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Scallop Aquaculture
Scallop aquaculture is the commercial activity of cultivating (farming) scallops until they reach a marketable size and can be sold as a consumer product. Wild juvenile scallops, or spat, were collected for growing in Japan as early as 1934. The first attempts to fully cultivate scallops in farm environments were not recorded until the 1950s and 1960s.Shumway SE & Parsons GJ (2006). Scallops: Biology, Ecology and Aquaculture. Elsevier B.V., Amsterdam. Traditionally, fishing for wild scallops has been the preferred practice, since farming can be expensive. However worldwide declines in wild scallop populations have resulted in the growth of aquaculture. Globally the scallop aquaculture industry is now well established, with a reported annual production totalling over 1,200,000 metric tonnes from about 12 species. China and Japan account for about 90% of the reported production. Cultured species There are varying degrees of aquaculture intensity used for different species of scall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placopecten Magellanicus
''Placopecten magellanicus'', previously listed as ''Pecten tenuicostatus'' and as ''Pecten grandis'' and once referred to as the "giant scallop", common names Atlantic deep-sea scallop, deep sea scallop, North Atlantic sea scallop, American sea scallop, Atlantic sea scallop, or sea scallop, is a commercially important pectinid bivalve mollusk native to the northwest Atlantic Ocean. Description The shell has a classic form, with smooth shell and edges, unlike ''Pecten maximus'' (common name the "great scallop" or "king scallop") which has flutes and scalloped edges; size is around , with individuals up to in diameter. The shell is generally pinkish-red in color, with striped variegation to darker shades appearing in many individuals. The adductor muscle itself is large, often in diameter. Like all scallops, ''P. magellanicus'' has photoreceptive eyes along the edge of the pinkish mantle. Range and habitat ''Placopecten magellanicus'' is found on the continental shelf of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broodstock
Broodstock, or broodfish, are a group of mature individuals used in aquaculture for breeding purposes. Broodstock can be a population of animals maintained in captivity as a source of replacement for, or enhancement of, seed and fry numbers.Waples, R.S., and C. Do. 1994. Genetic risk associated with supplementation of Pacific salmonids: Captive broodstock programs. Canadian Journal of Fisheries and Aquatic Science,51(1), 310–329. These are generally kept in ponds or tanks in which environmental conditions such as photoperiod, temperature and pH are controlled. Such populations often undergo conditioning to ensure maximum fry output. Broodstock can also be sourced from wild populations where they are harvested and held in maturation tanks before their seed is collected for grow-out to market sizeFast, A. W. (1994). Effects of broodstock size and source on ovarian maturation and spawning on ''Penaeus monodon'' Fabricius from the Gulf of Thailand. Journal of the World Aquaculture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamorphosis
Metamorphosis is a biological process by which an animal physically develops including birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation. Some insects, fish, amphibians, mollusks, crustaceans, cnidarians, echinoderms, and tunicates undergo metamorphosis, which is often accompanied by a change of nutrition source or behavior. Animals can be divided into species that undergo complete metamorphosis (" holometaboly"), incomplete metamorphosis ("hemimetaboly"), or no metamorphosis (" ametaboly"). Scientific usage of the term is technically precise, and it is not applied to general aspects of cell growth, including rapid growth spurts. Generally organisms with a larva stage undergo metamorphosis, and during metamorphosis the organism loses larval characteristics. References to "metamorphosis" in mammals are imprecise and only colloquial, but historically idealist ideas of transformation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spat (molluscs)
Spawn is the eggs and sperm released or deposited into water by aquatic animals. As a verb, ''to spawn'' refers to the process of releasing the eggs and sperm, and the act of both sexes is called spawning. Most aquatic animals, except for aquatic mammals and reptiles, reproduce through the process of spawning. Spawn consists of the reproductive cells (gametes) of many aquatic animals, some of which will become fertilized and produce offspring. The process of spawning typically involves females releasing ova (unfertilized eggs) into the water, often in large quantities, while males simultaneously or sequentially release spermatozoa (milt) to fertilize the eggs. Most fish reproduce by spawning, as do most other aquatic animals, including crustaceans such as crabs and shrimps, molluscs such as oysters and squid, echinoderms such as sea urchins and sea cucumbers, amphibians such as frogs and newts, aquatic insects such as mayflies and mosquitoes and corals, which are actually small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nodipecten Subnodosus
''Nodipecten subnodosus'' is a species of scallop known by the common name giant lion's paw. It is native to Pacific and Gulf of California coasts of the Baja California Peninsula, Mexico, southward to the western coast of Peru. The giant lion's paw scallop releases both eggs and sperm during each annual spawn. The potential for self-fertilization, coupled with a high fecundity of more than 20 million eggs per spawn per individual contributes to an increased possibility of variance in reproductive success. This species is raised in 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. lot .... Pectinidae Bivalves described in 1835 {{Pectinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flexopecten Flexuosus
''Flexopecten flexuosus'' is a species of bivalve belonging to the family Pectinidae Scallop () is a common name that encompasses various species of marine bivalve mollusks in the taxonomic family Pectinidae, the scallops. However, the common name "scallop" is also sometimes applied to species in other closely related families .... The species is found in Western Europe and Northern Africa. References Pectinidae Bivalves described in 1795 Bivalves of Europe Bivalves of Africa {{Pectinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euvola Vogdesi
''Euvola vogdesi'' is a species of bivalve belonging to the family Pectinidae Scallop () is a common name that encompasses various species of marine bivalve mollusks in the taxonomic family Pectinidae, the scallops. However, the common name "scallop" is also sometimes applied to species in other closely related families .... The species is found on the Pacific Coast of North and Central America. Fossil specimens are known from Mexico and California. Fossil specimens measure on average . References Pectinidae Molluscs of the Pacific Ocean Bivalves described in 1906 {{Pectinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlamys Varia
''Chlamys varia'', also called Mimachlamys varia common name the variegated scallop, is a species of small scallop, a marine bivalve mollusk in the family Pectinidae, the scallops. It occurs in the North Sea, the English Channel, the northeastern Atlantic Ocean and the Red Sea. Shell description The shell of ''Chlamys varia'' comes in a range of colours and variegated patterns including white, pink, red, orange, yellow, or purple, and anything in between. Both valves are convex, rounded or oval, and symmetrical except for the ears on either side of the umbo. They are solid, inequivalve and inequilateral. They have 25 to 35 ribs radiating from the umbo bearing spatulate spines, which are more apparent near the margin. The valves are sculpted by fine concentric lines which show the annual growth rings. The anterior ear is considerably longer than the posterior ear. The right anterior ear has a notch to accommodate the byssus, which anchors the shell in place, and small teeth on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amusium Pleuronectes
''Amusium pleuronectes'' is a species of bivalves belonging to the family Pectinidae. The species is found in Southeastern Asia and Australia. They are edible and sold at wet markets in Malaysia. In Hong Kong Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China ( abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delt ..., the dried product is bought sold for cooking double-stewed soup. References Pectinidae Taxa named by Carl Linnaeus Bivalves described in 1758 Bivalves of Asia Edible molluscs {{Pectinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amusium Balloti
''Ylistrum balloti'', known as Ballot's saucer scallop is found around the waters of Australia. This scallop may live for a maximum of four years, and reach 14 cm in shell length, though more commonly 8 to 9 cm. Well regarded as seafood in Asia and Australia. Distribution and habitat The Ballot's saucer scallop is highly available throughout the Australian coast. A previous record from Indonesia was observed in 1991. A recent report confirmed from Borneo island (Sarawak, Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...) suggested the range is expanding to the north. References Pectinidae Seafood Molluscs described in 1861 {{Bivalve-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patinopecten Caurinus
''Patinopecten caurinus'' is a species of bivalve belonging to the family Pectinidae Scallop () is a common name that encompasses various species of marine bivalve mollusks in the taxonomic family Pectinidae, the scallops. However, the common name "scallop" is also sometimes applied to species in other closely related families .... The species is found in Japan and Western America. References Pectinidae {{Improve categories, date=February 2022 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
