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The open ocean

Xem 1-20 trên 21 kết quả The open ocean
  • Physical aspects light, depth, and chemistry of the open ocean, microbes and plants essential organisms in the open ocean, sponges, cnidarians, and worms animals of the ocean surface and seafloor, mollusks, crustaceans and echinoderms advanced invertebrates of the open ocean,... is the main content of the book The open ocean. Invite you to consult

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  • Open ocean aquaculture is broadly defined as the rearing of marine organisms in exposed areas beyond significant coastal influence. Open ocean aquaculture employs less control over organisms and the surrounding environment than do inshore and land-based aquaculture, which are often undertaken in enclosures, such as ponds. When aquaculture operations are located beyond coastal state jurisdiction, within the U.S. Exclusive Economic Zone (EEZ; generally 3 to 200 miles from shore), they are regulated primarily by federal agencies.

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  • Karanja estuary, an important estuarine ecosystem located adjoining to the Jawaharlal Nehru Port (largest container handling Seaport in India), Raigad district of Maharashtra. The North West coast of India is famous for the dol nets fishery. Dol nets (a kind of bag net) are operated in coastal seas having strong tidal currents and amplitude with its mouth opening always facing towards the direction of the tide.

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  • Elements of present-day sea use management have evolved over a long period. Basic to these are the principles of freedom of the seas, open access to resources, and sectoral management. There is, however, a necessary corrective to this Euro-centric view when the relationships between people and the marine environment are examined in several other cultures. Open access in Western society has experienced more recent restrictions as resource scarcities have arisen and new technological capacities have increased.

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  • UNIT 2 : BIOMES AND ECOSYSTEMS Influenced by latitude, elevation, and associated moisture and temperature regimes, terrestrial biomes vary geographically from the tropics through the arctic and include various types of forest, grassland, shrub land, and desert. These biomes also include their associated freshwater communities: streams, lakes, ponds, and wetlands. Marine environments, also considered biomes by some ecologists, comprise the open ocean, littoral (shallow water) regions, benthic (bottom) regions, rocky shores, sandy shores, estuaries, and associated tidal marshes.

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  • Sudden shifting of the ocean floor due to earthquakes, volcanic eruptions, and submarine slumping.open ocean: short heights, long wavelengths (100 km), and long periods 400-500 mph!!! shallow water: their length shortens and their height increases dramatically...

    ppt33p thachthaoxanh 24-08-2011 53 4   Download

  • Nitrogen contamination may come from a variety of sources: municipal sewage, animal manure, atmospheric deposition, biological N fixation, soil organic N, and/or nitrogen fertilizers. The consequences of contamination in a specific water body will depend upon the amount of contamination from all sources and characteristics of the receiving waters. Shallow rivers, wetlands, lakes, and reservoirs, have some capacity to remove nitrogen by microbial denitrification.

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  • It was an afternoon in autumn, with a sound of wintry breakers on the shore, the tall woods copper-colour, the thickets dishevelled, and the nuts, in the corries of Ardkinglas, the braes of Ardno, dropping upon bracken burned to gold. Until he was out of the glen and into the open land, the traveller could scarcely conceive that what by his chart was no more than an arm of the ocean could make so much ado; but when he found the incoming tide fretted here and there by black rocks, and elsewhere, in little bays, the beaches strewn with massive boulders, the high rumour of...

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  • Fish are aquatic vertebrates with fins for appendages. They "breathe" by means of gills. Fish make up the largest of the vertebrate groups with over 20,000 species. They can be found in a great variety of lakes, streams, oceans and estuaries. Fish are divided into two groups based on the composition of their skeletons. The sharks, skates and rays are cartilaginous fish. Their skeletons are made of cartilage, the same flexible material in your ear lobes and nose. The majority of fish have skeletons made of bone and are called bony fish....

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  • Oceanography is a very complex science. Its field study, the knowledge of the oceans and the seas and their physical and biological characteristics, is fundamental to comprehend many oceanographic and ecological aspects that directly influence the human life and the planet health. From micro-scale, like coastal processes, to macro-scale, like Global Change, the oceans, the seas and the marine life, play the main role to maintain the earth equilibrium, both from a physical and a chemical point of view (e.g. carbon cycle and water masses dynamic)....

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  • Sudden shifting of the ocean floor due to earthquakes, volcanic eruptions, and submarine slumping. open ocean: short heights, long wavelengths (100 km), and long periods 400500 mph!!! shallow water: their length shortens and their height increases dramatically. These are NOT tidal waves

    ppt36p thachthaoxanh 24-08-2011 56 6   Download

  • Marine Sediments are:Particles of various sizes derived from a variety of sources that are deposited on the ocean floor.A vast “library” recording geologic, oceanographic and climatic conditions Remarkably complete compared to land Effects of water velocity on transport: rivers and nearshore vs open ocean...

    ppt30p thachthaoxanh 24-08-2011 69 6   Download

  • Eastern Sea of Vietnam is the world's largest semi-open sea and is bounded by archipelagos, islands, mainland and connected partially with Pacific and Indian Ocean. Its total water surface area is about 2,974,600km2. Vietnamese and foreign geoscientists have researched, got samples and mapped the geological map of Eastern Sea since 1960s but no guidance or right method was carried out to map, especially in presenting geological units on geological map.

    pdf10p dem_thanh 22-12-2012 70 6   Download

  • In the beginning of the year 1920 I happened to be living in the Siberian town of Krasnoyarsk, situated on the shores of the River Yenisei, that noble stream which is cradled in the sun-bathed mountains of Mongolia to pour its warming life into the Arctic Ocean and to whose mouth Nansen has twice come to open the shortest road for commerce from Europe to the heart of Asia. There in the depths of the still Siberian winter I was suddenly caught up in the whirling storm of mad revolution raging all over Russia, sowing in this peaceful and rich land vengeance, hate, bloodshed and...

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  • "A time will come in later years when the Ocean will unloose the bands of things, when the immeasurable earth will lie open, when seafarers will discover new countries, and Thule will no longer be the extreme point among the lands."--Seneca. Unseen and untrodden under their spotless mantle of ice the rigid polar regions slept the profound sleep of death from the earliest dawn of time. Wrapped in his white shroud, the mighty giant stretched his clammy ice-limbs abroad, and dreamed his age-long dreams. Ages passed--deep was the silence....

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  • Both the retreat of the glaciers and the rise of oxygen in the ocean may have spurred the rise of the animals. All animals need oxygen to fuel their metabolism and to build their tissues. The low levels of oxygen in the oceans may have made it impossible for the ancestors of animals to evolve into multicellular creatures. If a rise in oxygen opened the door for animal evolution, what pushed the ani- mals through? Part of that answer may lie within the animals themselves—in particular, in the set of genes that control their development.

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  • Climate change has become one of the most contentious as well as pressing issue of our times. Changes and variations in rainfall pattern and temperature have already begun to adversely affect capture and culture fish production. The impactful scientific literature produced on climate change in relation to fisheries was tracked for period since 1990 till 2018. The open source freeware Publish or Perish (PoP) desktop application was used to retrieve the scientific articles, which were then subjected to scientometric study.

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  • When seen from space, “Planet Earth” is a mix of clouds, with the majority (two thirds) of the total surface under ocean water with the remaining third of land forming what we call continents, with various degrees of increasing albedo from open water bodies, vegetation, bare soil, rocks, deserts, and snow/ice packs. In a very short time (relative to Earth's age), the modern human civilization has conquered its neighboring space with probes, satellites, and vehicles carrying humans for exploration.

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  • Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010, Article ID 205095, 13 pages doi:10.1155/2010/205095 Review Article High-Resolution Sonars: What Resolution Do We Need for Target Recognition? Yan Pailhas, Yvan Petillot, and Chris Capus School of Electrical and Physical Science, Oceans Systems Laboratory, Heriot Watt University, Edinburgh EH14 4AS, Scotland, UK Correspondence should be addressed to Yan Pailhas, y.pailhas@hw.ac.

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  • Secondary diamond sources are deposits that have been removed from the primary source (a kimberlite or lamproite pipe) by natural erosion and eventually deposited in riverbeds, along shorelines, in glaciers and on the ocean floor. They are also known as alluvial deposits. Although alluvial deposits account for only 10-15 percent of the world’s diamonds, they are generally higher-quality stones given that they retain more volume after polishing; they therefore command a higher price. The location of the diamond deposits determines the mining method that producers use (see.Figure.

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