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Ark Clam
Ark clam is the common name for a family of small to large-sized saltwater clams or marine bivalve molluscs in the family Arcidae. Ark clams vary both in shape and size. They number about 200 species worldwide. The shells of ark clams are often white or cream, but in some species, the shell is striped with, tinted with, or completely colored, a rich brown. In life the shell of most species has a top shell layer that is thick brown periostracum affixed to the harder calcareous part of the shell. In some species such as '' Barbatia'', this outer horny covering is tufted at the end of the shell into something that resembles a beard, hence the name ''Barbatia'' or bearded one. The group is known as "ark shells" because species such as '' Arca'' have a large flat area between the umbones which, in an undamaged shell, somewhat resembles a deck, with the rest of the shell perhaps illustrating an ancient wooden boat such as Noah's ark is thought to have been. All ark shells have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve (mollusc)
A valve is each articulating part of the shell of a mollusc or another multi-shelled animal such as brachiopods and some crustaceans. Each part is known as a valve or in the case of chitons, a "plate". Members of two classes of molluscs, the Bivalvia (clams) and the Polyplacophora (chitons), have valves. Species within one family of very unusual small sea snails, marine opisthobranch gastropods in the family Juliidae, also have two articulating shells or valves, which resemble those of a bivalve. This exceptional family is commonly known as the bivalved gastropods. Gastropods in general are sometimes called "univalves", because in those that have a shell, the shell is usually in one part. Chitons The valves of chitons are eight dorsal, articulated shell plates, which are frequently coloured and sculpted. After death the girdle that holds the plates together disintegrates and the plates separate. Thus individual plates can be found washed up in beach drift, as shown in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deck (ship)
A deck is a permanent covering over a compartment or a hull of a ship. On a boat or ship, the primary or upper deck is the horizontal structure that forms the "roof" of the hull, strengthening it and serving as the primary working surface. Vessels often have more than one level both within the hull and in the superstructure above the primary deck, similar to the floors of a multi-storey building, that are also referred to as decks, as are certain compartments and decks built over specific areas of the superstructure. Decks for some purposes have specific names. Structure The main purpose of the upper or primary deck is structural, and only secondarily to provide weather-tightness and support people and equipment. The deck serves as the lid to the complex box girder which can be identified as the hull. It resists tension, compression, and racking forces. The deck's scantling is usually the same as the topsides, or might be heavier if the deck is expected to carry heavier l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shell Mound
A midden (also kitchen midden or shell heap) is an old dump for domestic waste which may consist of animal bone, human excrement, botanical material, mollusc shells, potsherds, lithics (especially debitage), and other artifacts and ecofacts associated with past human occupation. These features provide a useful resource for archaeologists who wish to study the diets and habits of past societies. Middens with damp, anaerobic conditions can even preserve organic remains in deposits as the debris of daily life are tossed on the pile. Each individual toss will contribute a different mix of materials depending upon the activity associated with that particular toss. During the course of deposition sedimentary material is deposited as well. Different mechanisms, from wind and water to animal digs, create a matrix which can also be analysed to provide seasonal and climatic information. In some middens individual dumps of material can be discerned and analysed. Shells A shell m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fujian
Fujian (; alternately romanized as Fukien or Hokkien) is a province on the southeastern coast of China. Fujian is bordered by Zhejiang to the north, Jiangxi to the west, Guangdong to the south, and the Taiwan Strait to the east. Its capital is Fuzhou, while its largest city by population is Quanzhou, both located near the coast of the Taiwan Strait in the east of the province. While its population is predominantly of Chinese ethnicity, it is one of the most culturally and linguistically diverse provinces in China. The dialects of the language group Min Chinese were most commonly spoken within the province, including the Fuzhou dialect of northeastern Fujian and various Hokkien dialects of southeastern Fujian. Hakka Chinese is also spoken, by the Hakka people in Fujian. Min dialects, Hakka and Mandarin Chinese are mutually unintelligible. Due to emigration, a sizable amount of the ethnic Chinese populations of Taiwan, Singapore, Malaysia, Indonesia, and the Phi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquaculture
Aquaculture (less commonly spelled aquiculture), also known as aquafarming, is the controlled cultivation ("farming") of aquatic organisms such as fish, crustaceans, mollusks, algae and other organisms of value such as aquatic plants (e.g. lotus). Aquaculture involves cultivating freshwater, brackish water and saltwater populations under controlled or semi-natural conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish. Mariculture, commonly known as marine farming, refers specifically to aquaculture practiced in seawater habitats and lagoons, opposed to in freshwater aquaculture. Pisciculture is a type of aquaculture that consists of fish farming to obtain fish products as food. Aquaculture can also be defined as the breeding, growing, and harvesting of fish and other aquatic plants, also known as farming in water. It is an environmental source of food and commercial product which help to improve healthier habitats and used to re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tegillarca Granosa
''Tegillarca granosa'' (also known as ''Anadara granosa'') is a species of ark clam known as the blood cockle or blood clam due to the red haemoglobin liquid inside the soft tissues. It is found throughout the Indo-Pacific region from the eastern coast of South Africa northwards and eastwards to Southeast Asia, Australia, Polynesia, and up to northern Japan. It lives mainly in the intertidal zone at one to two metres water depth, burrowed down into sand or mud. Adult size is about 5 to 6 cm long and 4 to 5 cm wide. Right and left valve of the same specimen: File:Tegillarca granosa 01.jpg, Right valve File:Tegillarca granosa 02.jpg, Left valve It has a high economic value as food, and it is kept in aquaculture. On the coast of Zhejiang Province alone, blood cockle plantations occupy around 145,000 '' mu'' (about 100 km2) of mudflats. These clams are raised in the river estuaries of the neighboring Fujian Province as well. Ruǎn Jīnshān; Li Xiùzhū; Lín Kèb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anadara Granosa
''Tegillarca granosa'' (also known as ''Anadara granosa'') is a species of ark clam known as the blood cockle or blood clam due to the red haemoglobin liquid inside the soft tissues. It is found throughout the Indo-Pacific region from the eastern coast of South Africa northwards and eastwards to Southeast Asia, Australia, Polynesia, and up to northern Japan. It lives mainly in the intertidal zone at one to two metres water depth, burrowed down into sand or mud. Adult size is about 5 to 6 cm long and 4 to 5 cm wide. Right and left valve of the same specimen: File:Tegillarca granosa 01.jpg, Right valve File:Tegillarca granosa 02.jpg, Left valve It has a high economic value as food, and it is kept in aquaculture. On the coast of Zhejiang Province alone, blood cockle plantations occupy around 145,000 '' mu'' (about 100 km2) of mudflats. These clams are raised in the river estuaries of the neighboring Fujian Province as well. Ruǎn Jīnshān; Li Xiùzhū; Lín Kèb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blood Cockle
''Tegillarca granosa'' (also known as ''Anadara granosa'') is a species of ark clam known as the blood cockle or blood clam due to the red haemoglobin liquid inside the soft tissues. It is found throughout the Indo-Pacific region from the eastern coast of South Africa northwards and eastwards to Southeast Asia, Australia, Polynesia, and up to northern Japan. It lives mainly in the intertidal zone at one to two metres water depth, burrowed down into sand or mud. Adult size is about 5 to 6 cm long and 4 to 5 cm wide. Right and left valve of the same specimen: File:Tegillarca granosa 01.jpg, Right valve File:Tegillarca granosa 02.jpg, Left valve It has a high economic value as food, and it is kept in aquaculture. On the coast of Zhejiang Province alone, blood cockle plantations occupy around 145,000 '' mu'' (about 100 km2) of mudflats. These clams are raised in the river estuaries of the neighboring Fujian Province as well. Ruǎn Jīnshān; Li Xiùzhū; Lín Kèb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caribbean
The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Sea and the North Atlantic Ocean) and the surrounding coasts. The region is southeast of the Gulf of Mexico and the North American mainland, east of Central America, and north of South America. Situated largely on the Caribbean Plate, the region has more than 700 islands, islets, reefs and cays (see the list of Caribbean islands). Island arcs delineate the eastern and northern edges of the Caribbean Sea: The Greater Antilles and the Lucayan Archipelago on the north and the Lesser Antilles and the on the south and east (which includes the Leeward Antilles). They form the West Indies with the nearby Lucayan Archipelago ( the Bahamas and Turks and Caicos Islands), which are considered to be part of the Caribbean despite not bor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arca Zebra
''Arca zebra'', or the turkey wing ark clam (or simply turkey wing), is a bivalve mollusc in the family Arcidae, the ark clams. Description Distribution This species is found along the Atlantic coast of North America, ranging from North Carolina to the West Indies and Bermuda. It attaches itself to rocks or other hard substrates in shallow water with byssus threads. Morphology The shell of ''Arca zebra'' is boldly striped in brown and white which gives it a resemblance to the wing of a wild turkey. The whole shell (when both valves are together) has also been likened to Noah's Ark. It is a sturdy shell growing up to 4 in (10 cm) long and 2 in wide. The umbones are separated by a shallow depression, and the hinge is long and straight with about 50 small teeth. There is coarse sculpturing fanning out from the umbones. The inside of the shell is whitish or pale mauve. File:Arca zebra 01.jpg, Right valve File:Arca zebra 02.jpg, Left valve Ecology Feeding ''Arca zebr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camouflage
Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include the leopard's spotted coat, the battledress of a modern soldier, and the leaf-mimic katydid's wings. A third approach, motion dazzle, confuses the observer with a conspicuous pattern, making the object visible but momentarily harder to locate, as well as making general aiming easier. The majority of camouflage methods aim for crypsis, often through a general resemblance to the background, high contrast disruptive coloration, eliminating shadow, and countershading. In the open ocean, where there is no background, the principal methods of camouflage are transparency, silvering, and countershading, while the ability to produce light is among other things used for counter-illumination on the undersides of cephalopods such as squid. Some animals, such as chameleons and octo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuculanidae
Nuculanidae is a family of small saltwater clams, marine bivalve molluscs in the order Nuculanida. Species in this family are found in all seas, from shallow to deep water. Genera and species Genera and species within the family Nuculanidae include: * '' Acutispinula'' ** '' Acutispinula hilleri'' (Allen & Sanders, 1982) ** '' Acutispinula scheltemai'' (Allen & Sanders, 1982) * '' Adrana'' H. Adams & A. Adams, 1858 * '' Jupiteria'' ** '' Jupiteria manawatawhia'' Powell, 1937) ** '' Jupiteria wolffi'' Dell, 1956 ** '' Jupiteria zealedaformis'' Dell, 1953 * '' Ledella'' ** '' Ledella aberrata'' Allen & Sanders, 1996 ** '' Ledella finlayi'' Powell, 1935 ** '' Ledella herdmani'' Dell, 1953 ** '' Ledella jamesi'' Allen & Hannah, 1989 ** '' Ledella librata'' Dell, 1952 ** '' Ledella pustulosa'' Allen & Hannah, 1989 ** '' Ledella sublevis'' A. E. Verrill & Bush, 1898 ** '' Ledella ultima'' ( E. A. Smith, 1885) * '' Lembulus'' Link, 1807 ** '' Lembulus pellus'' (Linnaeus, 1767 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
