The Pacific geoduck ( ), the scientific name Panopea generosa , is a very large, saltwater shell species that can be eaten in the Hiatellidae family. The common name comes from the word Lushootseed (Nisqually) g? ÃÆ'd? Q .
Geoduck comes from the coastal waters of western Canada and northwest United States. The shells range from 15 cm (5.9 inches) to over 20 cm (7.9 inches) in length, but the very long chiffon makes the shell itself much longer than this: the "neck" or siphons alone can be 1 meter (3.3Ã, ft) in length. Geoduck is the biggest blob digging in the world. It is also one of the longest surviving animals of any kind, with a lifespan of up to 140 years; the oldest has been recorded at the age of 168 years.
Video Geoduck
Etymology
The name geoduck comes from the word Lushootseed (Nisqually) g? ÃÆ'd? Q either a word consisting of the first element of unknown meaning and ? Q means "genitals" (referring to shellfish), or phrases meaning "dig deeper", or perhaps both, as multiple meanings. Sometimes known as duck mud , king of shells , or when translated literally from Chinese, elephant trunks .
Between 1983 and 2010, the scientific name of these shells was confused with the extinct shells, Panopea abrupta (Conrad, 1849), in the scientific literature. Maps Geoduck
Biology
Originally from the west coast of Canada and the northwest coast of the United States (mainly Washington and British Columbia), this marine bivalves mollusk is the largest excavating coil in the world, weighing an average of 1.5 pounds (0.68 kg) in maturity, but specimens weighing more than 15 pounds (6.8 kg) and a length of 2 meters (over 6.5 feet) were unheard of.
The related species, Panopea zelandica , was found in New Zealand and has been commercially harvested since 1989. The largest number comes from the Golden Bay in South Island where 100 tons are harvested in one year. There is growing concern over the increase of parasites in the Puget Sound geoduck population. Whether such microporidium parasite species were introduced by commercial farm is being studied by Sea Grant. Research to date shows their presence.
Geoducks is one of the longest living organisms in the animal kingdom. The oldest recorded specimen is 168 years, but the individual usually lives up to 140 years. A geoduck sucks plankton-containing water through its long chiffon, filters this for food and ejects it out through a separate hole in the siphon. Adult geoducks have several natural predators, which can also contribute to their longevity. In Alaska, sea otters and dogfish have proven capable of uprooting geoducks; starfish also attack and eat open siphon geoduck.
Geoducks is a broadcast spreader. A female geoduck produces about 5 billion eggs in its long life span. However, due to low recruitment rates and high mortality rates for geoduck eggs, larvae, and postdelivery teenagers, the population is slowly recovering. In Puget Sound, research shows that recovery time for harvested channels is 39 years.
The density of biomass in Southeast Alaska was predicted by divers, then a twenty percent increase to account for geoducks was not seen at the time of the survey. This estimate is used to predict the two percent allowed for commercial harvest.
Industry
The world's first geoduck fishery was created in 1970, but the demand for half-forgotten shellfish was low initially due to its texture. In 2011, these shells are sold in China for more than $ 150/lb (US $ 330/kg).
The high geoduck market value has created an industry of US $ 80 million, with harvests occurring in the states of Alaska, Washington, and Oregon as well as the provinces of British Columbia in Canada. This is one of the most closely regulated fisheries in both countries. In Washington, the staff of the Natural Resources Department is on the water constantly monitoring the harvest to ensure revenue is received, and the same applies in Canada where the Underwater Harvesters' Association manages the Canadian Fisheries along with the Canadian Department of Fisheries and Marine. The Washington State Department of Health examines water and meat to ensure shellfish do not filter and retain pollutants, an ongoing problem. With rising prices has come the inevitable problem with hunting, and with it the possibility of some can be harvested from unsafe areas.
In 2007, advances in the test systems for contaminated shells have enabled geoduck harvesters to provide more consistent living clams. The new test system determines the feasibility of the shell from the bed being tested before the fish harvester in the area. The previous method tested the shell after harvest. This progress means that 90 percent of shellfish were delivered directly to the market in 2007. In 2001, only 10 percent were alive. Because geoduck has a much higher market value - an additional $ 2 to $ 3 per pound - this development has helped stimulate a thriving industry.
Environmental impact
The practice of farming and farming Geoduck controversial herbs, and has created conflicts with coastline property owners, and the concerns of nongovernmental organizations. However, the Environmental Defense Fund has found that bivalves (oysters, shellfish, and shellfish) are beneficial to the marine environment. Water should be of good quality to plant geodesy commercially. The regulation was mandated in 2007. Studies have been funded to determine short-and long-term environmental and genetic impacts. In southern Puget Sound, the influence of geoduck farming on large animals moves unclear. A 2004 biological review concept, commissioned by the three largest commercial shell companies in the Puget Sound region, identified no long-term effects of geoduck farming on endangered or endangered species.
Culinary used
Large chopsticks and fat are very valuable because it tastes a tasty and crunchy texture. Geoduck is considered by some as an aphrodisiac because of its phallic form. It is very popular in China, where it is considered a delicious meal, mostly eaten in a Chinese hot pot. In Korean cuisine, geoducks are eaten raw with a spicy chilli sauce, sautÃÆ' Â © ed, or in soup and stew. In Japan, geoduck is prepared as raw sashimi, dipped in soy sauce and wasabi. On the Japanese menu at cheaper sushi restaurants, geoduck is sometimes replaced with Tresus keenae , a horse shell, and labeled mirugai or mirukuigai . It is considered to have a texture similar to that of the ark shell (known in Japanese as akagai ). Mirugai is sometimes translated into English as "giant clam", and is distinguished from himejako sushi, made from Tridacna gigas .
Chinese import ban
In December 2013, China imposed a ban on geoduck and other "double-skinned animals" - such as shellfish, oysters, shellfish and shellfish - imported from the west coast of the United States. Chinese officials find in a high-level delivery of saksitoxin, a natural product that can accumulate shellfish, which, when eaten by humans, can cause serious illness or even death. Companies that export product claims that Chinese inspectors use more stringent standards than those deemed safe for human consumption. Shipments from Washington state of arsenic. The ban was imposed for less than 6 months, ending in May 2014.
References
External links
- Man and Mollusc - The Geoduck Fact
- Geoduck.org; Underwater Harvester's Association
- Geoduck.org: UHA - BC Seafood Alliance,
- Geoducks Evergreen State College page
- Fisheries and Oceans Canada - Geoduck clam ( Panopea abrupta ) - Anatomy, Histology, Development, Pathology, Parasites, and Symbionts .
- "Duckumentary" movie Home Page: "3 Feet Below - Dig Deep for Geoduck Clam"
- Geoduck cooking Recipes
Source of the article : Wikipedia
0 Comments