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Alaskan King Crab Fishing
Alaskan king crab fishing is carried out during the fall in the waters off the coast of Alaska and the Aleutian Islands. The commercial catch is shipped worldwide. Large numbers of king crab are also caught in Russian and international waters. In 1980, at the peak of the king crab industry, Alaskan fisheries produced up to of crab. However, by 1983, the total size of the catch had dropped by up to 90% in some places. Several theories for the precipitous drop in the crab population have been proposed, including overfishing, warmer waters, and increased fish predation. As a result, the current season is very short and in the 2010 season, only of red king crab were landed. Alaskan crab fishing is very dangerous, and the fatality rate among the fishermen is about 80 times the fatality rate of the average worker. It is suggested that, on average, one crab fisherman dies weekly during the seasons.Christie, LesAmerica’s most dangerous jobs Retrieved on April 28, 2007 Types of comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bering Sea
The Bering Sea (, ; rus, Бе́рингово мо́ре, r=Béringovo móre) is a marginal sea of the Northern Pacific Ocean. It forms, along with the Bering Strait, the divide between the two largest landmasses on Earth: Eurasia and The Americas. It comprises a deep water basin, which then rises through a narrow slope into the shallower water above the continental shelves. The Bering Sea is named for Vitus Bering, a Danish navigator in Russian service, who, in 1728, was the first European to systematically explore it, sailing from the Pacific Ocean northward to the Arctic Ocean. The Bering Sea is separated from the Gulf of Alaska by the Alaska Peninsula. It covers over and is bordered on the east and northeast by Alaska, on the west by the Russian Far East and the Kamchatka Peninsula, on the south by the Alaska Peninsula and the Aleutian Islands and on the far north by the Bering Strait, which connects the Bering Sea to the Arctic Ocean's Chukchi Sea. Bristol Bay is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chionoecetes Bairdi
''Chionoecetes bairdi'' is a species of snow crab, alternatively known as bairdi crab and tanner crab. ''C. bairdi'' is closely related to ''Chionoecetes opilio'', and it can be difficult to distinguish ''C. opilio'' from ''C. bairdi''. Both species are found in the Bering Sea and are sold commercially under the name "Snow crab." Tanner crabs have suffered from overfishing and as a result strict controls have been placed on tanner crab fisheries. It was named by Mary Jane Rathbun, a Smithsonian employee who became one of the leading authorities on crab taxonomy. She named the crab for Spencer Baird, her mentor, who in the 1880s as Secretary of the Smithsonian Institution and head of the United States Fish Commission, had given her her first position. Biology Tanner crabs are considered a short-tailed or "true" crab. They are decapods with pincer claws on their frontmost pair of legs. They can live over a decade with most adults reaching by the time they reach adulthood, usu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chionoecetes Opilio
''Chionoecetes opilio'', a species of snow crab, also known as opilio crab or opies, is a predominantly epifaunal crustacean native to shelf depths in the northwest Atlantic Ocean and north Pacific Ocean. It is a well-known commercial species of ''Chionoecetes'', often caught with traps or by trawling. Seven species are in the genus ''Chionoecetes'', all of which bear the name "snow crab". ''C. opilio'' is related to '' C. bairdi'', commonly known as the tanner crab, and other crab species found in the cold, northern oceans. Anatomy Snow crabs have equally long and wide carapaces, or protective shell-coverings, over their bodies. Their tubercles, or the bodily projections on their shells, are moderately enclosed in calcium deposits, and they boast hooked setae, which are rigid, yet springy, hair-like organs on their claws. Snow crabs have a horizontal rostrum at the front of the carapace; the rostrum is basically just an extension of the hard, shell covering of the carapace an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chionoecetes
''Chionoecetes'' is a genus of crabs that live in the northern Pacific and Atlantic Oceans. The genus ''Chionoecetes'' currently contains seven distinct species. Other names for crabs in this genus include "queen crab" (in Canada) and " spider crab" – they are known by different names in different areas of the world. The generic name ''Chionoecetes'' means snow (, ') inhabitant (, '); ' means shepherd, and '' C. opilio'' is the primary species referred to as snow crab. Marketing strategies, however, employ snow crab for any species in the genus ''Chionoecetes''. The name "snow crab" refers to their being commonly found in cold northern oceans. General Snow crab are caught as far north as the Arctic Ocean, from Newfoundland to Greenland and north of Norway in the Atlantic Ocean, and across the Pacific Ocean, including the Sea of Japan, the Bering Sea, the Gulf of Alaska, Norton Sound, and even as far south as California for ''Chionoecetes bairdi''. In 2019 the Norwegian Supr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pound (mass)
The pound or pound-mass is a unit of mass used in British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly , and which is divided into 16 avoirdupois ounces. The international standard symbol for the avoirdupois pound is lb; an alternative symbol is lbm (for most pound definitions), # ( chiefly in the U.S.), and or ″̶ (specifically for the apothecaries' pound). The unit is descended from the Roman (hence the abbreviation "lb"). The English word ''pound'' is cognate with, among others, German , Dutch , and Swedish . These units are historic and are no longer used (replaced by the metric system). Usage of the unqualified term ''pound'' reflects the historical conflation of mass and weight. This accounts for the modern distinguishing terms ''pound-mass'' and '' pound-force''. Etymology The word 'pound' and its cognates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenhorn , a widespread geologic unit in the plains and mountainous Western United States
{{disambiguation, geo ...
Greenhorn is a slang for an inexperienced person, or a slur against Portuguese people in New England, United States. It may also refer to: Places * Greenhorn, California, United States * Greenhorn Mountain, a mountain in Colorado * Greenhorn, Oregon, United States Other * The Greenhornes, a rock band from Cincinnati, Ohio * Greenhorn Limestone The Greenhorn Limestone or Greenhorn Formation is a geologic formation in the Great Plains Region of the United States, dating to the Cenomanian and Turonian ages of the Late Cretaceous period. The formation gives its name to the Greenhorn cycle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cannibalism
Cannibalism is the act of consuming another individual of the same species as food. Cannibalism is a common ecological interaction in the animal kingdom and has been recorded in more than 1,500 species. Human cannibalism is well documented, both in ancient and in recent times. The rate of cannibalism increases in nutritionally poor environments as individuals turn to members of their own species as an additional food source.Elgar, M.A. & Crespi, B.J. (1992) ''Cannibalism: ecology and evolution among diverse taxa'', Oxford University Press, Oxford ngland New York. Cannibalism regulates population numbers, whereby resources such as food, shelter and territory become more readily available with the decrease of potential competition. Although it may benefit the individual, it has been shown that the presence of cannibalism decreases the expected survival rate of the whole population and increases the risk of consuming a relative. Other negative effects may include the increased r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buoy
A buoy () is a floating device that can have many purposes. It can be anchored (stationary) or allowed to drift with ocean currents. Types Navigational buoys * Race course marker buoys are used for buoy racing, the most prevalent form of yacht racing and power boat racing. They delimit the course and must be passed to a specified side. They are also used in underwater orienteering competitions. * Emergency wreck buoys provide a clear and unambiguous means of temporarily marking new wrecks, typically for the first 24–72 hours. They are coloured in an equal number of blue and yellow vertical stripes and fitted with an alternating blue and yellow flashing light. They were implemented following collisions in the Dover Strait in 2002 when vessels struck the new wreck of the . * Ice marking buoys mark holes in frozen lakes and rivers so snowmobiles do not drive over the holes. * Large Navigational Buoys (LNB, or Lanby buoys) are automatic buoys over 10 m high equipped wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden King Crab
''Lithodes aequispinus'', the golden king crab, also known as the brown king crab, is a king crab species native to the North Pacific. Golden king crabs are primarily found in the Aleutian Islands and waters nearer to Alaska and British Columbia; their range also extends to the Russian far east and Japan, albeit with a less dense population. Golden king crabs are the smallest of the three commercially viable Alaskan king crab species with an average weight between 5 and 8 lbs(2.3 - 3.6 kg); the other two species being the blue and red king crabs. Golden king crabs were historically caught incidentally in red king crab fisheries, but the first commercial landing took place in 1975; in 1981, the targeted pot-fishing method, a hybrid fishing method specifically for golden king crab, was developed. Description The golden king crab is a North Pacific king crab, a decapod crustacean. They have five pairs of legs, the front pair carries their claws. Golden king crabs get th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intertidal Zone
The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species of life, such as seastars, sea urchins, and many species of coral with regional differences in biodiversity. Sometimes it is referred to as the ''littoral zone'' or '' seashore'', although those can be defined as a wider region. The well-known area also includes steep rocky cliffs, sandy beaches, bogs or wetlands (e.g., vast mudflats). The area can be a narrow strip, as in Pacific islands that have only a narrow tidal range, or can include many meters of shoreline where shallow beach slopes interact with high tidal excursion. The peritidal zone is similar but somewhat wider, extending from above the highest tide level to below the lowest. Organisms in the intertidal zone are adapted to an environment of harsh extremes, living in water p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Floor
The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean. All floors of the ocean are known as 'seabeds'. The structure of the seabed of the global ocean is governed by plate tectonics. Most of the ocean is very deep, where the seabed is known as the abyssal plain. Seafloor spreading creates mid-ocean ridges along the center line of major ocean basins, where the seabed is slightly shallower than the surrounding abyssal plain. From the abyssal plain, the seabed slopes upward toward the continents and becomes, in order from deep to shallow, the continental rise, slope, and shelf. The depth within the seabed itself, such as the depth down through a sediment core, is known as the “depth below seafloor.” The ecological environment of the seabed and the deepest waters are collectively known, as a habitat for creatures, as the “benthos.” Most of the seabed throughout the world's oceans is covered in layers of marine sediments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
