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Shark Cage Diving
Shark cage diving is underwater diving or snorkeling where the observer remains inside a protective cage designed to prevent sharks from making contact with the divers. Shark cage diving is used for scientific observation, underwater cinematography, and as a tourist activity. Sharks may be attracted to the vicinity of the cage by the use of bait, in a procedure known as ''chumming'', which has attracted some controversy as it is claimed to potentially alter the natural behaviour of sharks in the vicinity of swimmers. Similar cages are also used purely as a protective measure for divers working in waters where potentially dangerous shark species are known to be present. In this application the shark-proof cage may be used as a refuge, or as a diving stage during descent and ascent, particularly during staged decompression where the divers may be vulnerable while constrained to a specific depth in mid-water for several minutes. In other applications a mobile cage may be carried by t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharks Outside Cage
Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used to refer to all extinct members of Chondrichthyes with a shark-like morphology, such as hybodonts and xenacanths. The oldest modern sharks are known from the Early Jurassic. They range in size from the small dwarf lanternshark (''Etmopterus perryi''), a deep sea species that is only in length, to the whale shark (''Rhincodon typus''), the largest fish in the world, which reaches approximately in length. Sharks are found in all seas and are common to depths up to . They generally do not live in freshwater, although there are a few known exceptions, such as the bull shark and the river shark, which can be found in both seawater and freshwat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Water White Death
''Blue Water, White Death'' is a 1971 American documentary about sharks which was directed by Peter Gimbel and James Lipscomb. It received favourable reviews and was described as a "well produced odyssey" and "exciting and often beautiful". It screened theatrically and was broadcast on television at various times during the 1970s and 1980s. The film was re-released on DVD in 2009. Cast and crew The following people appeared in the documentary – Tom Chapin, Phil Clarkson, Stuart Cody, Peter Lake, Peter Matthiessen, Rodney Fox, Valerie Taylor, Ron Taylor, Stan Waterman, Peter Gimbel, James Lipscomb and Rodney Jonklaas. In 1986 Tom Chapin reflected on his role as an assistant cameraman on the production, joking that his life had "all been downhill since." Some underwater sequences appearing in the film were shot using shark-proof cages. See also * List of American films of 1971 *Dangerous Reef Dangerous Reef is an island and reef system located in the Spencer Gulf in the Au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CBS News
CBS News is the news division of the American television and radio service CBS. CBS News television programs include the ''CBS Evening News'', ''CBS Mornings'', news magazine programs '' CBS News Sunday Morning'', '' 60 Minutes'', and '' 48 Hours'', and Sunday morning political affairs program ''Face the Nation''. CBS News Radio produces hourly newscasts for hundreds of radio stations, and also oversees CBS News podcasts like '' The Takeout Podcast''. CBS News also operates a 24-hour digital news network. Up until April 2021, the president and senior executive producer of CBS News was Susan Zirinsky, who assumed the role on March 1, 2019. Zirinsky, the first female president of the network's news division, was announced as the choice to replace David Rhodes on January 6, 2019. The announcement came amid news that Rhodes would step down as president of CBS News "amid falling ratings and the fallout from revelations from an investigation into sexual misconduct allegations" ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini. It also completely enclaves the country Lesotho. It is the southernmost country on the mainland of the Old World, and the second-most populous country located entirely south of the equator, after Tanzania. South Africa is a biodiversity hotspot, with unique biomes, plant and animal life. With over 60 million people, the country is the world's 24th-most populous nation and covers an area of . South Africa has three capital cities, with the executive, judicial and legislative branches of government based in Pretoria, Bloemfontein, and Cape Town respectively. The largest city is Johannesburg. About 80% of the population are Black South Afri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Biology (journal)
''Marine Biology'' is a peer-reviewed scientific journal covering research on all aspects of marine biology. The journal was established in 1967 and is published monthly by Springer Science+Business Media. The editor-in-chief is Ulrich Sommer ( Helmholtz Centre for Ocean Research). According to the ''Journal Citation Reports'', the journal has a 2014 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 2.391. References External links * Biology journals Springer Science+Business Media academic journals English-language journals Publications established in 1967 Marine biology Monthly journals Hybrid open access journals {{biology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilfred Chivell
Wilfred may refer to: * Wilfred (given name), a given name and list of people (and fictional characters) with the name * Wilfred, Indiana, an unincorporated community in the United States * ''Wilfred'' (Australian TV series), a comedy series * ''Wilfred'' (American TV series), a remake of the Australian series * Operation Wilfred, a British Second World War naval operation People with the surname * Harmon Wilfred, stateless businessman in New Zealand * Thomas Wilfred (1889–1968), Danish musician and inventor See also * Wilf * Wilfredo * Wilfrid ( – ), English bishop and saint * Wilfried Wilfried is a masculine German given name derived from Germanic roots meaning "will" and "peace" (''Wille'' and ''Frieden'' in German). The English spelling is Wilfrid. Wilfred and Wifred (also Wifredo) are closely related to Wilfried with the sa ... * Wilford (other) {{disambiguation, surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ragged-tooth Shark
The sand tiger shark (''Carcharias taurus''), gray nurse shark, spotted ragged-tooth shark or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf, from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth of around . They dwell in the waters of Japan, Australia, South Africa, and the east coasts of North and South America. The sand tiger shark also inhabited the Mediterranean Sea, Mediterranean, however it was last seen there in 2003 and is presumed extinct in the region. Despite its common names, it is not closely related to either the tiger shark (''Galeocerdo cuvier'') or the nurse shark (''Ginglymostoma cirratum''). Despite its fearsome appearance and strong swimming ability, it is a relatively placid and slow-moving shark with no confirmed human fatalities. This species has a sharp, pointy head, and a bulky body. The sand tiger's length can reach but is normally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baja California
Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mexico. Before becoming a state in 1952, the area was known as the North Territory of Baja California (). It has an area of (3.57% of the land mass of Mexico) and comprises the northern half of the Baja California Peninsula, north of the 28th parallel, plus oceanic Guadalupe Island. The mainland portion of the state is bordered on the west by the Pacific Ocean; on the east by Sonora, the U.S. state of Arizona, and the Gulf of California; on the north by the U.S. state of California; and on the south by Baja California Sur. The state has an estimated population of 3,769,020 as of 2020, significantly higher than the sparsely populated Baja California Sur to the south, and similar to San Diego County, California, to its north. Over 75% of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadalupe Island Biosphere Reserve
The Guadalupe Island Biosphere Reserve, (Reserva de la Biosfera Isla Guadalupe in Spanish language, Spanish), is located in the Pacific Ocean and is part of Baja California state of Mexico. The Reserve consists of Guadalupe Island and several small islands nearby plus a large expanse of surrounding ocean. The Reserve was created by the government of Mexico on 25 April 2005 and is located from the mainland. The Reserve is in size of which consists of land and the remainder of water. The Guadalupe Island Biosphere Reserve is in the Southern Californian Pacific Marine Ecoregion and recognized as an important site for preserving the biodiversity of marine and bird life and the often-unique island vegetation. In the 19th century the population of marine mammals was decimated by commercial hunters. The vegetation of Guadalupe Island was severely damaged by an excessive population of introduced goats and predation by feral cats has caused the extinction of several endemic bird sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neptune Islands
The Neptune Islands consist of two groups of islands located close to the entrance to Spencer Gulf in South Australia. They are well known as a venue for great white shark tourism. Description The Neptune Islands consists of two groups of islands, the North Neptune Islands and the South Neptune Islands. These both sit on the southern aspect of the Australasian continental shelf separated by a distance of . The North Neptune Islands which are south south-east from the mainland at Cape Catastrophe, consist of a large island of height and a small islet of height located from the main island's north-east point with a combined area of . The South Neptune Islands which are south-south-east from the mainland at Cape Catastrophe are more evenly portioned in height with the northern island being high and the southern island (also known as Lighthouse Island) rising to . The Southern group has an area of . A third feature associated with the overall island group is an outcrop of ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Lincoln
Port Lincoln is a town on the Lower Eyre Peninsula in the Australian state of South Australia. It is situated on the shore of Boston Bay, which opens eastward into Spencer Gulf. It is the largest city in the West Coast region, and is located approximately 280 km as the crow flies from the State's capital city of Adelaide (646 km by road). In June 2019 Port Lincoln had an estimated population of 16,418, having grown at an average annual rate of 0.55% year-on-year over the preceding five years. The city is reputed to have the most millionaires per capita in Australia, as well as claiming to be Australia's "Seafood Capital". History and name The Eyre Peninsula has been home to Aboriginal people for over 40 thousand years, with the Barngarla (eastern Eyre, including Port Lincoln), Nauo (south western Eyre), Wirangu (north western Eyre) and Mirning (far western Eyre) being the predominant original cultural groups present at the time of the arrival of Europeans. The o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neutral Buoyancy
Neutral buoyancy occurs when an object's average density is equal to the density of the fluid in which it is immersed, resulting in the buoyant force balancing the force of gravity that would otherwise cause the object to sink (if the body's density is greater than the density of the fluid in which it is immersed) or rise (if it is less). An object that has neutral buoyancy will neither sink nor rise. In scuba diving, the ability to maintain neutral buoyancy through controlled breathing, accurate weighting, and management of the buoyancy compensator is an important skill. A scuba diver maintains neutral buoyancy by continuous correction, usually by controlled breathing, as neutral buoyancy is an unstable condition for a compressible object in a liquid. History The mathematician Archimedes discovered much of how buoyancy works more than 2000 years ago. In his research, Archimedes discovered that an object is buoyed up by a force equal to the weight of the water displaced by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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