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2.
It was realized that with the increasing rate of deterioration of fisheries resource in the Philippines, there was no way the country could pursue a pathway of sustainable development. After enactment of the Local Government Code of 1991, the government actively promoted community-based fisheries management (CBFM) to conserve the coastal resources. The increased attention paid to community-based fisheries management has come about through experience of the poor performance of other approaches and through the study of traditional systems of community management of natural resources which have not only survived but also appear to perform better than the alternatives. This paper presents the results of a study to assess the impacts of CBFM projects in the Philippines, using meta-analysis, on the equity and sustainability of small-scale coastal fisheries. The outcomes indicate a positive impact of CBFM on the equity of both involvement in management and benefit sharing and sustainable management of fisheries resources through the investigation of effective magnitude (effect size) based on eight indicators. The positive summary effect sizes of participation, influence, control, access, and income conjunctly portrayed an improved equity in the fishing community by implementing CBFM. The positive summary effect sizes of compliance and conflict indicated an affirmative community and, therefore, sustainable fisheries management. While the negative summary effect size of resource revealed the difficulties in recovering fish abundance in a relatively short period of time. Also, ten years of implementation of CBFM was discovered as the minimum duration with perceived equity and sustainability improvement for most indicators.  相似文献   

3.
《Marine Policy》2005,29(5):461-469
Fisheries management in the NE Atlantic has recently adopted a precautionary approach to setting catch limits. This has been accompanied by the development of more complex and multi-species modelling tools for predicting stock size and structure. The scientific community are now being asked to provide an ‘ecosystem-based approach’ to fisheries management. In this paper, we consider the science needs of this shift to a consideration of more complex systems to include both ecological and socio-economic components. At present, this involves use of the precautionary approach and multi-species management regimes, but will need to include multi-annual quota assessment, ‘stake-holder’ involvement and marine protected areas. How will these approaches sit together and how will science support them? As an example, we will consider what management of the North Sea demersal fishery may involve in 20 years time.  相似文献   

4.
《Marine Policy》2005,29(1):75-83
In its capacity to lead and facilitate the development and implementation of integrated management plans under the 1997 Oceans Act, Fisheries and Oceans Canada is working with a range of stakeholders through a collaborative process—the Eastern Scotian Shelf Integrated Management (ESSIM) Initiative—to develop and implement an integrated ocean management plan for the eastern Scotian Shelf off Nova Scotia. Stakeholders include federal and provincial departments, aboriginal communities, municipal and local planning authorities, ocean industry and resource use sectors, coastal communities, environmental interest groups, and university researchers. This large ocean management area possesses important living and non-living marine resources, high biological productivity and diversity, and increasing levels of multiple use and competition for ocean space and resources. The ESSIM vision is to achieve environmental, economic, social/community, and institutional sustainability in the eastern Scotian Shelf.The ESSIM Initiative is building a collaborative planning process that involves all interested and affected parties. Ongoing information sharing and dialogue with stakeholder groups is providing capacity building and important input to current proposals for a collaborative planning structure and the ocean management plan. A joint federal-provincial working group has been established to move the Initiative forward within government and to address policy and regulatory coordination for ocean management. The future ocean management plan will include a balanced set of environmental, social, economic and institutional objectives, indicators and management strategies, as well as spatial and temporal planning approaches to address multiple ocean use.This article provides an overview of the ESSIM Initiative, including an assessment of ocean use, ecosystem understanding, and ocean management and planning requirements. The design of a collaborative management and planning structure and process will be discussed, as well as the key elements of the future integrated ocean management plan.  相似文献   

5.
《Ocean & Coastal Management》2000,43(10-11):905-925
There is concern in England and Wales over the complexity and short comings of the current arrangements for coastal hazard planning and management. At a time of major constitutional reform involving a strengthened role for regional government, the UK needs to learn from other countries with a strong regional dimension which have developed successful systems for coastal hazard planning and management. New Zealand provides such an example. Recent local government reform and the ‘revolutionary’ Resource Management Act (RMA) 1991 have created a new organisational and administrative framework for coastal hazard planning and policy development in New Zealand which fosters integration, involves all levels of government and extends offshore. This paper provides a comparison of the regional dimension of coastal hazard planning in the two areas, focusing on the status, scope and jurisdiction of regional planning bodies and initiatives as well as investigating issues relating to intergovernmental and cross-sectoral links and public involvement. Although the widely acclaimed RMA is not the panacea for coastal management it was once hoped to be, the New Zealand experience illustrates the advantages of clearly defined roles for different levels of government, with emphasis on regional decision-making and extensive community involvement.  相似文献   

6.
In many parts of the world, inshore marine resources are being increasingly managed through collaborative arrangements between communities, governments, civil society and other groups. However, co-management of fisheries has had a mixture of successes and failures. Theorists and applied researchers have suggested a series of preconditions or factors thought to improve the chances of successful common-pool resource management. These include common property institutional design principles and their contextual conditions. Using a variety of web-based English keyword searches, published literature on community-based management and co-management of coral reefs was systematically reviewed with the view of determining if and how studies were evaluating these management systems as well as the extent to which critical aspects of common property theory were investigated and tested. Based on a screening of 600 and full evaluation of 157 journal articles, four measures of ecological conditions and five measures of contextual condition improvement were examined or could be evaluated with the data presented in 38 papers, which examined 49 co-management projects. Fewer than half of the 49 studies met the inclusion criteria of the analyses for documenting key design principles or contextual conditions. Additionally, most projects did not systematically report on contextual conditions, common property design principles and measures of success. The analysis demonstrates the large theoretical and empirical gaps in the evaluation of these management systems and begs for a more scientific, critical and multivariate approach.  相似文献   

7.
For the determination of benthic community health criteria of a biotic index, Benthic Pollution Index (BPI), the faunal data on macrobenthic community of Deukryang Bay collected in 2012 were used. Each macrobenthic fauna was classified into 4 functional groups according to their feeding and life history strategies and BPI was calculated using the abundance of fauna for these functional groups. Amphipods were the dominant faunal group belonging to Functional Group (FG) II in Deukryang Bay during all seasons. The BPI value fluctuated seasonally from 55 to 61, and the overall mean value of BPI in the reference area was 60, which was estimated as the threshold value for healthy communities. We tried to use BPI as an assessment tool for macrofaunal community health status by categorizing the BPI values into 5 grades. If the BPI value of the community is more than 60, the health status of a macrobenthic community will be assessed as ‘Excellent’ (Grade 1) and as ‘Good’ (Grade 2), if between 40 and 60, as ‘Fair’ (Grade 3), if between 30 and 40, as ‘Poor’ (Grade 4), if between 20 and 30, and finally the health status of a community will be assessed as ‘Very Poor’ (Grade 5), if the BPI value is less than 20. This assessment tool using BPI was applied to macrobenthic communities in Jinhae Bay including the Special Management Area of South Korea. In Jinhae Bay, the FG IV containing a spionid species, Paraprionospio patiens was the most dominant group. The values of BPI in Jinhae Bay were very low and ranged from 11 to 23. The ecological health status of macrobenthic communities in Jinhae Bay was ‘Very Poor’ at more than 50% of sites, especially in summer.  相似文献   

8.
A reliable Dynamic Positioning (DP) system is the key requirement for critical offshore activities. This paper presents the quantitative reliability assessment for offshore multi-megawatt capacity electric DP systems based on the present technological maturity and the offshore industry-reported component failure rates. It is identified that the International Maritime Organization defined DP1, DP2 DP3 architectures with fully redundant power generators and electric variable speed thrusters could have mean time to fail periods of 0.3, 2.1 and 2.5 years respectively. In the analyzed DP2 architecture, the power generation cum management system, the computer control cum sensors system and the thruster systems contribute to 17%, 42%, and 41% of the total DP system failures. The results presented could be used for reliability-centered design and maintenance planning of multi megawatt capacity DP systems.  相似文献   

9.
The Great Barrier Reef Outlook Report 2009 was the first produced in response to a newly legislated requirement for five-yearly reports on the status of and outlook for the Great Barrier Reef. It adopted an ecosystem approach, assessing all habitats and species, ecosystem processes and major uses. By then considering the factors affecting the ecosystem, coupled with an assessment of management effectiveness, it provided a risk-based forward-looking projection for the ecosystem. Rarely has such a comprehensive, ecosystem-based report been produced to guide government action. With no pre-determined path to follow for interpreting the legislative requirements, the Great Barrier Reef Marine Park Authority (GBRMPA) developed a repeatable structure and method for Great Barrier Reef Outlook Reports that impartially and consistently considers the evidence and clearly presents the findings. The GBRMPA worked closely with relevant Australian and Queensland Government agencies as well as researchers, industry representatives and the community while developing the report. That such a report must be produced every five years allows an overview of the effectiveness of management responses to be regularly assessed. It also provides a transparent means of highlighting and tracking emerging risks facing the Great Barrier Reef.  相似文献   

10.
《Oceanologica Acta》1999,22(6):627-640
To evaluate the impact of land-based contaminants on benthic faunas, as part of the Land-Ocean Contamination Study (LOCS), a study transect was established in Jakarta Bay, Indonesia during the 1996 southeasterly monsoon. The transect extended 72 km between the city's main port, Tanjung Priok, and the Pilau Seribu Island chain in the Java Sea. The dissolved concentrations of Pb, Cu, Zn, Cr and Ni in seawater, in suspended particulate matter (SPM) and surficial sea bed sediments were measured along the transect at nine sites. In addition, metal concentrations were measured in tissues of the corals Goniopora lobata and Lobophyllia hemprichii at five sites, and of the green mussel, Perna viridis at six sites. An assessment of the impact of contaminants on the faunas was made using a biomarker approach, employing coral community analysis and lysosomal stability with Perna viridis. The results of the study showed two main trends. The distributions of metals dissolved in seawater, in SPM, and in the coral and mussel tissues were similar, and failed to show a consistent graded response from inshore to offshore sites. This suggests that the concentration of metals in waters is the primary route for metal uptake by the coral and mussel tissues. By way of contrast, a clear offshore increase in coral generic diversity, coral cover, coral colony numbers and neutral-red retention time (lysosomal stability) was observed, suggesting increasing nearshore stress. Whilst the coral community stucture may reflect the seasonally-averaged metal distributions in the bay (shown by the metal content of sea bed sediments which increase shorewards), it is more likely that the coral community structure and lysosomal biomarker are responding principally to other nearshore stresses, such as sediment and nutrient loading of water (sewage) or, more likely, organic contaminants such as oils and other hydrocarbons.  相似文献   

11.
《Ocean & Coastal Management》2006,49(5-6):259-280
The development of sustainability indicator systems (SIS) has been a response to practically apply and interpret ecosystem-based and precautionary approaches to fisheries management. Fisheries- based indicator systems have been characterised by recognition of their utility, but hampered by a lack of data, clear roles and responsibilities and an uneven distribution of implementation across governance jurisdictions. This paper explores a policy-based holistic model of an indicator system consisting of inputs, core structures and outputs and uses this as the basis of an assessment framework. The framework is applied to two recent reporting systems: the Australian government's Commonwealth Sustainable Fisheries Assessments and the Marine Stewardship Council initiative.  相似文献   

12.
Understanding how information flows between scientific and decision-making communities is essential for the creation of effective strategies to link scientific advice to management decisions. Interviews of scientists and managers in two inter-related fisheries management organizations – the Department of Fisheries and Oceans (DFO) and the Northwest Atlantic Fisheries Organization (NAFO) – and direct observations at science and management meetings revealed important organizational characteristics that influence the production, communication, and use of scientific information in decision-making. Formal processes for communicating scientific advice to managers – DFO's Canadian Scientific Advisory Secretariat (CSAS) and NAFO's Fisheries Commission's Request for Advice – demonstrate the use of credible, relevant, and legitimate advice for operational decision-making for fisheries management. Such defined processes, in addition to governmental bureaucracy, departmentalization, and de-centralization, can limit communication as highlighted for Canada as a Contracting Party to NAFO. Administrative mechanisms can pose challenges to implementing ecosystem approaches to fisheries management (EAF) and to addressing the impacts of climate change. Emerging organizational structures and behaviours facilitate communication at the science-policy interface, within and between the organizations, thereby improving understanding of science and management needs and promoting trust relationships between scientists and managers. The involvement of multiple stakeholders in the information pathways addresses concerns about scientific uncertainty in assessment advice. A linear model of information flow typifies operational decision-making; however, collaborative models that incorporate different types of information, apart from fisheries science, are required to enable ecosystem-based management. The characteristics of the information pathways are particularly relevant as the organizations address their EAF mandates.  相似文献   

13.
近35年来,多家高校、科研机构和政府管理部门在大亚湾潮下带和潮间带进行了软体动物群落生态、种群生态和污染生态研究,揭示了不同生境软体动物的物种数、栖息密度和生物量的时空变化,为渔业生产和生态评估提供了基础资料。但早期有关文献难觅、信息不畅,导致软体动物分类存在同物异名和异物同名现象,一些中文学名和拉丁文学名张冠李戴,历史数据之间缺乏可比性等。作者提出了几点研究展望:(1)加强软体动物分类基础研究和科普宣传;(2)建立软体动物群落生态大数据式研究规则;(3)建立软体动物数据库;(4)人工智能及其他新技术和新方法的引入。本文可为科技工作者制订较完善的研究计划以及获得更精准的研究结果提供参考,可为政府部门提供决策依据。  相似文献   

14.
Picoeukaryotes are important members of the surface ocean microbial community with high diversity and significant temporal and spatial variations in community composition. Little is known about the picoeukaryotic biodiversity and community in the Yellow Sea, where hydrologic conditions are very different with the influence of the Yellow Sea Warm Current (YSWC). Using Illumina high throughput sequencing targeting 18S rDNA, we investigated the composition of picoeukaryotes at a permanent monitoring site in the central Yellow Sea from 2011 to 2013. Alveolata, Stramenopiles, and Archaeplastida were the main super groups found. Prasinophytes were dominant in N-YSWC (not influenced by the YSWC) samples whilst YSWC (influenced by the YSWC) samples were dominated by different groups, such as MALV-II (novel marine Alveolata), MAST-3, MAST-4 (novel marine Stramenopiles), and Dictyochophyceae. N-YSWC samples were grouped together in nMDS (non-metric multidimensional scaling) using the Bray–Curtis method. Distances between each two YSWC samples were greater. Based on indicator operational taxonomic unit (OTU) analysis (IOA), indicator species of the YSWC were represented by Pseudochattonella farcimen, Florenciella parvula within the class Dictyochophyceae, and Phaeocystis cordata within the class Prymnesiophyceae. The findings in our study suggest that picoeukaryotic communities in the central Yellow Sea differ temporally in response to changes in the YSWC.  相似文献   

15.
Scleractinian corals create three-dimensional reefs that provide sheltered refuges, facilitate sediment accumulation, and enhance colonization of encrusting fauna. While heterogeneous coral habitats can harbor high levels of biodiversity, their effect on the community composition within nearby sediments remains unclear, particularly in the deep sea. Sediment macrofauna from deep-sea coral habitats (Lophelia pertusa) and non-coral, background sediments were examined at three sites in the northern Gulf of Mexico (VK826, VK906, MC751, 350–500 m depth) to determine whether macrofaunal abundance, diversity, and community composition near corals differed from background soft-sediments. Macrofaunal densities ranged from 26 to 125 individuals 32 cm−2 and were significantly greater near coral versus background sediments only at VK826. Of the 86 benthic invertebrate taxa identified, 16 were exclusive to near-coral habitats, while 14 were found only in background sediments. Diversity (Fisher’s α) and evenness were significantly higher within near-coral sediments only at MC751 while taxon richness was similar among all habitats. Community composition was significantly different both between near-coral and background sediments and among the three primary sites. Polychaetes numerically dominated all samples, accounting for up to 70% of the total individuals near coral, whereas peracarid crustaceans were proportionally more abundant in background sediments (18%) than in those near coral (10%). The reef effect differed among sites, with community patterns potentially influenced by the size of reef habitat. Taxon turnover occurred with distance from the reef, suggesting that reef extent may represent an important factor in structuring sediment communities near L. pertusa. Polychaete communities in both habitats differed from other Gulf of Mexico (GOM) soft sediments based on data from previous studies, and we hypothesize that local environmental conditions found near L. pertusa may influence the macrofaunal community structure beyond the edges of the reef. This study represents the first assessment of L. pertusa-associated sediment communities in the GOM and provides baseline data that can help define the role of transition zones, from deep reefs to soft sediments, in shaping macrofaunal community structure and maintaining biodiversity; this information can help guide future conservation and management activities.  相似文献   

16.
Dinoflagellate ecology is based on multiple adaptive strategies and species having diverse habitat preferences. Nine types of mixing-irradiance-nutrient habitats selecting for specific marine dinoflagellate life-form types are recognised, with five rules of assembly proposed to govern bloom-species selection and community organisation within these habitats. Assembly is moulded around an abiotic template of light energy, nutrient supply and physical mixing in permutative combinations. Species selected will have one of three basic (C-, S-, R-) strategies: colonist species (C-) which predominate in chemically disturbed habitats; nutrient stress tolerant species (S-), and species (R-) tolerant of shear/stress forces in physically disturbed water masses. This organisational plan of three major habitat variables and three major adaptive strategies is termed the 3-3 plan. The bloom behaviour and habitat specialisation of dinoflagellates and diatoms are compared. Dinoflagellates behave as annual species, bloom soloists, are ecophysiologically diverse, and habitat specialists whose blooms tend to be monospecific. Diatoms behave as perennial species, guild members, are habitat cosmopolites, have a relatively uniform bloom strategy based on species-rich pools and exhibit limited habitat specialisation. Dinoflagellate bloom-species selection follows a taxonomic hierarchical pathway which progresses from phylogenetic to generic to species selection, and in that sequence. Each hierarchical taxonomic level has its own adaptive requirements subject to rules of assembly. Dinoflagellates would appear to be well suited to exploit marine habitats and to be competitive with other phylogenetic groups, yet fail to do so.  相似文献   

17.
《Journal of Sea Research》2007,57(2-3):114-125
Many flatfish species are caught in mixed demersal trawl fisheries and managed by Total Allowable Catch (TAC). Despite decades of fisheries management, several major stocks are severely depleted. Using the Common Fisheries Policy (CFP) as an example, the failure of mixed-fisheries management is analysed by focussing on: the management system; the role of science; the role of managers and politicians; the response of fisheries to management. Failure of the CFP management could be ascribed to: incorrect management advice owing to bias in stock assessments; the tendency of politicians to set the TAC well above the recommended level; and non-compliance of the fisheries with the management regulations. We conclude that TAC management, although apparently successful in some single-species fisheries, inevitably leads to unsustainable exploitation of stocks caught in mixed demersal fisheries as it promotes discarding of over-quota catch and misreporting of catches, thereby corrupting the basis of the scientific advice and increasing the risk of stock collapse. This failure in mixed demersal fisheries has resulted in the loss of credibility of both scientists and managers, and has undermined the support of fishermen for management regulations. An approach is developed to convert the TAC system into a system that controls the total allowable effort (TAE). The approach takes account of the differences in catch efficiency between fleets as well as seasonal changes in the distribution of the target species and can also be applied in the recovery plans for rebuilding specific components of the demersal fish community, such as plaice, cod and hake.  相似文献   

18.
黄海中南部近岸海域春季鱼类浮游生物群落空间格局研究   总被引：6，自引：1，他引：5  
根据2015年春季在黄海中南部近岸海域进行的鱼类浮游生物大型浮游生物网水平拖网数据,采用生态多样性指数和多元统计分析等方法,研究了该海域鱼类浮游生物的种类组成和群落空间格局及其与环境因子的关系。结果表明,本次调查共采集到鱼类浮游生物35种,其中鱼卵21种,仔稚鱼23种。鱼类浮游生物隶属于8目18科34属,优势种为鳀（Engraulis japonicus）、鲬（Platycephalus indicus）、鱼衔属（Callionymus spp.）和小黄鱼（Pseudosciaena polyactis）。其中,鳀和鱼衔属主要分布于海州湾渔场海域,鲬主要分布于吕泗渔场海域,小黄鱼多分布于吕泗渔场北部海域。生态类型包括半咸水型、沿岸型和近海型种类。聚类分析表明,鱼类浮游生物群落可划分为以鱼衔属、鳀为优势种的站位组A（主要分布于海州湾海域）、以小黄鱼、黄鲫（Setipinna taty）等为优势种的站位组B（主要位于江苏沿岸海域）和以鲬为优势种的站位组C（主要位于江苏沿岸-近海海域）,以站位组B的群落物种多样性指数和均匀度指数最高。各站位组的鱼类浮游生物的生态类型和适温类型组成不同,这与其所处的海域生境有关。典范对应分析（CCA）表明,影响春季黄海中南部鱼类浮游生物群落空间结构的主要环境因子为水深和表层温度。同时也受洋流、底质类型等多种因素的综合影响。研究结果初步揭示了黄海中南部近岸海域鱼类浮游生物群落的空间格局,可为今后科学制定该海域水产种质资源保护区、资源量化管理等资源养护管理措施提供科学依据与技术支撑。  相似文献   

19.
The spatial structure of fishery resources influences stock dynamics and finally the fishery. Therefore, this aspect should be included as a key topic in the assessment and management of fisheries. The fishery of the sea urchin Paracentrotus lividus in Galicia has been used as case study to demonstrate how the mismatch between biological, fishery and management scales causes failures in the governance, giving rise to over-exploitation. P. lividus is spatially distributed in nested biological units: patches, micro-stocks, local populations and metapopulations. Fishing operations are local exploiting micro-stocks; however management units in Galician comprise usually more than one local population. This pattern allows the depletion of several micro-stocks without any short-term signals in the exploitation rates over the complete managed territory. Management units should be redefined according to the boundaries of the local populations. In addition, the implementation of reserve networks or a rotation system could allow to effectively managing the resource at a fine-scale. Any of both regulations could also compensate the inverse density dependence that regulates recruitment and fecundity in this species.  相似文献   

20.
For decades, the scientific community has conducted essential background research and developed appropriate modeling tools in support of an ecosystem-based approach to natural resource management. Resource managers and the public, however, lack a clear roadmap for working with scientists to move beyond the traditional single-species approach. With current management processes so strongly focused on working in a species-by-species framework, there are entrenched cultural and institutional challenges to shifting those processes toward ecosystem-based management. We propose using the integrated ecosystem assessment process to both develop new management ideas for a particular ecosystem, and to help shift public policy processes and perceptions to embrace ecosystem approaches to management.  相似文献   

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