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排序方式: 共有72条查询结果,搜索用时 15 毫秒
51.
Nicholas A.O. Hill Keith P. Michael Allen Frazer Stefan Leslie 《Ocean & Coastal Management》2010,53(11):659-668
Local ecological knowledge (LEK) has been recognised as an important source of information for resource management in data-poor fisheries. Our case study of the Foveaux Strait dredge oyster fishery in New Zealand shows LEK can also make a significant contribution to the management of data-rich fisheries, but highlights the importance of appropriate data collection design and interpretation and presentation of LEK. We formalise a structure for interpreting LEK, illustrate the importance of design by comparing two LEK studies, and discuss how the inclusion of LEK into the fisheries plan process has provided unexpected benefits for better management of the fishery. 相似文献
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S. J. Gibowicz Carlo Denis Manfred Koch Chen Yong Michael Manga Tapan Mukerji Gary Mavko W. Bielski Maria Jeleńska Frazer Tabeart Lucia Lovison-Golob Peter Ketelaar Douglas J. Galpin Carlo Denis M. Ghil C. L. Keppenne Tracey K. Tromp Louis François Zbigniew Sorbjan 《Pure and Applied Geophysics》1995,145(2):363-398
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Frazer Pearce 《Astronomy& Geophysics》2004,45(2):2.15-2.17
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This paper examines efforts to develop stakeholder led self-governance in the Bluff oyster fishery. The paper focuses on collaborative management and its ability to address some of the unintended consequences of management. The Bluff oyster fishery's administrative, biological, and economic performances are analysed to assess whether or not the participatory management model, in this case fisheries self-governance, complements individual transferable quota (ITQ) for this inshore shellfish fishery.The paper argues that the Bluff oyster fishery's current self-governance model, based on a fishery plan, aids in improving the performance of the fishery, and that the Bluff oyster fishery has the capacity to shift further towards a stakeholder led self-regulated fishery. 相似文献
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Peter A. Thomas Jörg M. Colberg Hugh M. P. Couchman George P. Efstathiou Carlos S. Frenk Adrian R. Jenkins Alistair H. Nelson Roger M. Hutchings John A. Peacock Frazer R. Pearce & Simon D. M. White 《Monthly notices of the Royal Astronomical Society》1998,296(4):1061-1071
We investigate the internal structure of clusters of galaxies in high-resolution N -body simulations of four different cosmologies. There is a higher proportion of disordered clusters in critical-density than in low-density universes, although the structure of relaxed clusters is very similar in each case. Crude measures of substructure, such as the shift in the position of the centre-of-mass as the density threshold is varied, can distinguish the two in a sample of just 20 or so clusters; it is harder to differentiate between clusters in open and flat models with the same density parameter. Most clusters are in a quasi-steady state within the virial radius and are well-described by the density profile of Navarro, Frenk & White. 相似文献
60.
Beach erosion under rising sea‐level modulated by coastal geomorphology and sediment availability on carbonate reef‐fringed island coasts 下载免费PDF全文
Bradley M. Romine Charles H. Fletcher L. Neil Frazer Tiffany R. Anderson 《Sedimentology》2016,63(5):1321-1332
This study addresses gaps in understanding the relative roles of sea‐level change, coastal geomorphology and sediment availability in driving beach erosion at the scale of individual beaches. Patterns of historical shoreline change are examined for spatial relationships to geomorphology and for temporal relationships to late‐Holocene and modern sea‐level change. The study area shoreline on the north‐east coast of Oahu, Hawaii, is characterized by a series of kilometre‐long beaches with repeated headland‐embayed morphology fronted by a carbonate fringing reef. The beaches are the seaward edge of a carbonate sand‐rich coastal strand plain, a common morphological setting in tectonically stable tropical island coasts. Multiple lines of geological evidence indicate that the strand plain prograded atop a fringing reef platform during a period of late‐Holocene sea‐level fall. Analysis of historical shoreline changes indicates an overall trend of erosion (shoreline recession) along headland sections of beach and an overall trend of stable to accreting beaches along adjoining embayed sections. Eighty‐eight per cent of headland beaches eroded over the past century at an average rate of ?0·12 ± 0·03 m yr?1. In contrast, 56% of embayed beaches accreted at an average rate of 0·04 ± 0·03 m yr?1. Given over a century of global (and local) sea‐level rise, the data indicate that embayed beaches are showing remarkable resiliency. The pattern of headland beach erosion and stable to accreting embayments suggests a shift from accretion to erosion particular to the headland beaches with the initiation of modern sea‐level rise. These results emphasize the need to account for localized variations in beach erosion related to geomorphology and alongshore sediment transport in attempting to forecast future shoreline change under increasing sea‐level rise. 相似文献