Yesso scallop | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Pectinida |
Family: | Pectinidae |
Genus: | Mizuhopecten |
Species: | M. yessoensis |
Binomial name | |
Mizuhopecten yessoensis (Jay, 1857) | |
Synonyms | |
Pecten yessoensisJay, 1857 Contents |
Mizuhopecten yessoensis (Yesso scallop, giant Ezo scallop) is a species of marine bivalve mollusks in the family Pectinidae, the scallops. Its name Yesso/Ezo refers to its being found north of Japan.
Its tissues bioaccumulate algal yessotoxins and are studied extensively.
The Yesso scallop (Mizuhopecten yessoensis) is a cold water marine bivalve species. The valves have a convex center with a smooth exterior shell. On one side it is white and on the other dark brown. [1]
The Yesso scallop is widely distributed along the cold coast of Northern Japan. Scallop cultivation is located in the northern islands of Honshu and Hokkaido, with the Sea of Okhotsk, Saroma Lake and Funka Bay in Hokkaido accounting for more than 80% of the scallop production during the period of 1991 to 2002. [2]
Temperature plays a key role in the timing of spawning and larvae settlement of the Yesso scallop. Generally, the scallops spawn between May 1 to June 9 over the span of 10 days. It was found that the timing for the commencement of spawning is shifted to a later date when the surface temperature of the water remains below 0°C for a prolonged period. In addition, lower temperatures throughout April could potentially influence the onset timing of scallop spawning. Furthermore, the shortening of pre-spawning period (dates between the surface water temperature rise above zero to May 1) may be another contributing factor to the later dates of spawning. On the other hand, the timing of scallop spat settlement is closely related to water temperature too; the colder the pre-spawning period, the later the larvae settlement. The commencement of the Yesso Scallop larvae settlement is typically between June 4 to July 5 over the period of 15 days. [4] The upper limit for scallop development was found to be 18°C. [5]
The growth of scallops also varies with the water temperature. When the water is warm and below 18°C, the scallops tend to grow most rapidly between the age of 2 and 4. On the other hand, they often reach the peak of their growing ability between 3 and 5 years of age in colder environments. Consequently, it was established that the Japanese scallop Mizuhopecten yessoensis experiences the lowest mortality rate between the age of 2 and 5. Starting from the age of 6 to 7, the mortality rate rises dramatically. [5]
The main predators of the Yesso scallops are the sea stars Asterias amurensis and Distolasterias nipon . The scallops are preyed on one after the other, and it was found that smaller scallops are preferred over larger ones. Scallops found in warmer waters are also more likely to be preyed upon. Due to the morphological differences between D. nipon and A. amurensis , D. nipon had a much greater influence on the predation of the Yesso scallops. [7]
The scallops depend on sinking organic matter for food, with detritus being their main source of food. These organic matter are from rivers being drained nearby. Another source of food for the scallops are dissolved organic carbon from phytoplankton production. [8]
In Japan, it is known as hotate-gai, and the adductor muscle is eaten raw as sashimi and sushi. In China, it is sometimes dried to make conpoy , usually described as "Japanese conpoy".
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 within the superfamily Pectinoidea, which also includes the thorny oysters.
Ezo (蝦夷) is the Japanese term historically used to refer to the people and the lands to the northeast of the Japanese island of Honshu. This included the northern Japanese island of Hokkaido, which changed its name from "Ezo" to "Hokkaidō" in 1869, and sometimes included Sakhalin and the Kuril Islands. The word Ezo means "the land of the barbarians" in Japanese.
Conpoy or dried scallop is a type of Cantonese dried seafood product that is made from the adductor muscle of scallops. The smell of conpoy is marine, pungent, and reminiscent of certain salt-cured meats. Its taste is rich in umami due to its high content of various free amino acids, such as glycine, alanine, and glutamic acid. It is also rich in nucleic acids such as inosinic acid, amino acid byproducts such as taurine, and minerals, such as calcium and zinc.
Mori is a town located in Oshima Subprefecture, Hokkaido, Japan.
The Northern Pacific seastar is an invasive species in Australia.
A fish hatchery is a place for artificial breeding, hatching, and rearing through the early life stages of animals—finfish and shellfish in particular. Hatcheries produce larval and juvenile fish, shellfish, and crustaceans, primarily to support the aquaculture industry where they are transferred to on-growing systems, such as fish farms, to reach harvest size. Some species that are commonly raised in hatcheries include Pacific oysters, shrimp, Indian prawns, salmon, tilapia and scallops.
The Pacific oyster, Japanese oyster, or Miyagi oyster is an oyster native to the Pacific coast of Asia. It has become an introduced species in North America, Australia, Europe, and New Zealand.
The Japanese eel is a species of anguillid eel found in Japan, Korea, Taiwan, China, and Vietnam, as well as the northern Philippines. Like all the eels of the genus Anguilla and the family Anguillidae, it is catadromous, meaning it spawns in the sea but lives parts of its life in freshwater. Raised in aquaculture ponds in most countries, the Japanese eel makes up 95% of the commercially sold eel in Japan, the other 5% is shipped over by air to the country from Europe. This food in Japan is called unagi; they are an essential part of the food culture, with many restaurants serving grilled eel called kabayaki. However, presumably due to a combination of overfishing and habitat loss or changing water conditions in the ocean interfering with spawning and the transport of their leptocephali this species is endangered.
Asterias amurensis, also known as the Northern Pacific seastar and Japanese common starfish, is a seastar found in shallow seas and estuaries, native to the coasts of northern China, Korea, far eastern Russia, Japan, Alaska, the Aleutian Islands and British Columbia in Canada. Two forms are recognised: the nominate and formarobusta from the Strait of Tartary. It mostly preys on large bivalve molluscs, and it is mostly preyed on by other species of starfish. Population booms in Japan can affect the harvest of mariculture operations and are costly to combat.
The Ezo salamander, also known as the Hokkaido salamander, Noboribetsu salamander, or Ezo Sanshouo in Japanese is a species of salamander in the family Hynobiidae. Prior to 1923 the species was also classified by the binomial scientific name Satobius retardatus. H. retardatus is endemic to Japan's northernmost prefecture, the island of Hokkaido. The species is a pond-type salamander, and its natural habitats are temperate forests, temperate shrubland, swamps, freshwater marshes, intermittent freshwater marshes, freshwater springs, irrigated land, canals, and ditches.
Pecten novaezelandiae, common name the New Zealand scallop, is a bivalve mollusc of the family Pectinidae, the scallops. Its name is sometimes found misspelt as Pecten novaezealandiae.
Cathepsin F is a protein that in humans is encoded by the CTSF gene.
Ezo (蝦夷) is a Japanese name which historically referred to the lands to the north of the Japanese island of Honshu.
Pecten maximus, common names the great scallop, king scallop, St James shell or escallop, is a northeast Atlantic species of scallop, an edible saltwater clam, a marine bivalve mollusc in the family Pectinidae. This is the type species of the genus. This species may be conspecific with Pecten jacobaeus, the pilgrim's scallop, which has a much more restricted distribution.
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. 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.
South Korea is a major center of aquaculture production, and the world's third largest producer of farmed algae as of 2020.
Sea cucumber stocks have been overexploited in the wild, resulting in incentives to grow them by aquaculture. Aquaculture means the sea cucumbers are farmed in contained areas where they can be cultured in a controlled manner. In China, sea cucumbers are cultured, along with prawns and some fish species, in integrated multi-trophic systems. In these systems, the sea cucumbers feed on the waste and feces from the other species. In this manner, what would otherwise be polluting byproducts from the culture of the other species become a valuable resource that is turned into a marketable product.
The Antarctic scallop is a species of bivalve mollusc in the large family of scallops, the Pectinidae. It was thought to be the only species in the genus Adamussium until an extinct Pliocene species was described in 2016. Its exact relationship to other members of the Pectinidae is unclear. It is found in the ice-cold seas surrounding Antarctica, sometimes at great depths.
The Uchiura Bay or Funka Bay is a bay southeast of the island of Hokkaido in northern Japan. It has also been known as Iburi Bay and Volcano Bay.
Aurelia coerulea or Asian moon jelly is a species of moon jelly in the genus Aurelia. This species is native to the seas off Japan, China, Korea, and California, as well as the Mediterranean and other temperate seas. and they can also be found in coastal areas of China, Korea, California, the Mediterranean and other temperate seas. It is particularly abundant in artificial habitats and sheltered regions. It has a very high reproductive rate which can cause blooming events. A.coerulea blooming causes problems such as impairing fisheries, clogging the nuclear power plants and disrupting the local zooplankton abundance. The chemical compounds the species secretes as a self-defense mechanism can be used for pharmaceutical purposes.