Biological reproduction:
The breeding speed of king crabs is amazing, and each female crab can produce nearly 10 thousand live crabs every year. King crabs usually lay eggs in shoals about 350 meters away from April to June every year. Most of these creatures live in shallow mud and sand and inhabit low-latitude waters.
During the breeding season, the female king crab and the male king crab hatch after mating. Generally speaking, the growth period of king crab is 4 years in its life span of about 30 years.
The hatching rate of eggs is about 16000/80000.
Species:
At present, there are about 1 13 species of king crabs, which belong to 14 genera:
King crab (4)
Cryptolithus brevis
Paederus Xilingol League
Typical cryptoliths
Lithocarpus evansi
King crab of Chile
Taiwan Province stone crab
Quercus longispinosa
Norwegian cancer
King Crab in paget Bay
Neolithic fishes
Trichoderma grimaldii is a Paratrichoderma.
California cancer
Conley flounder in kamchatka peninsula.
Platypus (crab)
King crab (4)
Heterospina salamander
Paralichthys olivaceus
Paralichthys pacificus
The difference between king crab and king crab;
Many people can't tell the king crab from the king crab. In fact, the king crab generally refers to the Kamchatka stone crab, not a real crab, belonging to the stone crab family. King crab refers to giant paramecium crab, which is produced in Australia and belongs to brachiopod family. The two should not be confused.
Fishing:
Fishing method:
Trap box
The average annual output of the United States: 6,543,800 tons.
Fishing season:
Bering sea: red and blue king crab: September ~ 10;
Southeast Alaska: 165438+ October (Red King Crab) and February (Golden King Crab)
Like other crabs, the yield of king crabs varies greatly from year to year. 1980 The output of king crab reached a historical record, reaching 60,000 tons. After two years, it dropped to 6000 tons. The average annual output is between 7000- 12000 tons. Biologists in Alaska set fishing quotas for red king crabs and blue king crabs every year. Except for a small amount of fishing in the southeast waters of Alaska, King King Crab can fish in the deep waters of Aleutian Islands all year round, and there is no quota limit.
Fishing record:
20/kloc-in April/February, the Marine Life Aquarium in weymouth, England, bought three crabs from Australian fishermen for exhibition to save some crustaceans. A king crab in Tasmania, whose carapace is about 38 cm wide and weighs 7 kg, is still growing, claiming to be the largest crab ever exhibited in Britain. According to the British "Daily Mail" report, the Australian giant king crab finally escaped from the boiling pot and will be sent to the British aquarium for exhibition. Giant king crabs will be exhibited in Britain, each with only18kg of crab meat. King crab in Tasmania is a delicacy in Australia. Each local crab can have 20 Jin of crab meat, but the aquarium staff still feel sorry for the eaten cancer.
Species threat:
Species threaten Antarctic ecology:
According to the report of Journal of the Royal Society B: Biological Sciences, king crabs may have lived there for 30 to 40 years, and the destructive environmental impact of rising water temperature has led them to climb to a higher place. The lower the Antarctic sea water, the higher the water temperature. So far, the king crab has not migrated to the main part of the continental shelf at a depth of 500 meters. Scientists are worried that if they climb the main continental shelf, it may cause great damage to the ecology. This crab, which is often cooked because of its meat, is huge, which means that it will naturally become the top carnivore in its waters.
The purpose of this diving equipment diving into Palmer's deep sea is to study the marine life there, not to find crabs. With so many crabs found in this area, its regeneration will be amazing. The research team was led by craig smith of the Department of Oceanography, University of Hawaii, Lu Lu badminton. The research team said: "For more than 6.5438+0.4 million years, stone crabs have been reluctant to enter the cold waters of the Antarctic continental shelf. The western part of the Antarctic Peninsula is heating up rapidly, and scientists believe that stone crabs may invade here soon. " A remote-controlled submarine was used to investigate the deep sea of Palmer, a mud bed basin located under the continental shelf of Weddell Sea 120 km, and a large number of regenerated people of stone crabs were found, which provided first-hand evidence for proving that king crabs crossed the Antarctic continental shelf.
They say that the invasion of king crabs will have a serious impact on the ecology. According to a report published in Journal of the Royal Society, Series B: Biological Sciences, the research team stumbled upon this crab. They can observe any marine life through remote-controlled submarines, but they were surprised to find about 6.5438+0.5 million migrating crabs. The submarine also managed to capture a pregnant female crab, from which they concluded that the sea area might soon be occupied by crabs. According to Smith of the University of Hawaii, who is in charge of the research, the most likely reason for the large-scale invasion of king crabs is that warmer sea water flows through the Palmer deep sea once or several times, carrying a large number of young crabs. Once the king crab invades a sea area, it will soon destroy its competitors.
Smith said: "Above the waters where the king crab is located, there are a lot of plants and animals, among which echinoderms include jellyfish, sea lilies and sea cucumbers. We found that none of them live in the waters where sea crabs are located. After we rose 50 to 100 meters, the number of these animals was very small, so we thought that the king crab would venture to shallow water to feed. We think that some echinoderms may become extinct. For a long time, scientists have been worried that the king crab may enter the Antarctic waters. Once this happens, it will cause great damage to the environment. Previously, scientists had only found king crabs on the islands around Antarctica. This animal has spread from Russia to Norway. Although Norwegian fishermen catch a lot of king crabs, it has caused great changes in the seabed environment. At present, fishing in the Antarctic is illegal, but perhaps it can be used as a way to control the king crab's continued invasion.
Identification method:
Is it a crab?
A real crab has four pairs of feet and a pair of crab pliers. The joints of the foot joints bend forward, while the king crab only has three feet and a pair of crab claws (the bigger crab claw is called "killer" and the smaller one is called "feeder", and the feet bend backward.
The real crab is a sprinter, and the king crab is an excellent walker.
Defective product identification:
The meat is blue-undercooked or not thoroughly cleaned, and the crab mortality rate is too high during transportation. The dead crab rate shall not exceed10%;
The crystallization of crab meat shows that freezing is slow after thawing or freezing;
Crab meat is too salty-it doesn't cool enough before freezing.
Low fullness-the fullness of red and blue king crabs is not less than 80%, and that of golden king crabs is not less than 70%.
Net weight (10 kg plus 10% ice coat weight 1 1 kg) is not allowed.
The number of crab legs and crab tongs does not match. For example, a king crab of 20 kg, classified as 9/ 12, should have 18 ~ 24 crab legs, plus a corresponding number of crab claws.
There are too many damages. The damaged products in a 20 kg crab product cannot exceed 1 ~ 1.5 kg.
Save method:
Live crabs can survive for 24 hours in wet and cold environment after leaving water, and frozen crab segments can be stored for 1 year after being properly wrapped in ice coat. The shelf life of fresh king crab is one week; Thaw the crabs for 3 days. Frozen crabs should be kept at-18 degrees, and fresh crabs should be kept at 0 degrees to 1 degrees.
Edible instructions:
Nutritional indicators:
King crab feet are rich in protein, trace elements and other nutrients, which have a good nourishing effect on the body. Eating crabs is beneficial to the recovery of tuberculosis. Traditional Chinese medicine believes that it has the effects of clearing away heat and toxic materials, nourishing bones and marrow, nourishing tendons and promoting blood circulation, dredging meridians, benefiting limbs and joints, nourishing liver yin and invigorating gastric juice. It has a certain therapeutic effect on congestion, injury, jaundice, waist and leg pain, rheumatoid arthritis and other diseases.
In 100g.
Heat: 97 kcal
Protein:19.2g.
Fat: l.5g
Cholesterol: 53 mg
Unsaturated fatty acid (ω-3): 0.1g.
Sodium salt:1072mg
Menu introduction:
King Crab
King crab of Alaska with sesame oil
Ingredients: Alaskan king crab legs, green garlic, Jiang Mo, cooking wine, salt, sugar, rice vinegar, pepper, water starch, sesame oil and water.
Making:
Thaw the leg of Alaskan king crab, cut it into moderate sections, and cut the green garlic into sections.
Add hot oil to the pot, add green garlic and Jiang Mo, stir-fry until fragrant, then add crab legs, and then add 200ml sugar, salt and water.
After the fire boils, simmer until the soup thickens, add other seasonings, thicken with water starch, turn it over a few times, and pour in sesame oil.
Garlic Alaska king crab:
Ingredients: Alaskan king crab legs, garlic, ginger, onion, Chili sauce, salt and oil.
Making:
Thaw the leg of Alaskan king crab and cut it into pieces of appropriate size.
Peel and slice garlic, slice ginger, and cut onion into coarse grains.
Heat oil, add garlic, ginger, onion and Chili sauce, stir-fry until fragrant, then add crab 5 and proper amount of salt.
Add a proper amount of water, cover the pot and stew for 10 minutes, then steam off the excess water with high fire.
Steamed king crab:
King crab lives in the deep sea, so it is far from pollution, with delicious meat and rich nutrition. Here's how to steam the king crab. Very simple and easy to learn!
Ingredients: king crab, ginger
Exercise:
Rinse and put ginger in the pot.
Steam over high heat for fifteen minutes.
After steaming, it is recommended to eat it while it is hot.
In China:
King crabs are not produced in China and the waters around Asia, so most of the king crabs in the China market are imported frozen products. After the king crab is caught on the boat, it is frozen to-18℃ by quick freezing equipment for ultra-low temperature refrigeration, which ensures the freshness and taste of the king crab to the greatest extent and is convenient for storage and long-distance transportation.
Major events:
Blue king crab:
On July 2nd, 20 14 local time, a fisherman named Frank McFarland in Nome, Alaska, USA captured an extremely rare king crab. This king crab is cobalt blue, which is different from the general red king crab.
This rare cobalt blue king crab attracted a large number of local people to watch. McFarlane considered peeling the king crab into specimens. In this regard, Scott Kent, a biologist at Alaska Fishing and Hunting Bureau, said: "Although I don't know why the king crab is cobalt blue, it should not be caused by genetic mutation."