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No Thumbnail AvailableBook (series)Effects of riverine inputs on coastal ecosystems and fisheries resources 1995
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No results found.Five chapters are presented which address a number of aspects of riverine and runoff effects on coastal marine systems. Examples are presented and documented in which the apparent effects of runnoff-related nutrient enrichment and consequent eutrophication have been important. Various other aspects, such as sedimentation, etc. are explored. The purpose is to advance the scientific, policy, and political dialogue on issues related to utilization and protection of coastal marine ecosystems. The “Marine Catchment Basin” or “MCB” appears to be the logical scale of policy and management interest wherever terrestrial runoff has substantial impacts on a marine system. The MCB expands the “marine ecosystem” concept to include not only the marine aquatic system, but also the adjacent land areas that drain into it. The MCB concept has been identified primarily with semi-enclosed seas, where effects have been particularly dramatic and where the “catchment basin” retains an easily visualized ge ological context. However, even along open ocean coasts, hydrodynamic processes act to retain coherent masses of water, together with their contained organisms and materials, against the coast. Thus open coastal areas may exhibit MCB features similar to those of enclosed or semi-enclosed basins. -
No Thumbnail AvailableProjectRegional Workshop on the Conservation and Sustainable Management of Coral Reefs 1997
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No results found.The Regional Workshop convened by M S Swaminathan Research Foundation in collaboration with the Bay of Bengal Programme of FAO (BOBP) is designed to address these issues and to develop an action plan for saving the remaining coral reefs in the SAARC region. Since its establishment in 1989, M S S R F has given priority attention to the conservation and sustainable use of Coastal Mangrove ecosystems. In many areas, Mangroves, sea grass meadows and coral reefs constitute an integrated ecosystem. Th e Gulf of Mannar Biosphere Reserve represents one such integrated ecosystem. Currently, a detailed action plan is being prepared with assistance from the Global Environment Facility (GEF) and the UN Development Programme (UNDP) for preserving for posterity the biological wealth of the Gulf of Mannar region. -
No Thumbnail AvailableProjectSite selection for aquaculture: plankton and benthos
Establishment of African Regional Aquaculture Centre
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No results found.The organisms in the aquatic environment can be devided into three large groups - the plankton, nekton and benthos. In the benthos are included sessile, creeping or burrowing organisms found in the bottom of water bodies. The nekton is composed of swimming animals such as the fish and in the plankton is included all of the floating or drifting organisms. The term plankton was proposed by Victor Hesner in 1887 to designate that “heterogeneous assemblage of organisms which float and move at the wi ll of the waves and other water movements”. Much of the available information on plankton and benthos existing refer to those in natural water bodies, often large lakes and seas, which are described well in text books of limnology and marine biology - oceanography. These are also certainly of aquaculture importance in special cases, especially coastal aquaculture (“Pen and cage culture”) and also in extensive aquaculture, beginning with “stocking of open waters”, both natural and man-made. O ur interest here is to increase the richness of the water bodies by water quality assessment (physical and chemical feature of water, we already referred to in chapter 8 and 9 and also biological productivity, referred to in chapter 10), to judge their suitability for aquaculture. While biological productivity of a water body can be obtained by measurement of primary productivity, a good index of biological productivity is the measure of abundance of plankton and benthos.
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