نتایج جستجو برای: fisheries
تعداد نتایج: 15801 فیلتر نتایج به سال:
The three decades following World War ii were a period of rapidly increasing fishing effort and landings, but also of spectacular collapses, particularly in small pelagic fish stocks. This is also the period in which a toxic triad of catch underreporting, ignoring scientific advice and blaming the environment emerged as standard response to ongoing fisheries collapses, which became increasingly...
Where they dominate coastlines, seagrass beds are thought to have a fundamental role in maintaining populations of exploited species. Thus, Mediterranean seagrass beds are afforded protection, yet no attempt to determine the contribution of these areas to both commercial fisheries landings and recreational fisheries expenditure has been made. There is evidence that seagrass extent continues to ...
449 Gross revenues from marine capture fisheries worldwide are estimated at between US$80 billion and 85 billion annually1–3. As a primary industry4, fisheries support the wellbeing of nations through direct employment in fishing, processing and ancillary services amounting to between US$220 billion and 235 billion annually in 2003 (ref. 5). Globally, fish provide nearly three billion people wi...
In developing countries, official statistics, national accounts, and economic development initiatives generally focus on commercial, often exportoriented fisheries, which are often perceived to be the major economic contribution of fisheries. While small-scale, non-commercial fisheries, especially near-shore subsistence fisheries, have been recognized as fundamental for social, cultural, and fo...
Climate change is predicted to have a range of direct and indirect impacts on marine and freshwater capture fisheries, with implications for fisheries-dependent economies, coastal communities and fisherfolk. This technical paper reviews these predicted impacts, and introduces and applies the concepts of vulnerability, adaptation and adaptive capacity. Capture fisheries are largely driven by fos...
Introduction 285 MPAs, stock assessments and spatial modelling in marine ecosystems 286 The role of fisheries science in management 287 Fishery-dependent information 288 Life-history information 290 Catch demographic data 291 Fishery-independent surveys 291 Spatial variability and movement patterns 293 Structure of assessment models 293 Fisheries management objectives and obligations 296 Abstra...
Using estimates of the primary production required (PPR) to support fisheries catches (a measure of the footprint of fishing), we analyzed the geographical expansion of the global marine fisheries from 1950 to 2005. We used multiple threshold levels of PPR as percentage of local primary production to define 'fisheries exploitation' and applied them to the global dataset of spatially-explicit ma...
China's 13th Five-Year Plan, launched in March 2016, provides a sound policy platform for the protection of marine ecosystems and the restoration of capture fisheries within China's exclusive economic zone. What distinguishes China among many other countries striving for marine fisheries reform is its size-accounting for almost one-fifth of global catch volume-and the unique cultural context of...
BACKGROUND Although bycatch of industrial-scale fisheries can cause declines in migratory megafauna including seabirds, marine mammals, and sea turtles, the impacts of small-scale fisheries have been largely overlooked. Small-scale fisheries occur in coastal waters worldwide, employing over 99% of the world's 51 million fishers. New telemetry data reveal that migratory megafauna frequent coasta...
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