003 and 2006, respectively to rebuild blue crab stocks and restore habitats. This program involved assessment of both blue crab stock status and trammel-net fishery impacts at an ecosystem-level using an ecosystem-based fisheries assessment method ( [Zhang et al., 2009] and [Zhang et al., 2010]), which considered fishery data from catch and effort time-series, crab population biology, and ecosystem characteristics, including habitats and environmental conditions. Recent (2008) management status indices have shown significant positive change compared to conditions in 2000 with respect to sustainability of the stock and fishery and with regards to biodiversity and ecosystem habitat quality.  相似文献   

Sea turtle by‐catch in the Mediterranean     

Paolo Casale 《Fish and Fisheries》2011,12(3):299-316

Sea turtle by‐catch data in the Mediterranean were reviewed and analysed with fishing effort. The results indicate over 132 000 captures per year, with probably over 44 000 incidental deaths per year, while many others are killed intentionally. Small vessels using set net, demersal longline or pelagic longline represent most of the Mediterranean fleet and likely cause more incidental or intentional deaths than large vessels typically using bottom trawl or pelagic longline. When interactions, mortality, intentional killing, size (a proxy for reproductive value) and turtle populations are considered, results indicate that Mediterranean green (Chelonia mydas) and loggerhead turtles (Caretta caretta) are more affected (i) by fishing gears such as bottom trawlers, demersal longlines and set nets, (ii) by small‐scale fisheries, and (iii) by fishing in the eastern basin. Although small‐scale fisheries should be the priority target, available measures are easier to implement on the fewer large vessels. Moreover, these measures are few, and they are not implemented yet, while others should still be tested for the Mediterranean fisheries. Thus, measures for reducing captures or mortality through changing gear‐specific characteristics may help, but probably a more holistic conservation strategy aimed to an ecosystem‐based fishery management for a sustainable fishing would be the only solution for the long‐term survival of Mediterranean Sea turtle populations and their habitats. Small‐scale fisheries should manage marine resources, including turtles, in a responsible and sustainable way. Turtles may not only benefit from but can also help this process if their non‐consumptive value is fully recognized.  相似文献   

日本渔业概况     

李励年 《现代渔业信息》2012,27(2):157-165

日本是全球重要的渔业国家。本文介绍了日本的渔业生产、渔业资源、渔业在国民经济中的地位、渔业管理以及渔业劳动力和经营状况。日本渔业以海洋捕捞为主,由于全球渔业资源衰退,国际竞争加剧以及日本国内经济的持续低迷,日本渔业在经历了上世纪80年代的鼎盛期之后呈现大幅下降趋势,面临着产业结构调整的巨大压力。  相似文献   

The pelagic habitat analysis module for ecosystem‐based fisheries science and management          下载免费PDF全文

Daniel P. Harrison  Michael G. Hinton  Suzanne Kohin  Edward M. Armstrong  Stephanie Snyder  Frank O'Brien  Dale K. Kiefer 《Fisheries Oceanography》2017,26(3):316-335

We have developed a set of tools that operate within an aquatic geographic information system to improve the accessibility, and usability of remote‐sensed satellite and computer‐modeled oceanographic data for marine science and ecosystem‐based management. The tools form the Pelagic Habitat Analysis Module (PHAM), which can be applied as a modeling platform, an investigative aid in scientific research, or utilized as a decision support system for marine ecological management. Applications include fisheries, marine biology, physical and biological oceanography, and marine spatial management. The GIS provides a home for diverse data types and automated tools for downloading remote sensed and global circulation model data. Within the GIS environment, PHAM provides a framework for seamless interactive four‐dimensional visualization, for matching between disparate data types, for flexible statistic or mechanistic model development, and for dynamic application of user developed models for habitat, density, and probability predictions. Here we describe PHAM in the context of ecosystem‐based fisheries management, and present results from case study projects which guided development. In the first, an analysis of the purse seine fishery for tropical tuna in the eastern Pacific Ocean revealed oceanographic drivers of the catch distribution and the influence of climate‐driven circulation patterns on the location of fishing grounds. To support management of the Common Thresher Shark (Alopias vulpinus) in the California Current Ecosystem, a simple empirical habitat utilization model was developed and used to dynamically predict the seasonal range expansion of common thresher shark based on oceanographic conditions.  相似文献