Cabochon Chinese Mitten Crab Oval 18x25 mm on white 30 pieces Lot

Description

18x25 mm cabochon (on white bottom)
- 30 pieces Lot
Real Chinese Mitten Crab - Eriocheir sinensis specimen encased in clear lucite material. The specimen is crystal clear, indestructible and transparent.
Safe,authentic and completely unbreakable product put real Crabe right at your fingertips!
Anyone can safely explore the Crab from every angle.
Length of the crab body is 1.2 cm. (0.5 inch).
Size of the lucite block is 18x25x12 mm (0.7x1.0x0.5 inch).
Weight of the lucite block is 4 g and 20 g with packing box.
Selltotheworld
From all around the world
Cabochon Chinese Mitten Crab Oval 18x25 mm on white 30 pieces Lot
18x25 mm cabochon (on white bottom)
- 30 pieces Lot
Real
Chinese
M
itten
C
rab
-
Eriocheir sinensis
specimen encased in clear lucite material. The specimen is crystal clear, indestructible and transparent.
Safe,authentic and completely unbreakable product put real Crabe right at your fingertips!
Anyone can safely explore the Crab from every angle.
Length of the crab body is 1.2 cm. (0.5 inch).
Size of the lucite block is 18x25x12 mm (0.7x1.0x0.5 inch).
Weight of the lucite block is 4 g and 20 g with packing box.
It can be used for rings, pendants, bracelets and other crafts. And it is also is a very good collectible item for every body.
This is a handmade real animal specimen craft. Each one will be a bit different (specimen size, color and posture) even in the same production batch.
The pictures in the listing are just for reference as we are selling multiple pieces with same pictures.
***
Chinese Mitten Crab -
Eriocheir sinensis
Species Description- Crabs of the genus
Eriocheir
are easily recognized as adults and juveniles by the dense patches of setae (bristles or hairs) on their claws, which are responsible for the name "Mitten Crab". Both males and females have hairy claws, but the patches cover more of the claws in the males. The tips of the claws are white, and the claws are roughly equal in size. The carapace is slightly broader than it is long, and is roughly rectangular, with 4 teeth on its front margin. There is a frontal notch between the eyes. However, there is considerable variability in the frontal margin, which has led taxonomists to name spurious varieties. Legs are about twice as long as the carapace width, and in adults, the outer segments are lined with long hairs. In California, adults of
E. sinensis
reach 80 mm in carapace width. In crabs bigger than 10 mm, sexes can be distinguished by the shape of the abdomen, rounded in females, arrow and triangular in males.
The Chinese mitten crab (Eriocheir sinensis) is a migrating crab which has invaded Europe and, more recently, North America. It contributes to the local extinction of native invertebrates and modifies habitats. As well as causing erosion by its intensive burrowing activity, the crab may cost fisheries and aquaculture industries several of hundreds of thousands of dollars per year by stealing bait and feeding on trapped fish. The female carries 250,000 to 1 million eggs and control strategies such as electrical screens have failed to prevent crab migration.
Description
The main identifying features of
Eriocheir sinensis
are a light brown colour, hairy claws with white tips (normally equal in size) which make the crab appear to be wearing "mittens", a smooth round carapace or body shape, a notch between the eyes, four lateral carapace spines (fourth spine is small), and a maximum carapace width of approximately 3 inches (80mm). The legs of the adult crab are generally more than twice as long as the carapace width.
Similar Species
Eriocheir japonicus, Eriocheir leptognathus, Eriocheir rectus
Occurs in:
estuarine habitats, lakes, riparian zones, water courses, wetlands
Habitat description
Eriocheir sinensis
tolerates a wide range of abiotic conditions. It is found in temperate climates around the world. However the temperature range within these regions is large and laboratory studies indicate the crab is able to tolerate a wide range of temperatures. The Chinese mitten crab has exhibited a remarkable ability to survive in highly modified aquatic habitats, including polluted waters. It reproduce in the brackish waters of estuaries.
General impacts
In Britain zoologists fear that the Chinese mitten crab could both eat and out-compete vulnerable freshwater species. Because there isn't already a freshwater crab in Britain, species like the native crayfish (which is already in decline) are likely to be affected. Since the early 1990s numbers of the crab have mushroomed. The crab, which can travel over dry land, has now spread to many other English rivers. Furthermore there is a lot more available habitat for the crab to invade, increasing its potential for invasiveness in Britain.
The Chinese mitten crab impacts freshwater and estuarine ecosystems on a number of levels; it has an opportunistic diet including algae, detritus, and a variety of macroinvertebrates. Juvenile crabs form dense colonies and create burrows in the intertidal portions of streams, a process which has undermined the integrity of stream banks in both Europe and the USA.
The introduced Chinese mitten crab may have a number of economic impacts. The monetary impact caused by this invader in German waters totals to approximately 80 million Euro since 1912 (Financial impacts). Additional negative impacts in Germany, such as impacts on biodiversity, recruitment of commercial species, and erosion rates are known but cannot be easily quantified. It steals bait and damages fishing gear which hinders commercial and recreational fishing. Crabs may also feed on trapped fish in commercial aquaculture ponds. In California, adult crabs have become a major nuisance to anglers, taking a variety of baits including ghost shrimp and shad. Chinese mitten crabs may also block water intakes in irrigation and water supply schemes. In California, the Chinese mitten crab has disrupted water diversion plants with large numbers of downstream-migrating crabs becoming trapped in holding tanks meant to keep fish out of turbines. This has caused fish mortality and high costs are needed to prevent the crabs entry.
Uses
The Chinese mitten crab is a culinary delicacy in Asia and supports a .25 billion per annum aquaculture industry in China. Crabs have been used as bait for eel fishing, to produce fish meal, cosmetic products and as fertilizer in agriculture.
Geographical range
Native range: The Chinese mitten crab originates, unsurprisingly, from China with a native distribution in the province of Fukien, China (~26°N northwards to the Korean Peninsula ~40°N).
Known introduced range: Its present estimated distribution ranges from Finland through Sweden, Russia, Poland, Germany, the Czech Republic (Prague), the Netherlands, Belgium, England and France. The southernmost Atlantic coast record is the Portugal, but the crab has extended its range
via
the Garonne canal system to Sigean, Languedoc-Roussillon, southern France. The crab has also been reported from North America with reports from the Detroit River and Great Lakes (without establishment) as well as an isolated occurrence from Hawai‘i. Recent evidence suggests that the population in San Francisco bay is steadily on the increase (NHM).
Nutrition
The Chinese mitten crab is an omnivore. Juveniles primarily eat vegetation. As they mature, they increasingly prey upon small invertebrates including worms and clams.
Reproduction
Mitten crabs have been reported to take between 1 and 5 years to attain sexual maturity, with shorter time frames reported from aquaculture populations in southern China, and longer time periods of 4-5 years reported from Germany . The females carry 250,000 to 1 million eggs until hatching, and both sexes die soon after reproduction.
Lifecycle stages
This sizeable crab spends most of its life in rivers, but must migrate to the sea to breed. Once the crabs have mated the males are thought to die, leaving the females to brood the eggs. In the spring the eggs hatch into larvae and after about six to seven weeks these metamorphose into juvenile crabs, which then migrate back up the river into freshwater to complete the life cycle. In China's Yangtze River, mitten crabs have been reported 800 miles upstream from the Yellow Sea.
Item Specifics
Material :
Resin
Type :
Ornament
Country/Region of Manufacture :
China
Modified Item :
No
Handmade :
Yes
Payment
By Paypal
Shipping
Free shipping cost.
We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery.
We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery.
Returns
Returns: We accept returns with any reason in 30 days.
Contact Us
We will answer buyer messages within 24 hours during working days.
Selltotheworld
From all around the world
DESCRIPTION
PAYMENT
SHIPPING
RETURN POLICY
CONTACT US
Cabochon Chinese Mitten Crab Oval 18x25 mm on white 30 pieces Lot
18x25 mm cabochon (on white bottom)
- 30 pieces Lot
Real
Chinese
M
itten
C
rab
-
Eriocheir sinensis
specimen encased in clear lucite material. The specimen is crystal clear, indestructible and transparent.
Safe,authentic and completely unbreakable product put real Crabe right at your fingertips!
Anyone can safely explore the Crab from every angle.
Length of the crab body is 1.2 cm. (0.5 inch).
Size of the lucite block is 18x25x12 mm (0.7x1.0x0.5 inch).
Weight of the lucite block is 4 g and 20 g with packing box.
It can be used for rings, pendants, bracelets and other crafts. And it is also is a very good collectible item for every body.
This is a handmade real animal specimen craft. Each one will be a bit different (specimen size, color and posture) even in the same production batch.
The pictures in the listing are just for reference as we are selling multiple pieces with same pictures.
***
Chinese Mitten Crab -
Eriocheir sinensis
Species Description- Crabs of the genus
Eriocheir
are easily recognized as adults and juveniles by the dense patches of setae (bristles or hairs) on their claws, which are responsible for the name "Mitten Crab". Both males and females have hairy claws, but the patches cover more of the claws in the males. The tips of the claws are white, and the claws are roughly equal in size. The carapace is slightly broader than it is long, and is roughly rectangular, with 4 teeth on its front margin. There is a frontal notch between the eyes. However, there is considerable variability in the frontal margin, which has led taxonomists to name spurious varieties. Legs are about twice as long as the carapace width, and in adults, the outer segments are lined with long hairs. In California, adults of
E. sinensis
reach 80 mm in carapace width. In crabs bigger than 10 mm, sexes can be distinguished by the shape of the abdomen, rounded in females, arrow and triangular in males.
The Chinese mitten crab (Eriocheir sinensis) is a migrating crab which has invaded Europe and, more recently, North America. It contributes to the local extinction of native invertebrates and modifies habitats. As well as causing erosion by its intensive burrowing activity, the crab may cost fisheries and aquaculture industries several of hundreds of thousands of dollars per year by stealing bait and feeding on trapped fish. The female carries 250,000 to 1 million eggs and control strategies such as electrical screens have failed to prevent crab migration.
Description
The main identifying features of
Eriocheir sinensis
are a light brown colour, hairy claws with white tips (normally equal in size) which make the crab appear to be wearing "mittens", a smooth round carapace or body shape, a notch between the eyes, four lateral carapace spines (fourth spine is small), and a maximum carapace width of approximately 3 inches (80mm). The legs of the adult crab are generally more than twice as long as the carapace width.
Similar Species
Eriocheir japonicus, Eriocheir leptognathus, Eriocheir rectus
Occurs in:
estuarine habitats, lakes, riparian zones, water courses, wetlands
Habitat description
Eriocheir sinensis
tolerates a wide range of abiotic conditions. It is found in temperate climates around the world. However the temperature range within these regions is large and laboratory studies indicate the crab is able to tolerate a wide range of temperatures. The Chinese mitten crab has exhibited a remarkable ability to survive in highly modified aquatic habitats, including polluted waters. It reproduce in the brackish waters of estuaries.
General impacts
In Britain zoologists fear that the Chinese mitten crab could both eat and out-compete vulnerable freshwater species. Because there isn't already a freshwater crab in Britain, species like the native crayfish (which is already in decline) are likely to be affected. Since the early 1990s numbers of the crab have mushroomed. The crab, which can travel over dry land, has now spread to many other English rivers. Furthermore there is a lot more available habitat for the crab to invade, increasing its potential for invasiveness in Britain.
The Chinese mitten crab impacts freshwater and estuarine ecosystems on a number of levels; it has an opportunistic diet including algae, detritus, and a variety of macroinvertebrates. Juvenile crabs form dense colonies and create burrows in the intertidal portions of streams, a process which has undermined the integrity of stream banks in both Europe and the USA.
The introduced Chinese mitten crab may have a number of economic impacts. The monetary impact caused by this invader in German waters totals to approximately 80 million Euro since 1912 (Financial impacts). Additional negative impacts in Germany, such as impacts on biodiversity, recruitment of commercial species, and erosion rates are known but cannot be easily quantified. It steals bait and damages fishing gear which hinders commercial and recreational fishing. Crabs may also feed on trapped fish in commercial aquaculture ponds. In California, adult crabs have become a major nuisance to anglers, taking a variety of baits including ghost shrimp and shad. Chinese mitten crabs may also block water intakes in irrigation and water supply schemes. In California, the Chinese mitten crab has disrupted water diversion plants with large numbers of downstream-migrating crabs becoming trapped in holding tanks meant to keep fish out of turbines. This has caused fish mortality and high costs are needed to prevent the crabs entry.
Uses
The Chinese mitten crab is a culinary delicacy in Asia and supports a .25 billion per annum aquaculture industry in China. Crabs have been used as bait for eel fishing, to produce fish meal, cosmetic products and as fertilizer in agriculture.
Geographical range
Native range: The Chinese mitten crab originates, unsurprisingly, from China with a native distribution in the province of Fukien, China (~26°N northwards to the Korean Peninsula ~40°N).
Known introduced range: Its present estimated distribution ranges from Finland through Sweden, Russia, Poland, Germany, the Czech Republic (Prague), the Netherlands, Belgium, England and France. The southernmost Atlantic coast record is the Portugal, but the crab has extended its range
via
the Garonne canal system to Sigean, Languedoc-Roussillon, southern France. The crab has also been reported from North America with reports from the Detroit River and Great Lakes (without establishment) as well as an isolated occurrence from Hawai‘i. Recent evidence suggests that the population in San Francisco bay is steadily on the increase (NHM).
Nutrition
The Chinese mitten crab is an omnivore. Juveniles primarily eat vegetation. As they mature, they increasingly prey upon small invertebrates including worms and clams.
Reproduction
Mitten crabs have been reported to take between 1 and 5 years to attain sexual maturity, with shorter time frames reported from aquaculture populations in southern China, and longer time periods of 4-5 years reported from Germany . The females carry 250,000 to 1 million eggs until hatching, and both sexes die soon after reproduction.
Lifecycle stages
This sizeable crab spends most of its life in rivers, but must migrate to the sea to breed. Once the crabs have mated the males are thought to die, leaving the females to brood the eggs. In the spring the eggs hatch into larvae and after about six to seven weeks these metamorphose into juvenile crabs, which then migrate back up the river into freshwater to complete the life cycle. In China's Yangtze River, mitten crabs have been reported 800 miles upstream from the Yellow Sea.
Item Specifics
Material :
Resin
Type :
Ornament
Country/Region of Manufacture :
China
Modified Item :
No
Handmade :
Yes
Payment
By Paypal
Shipping
Free shipping cost.
We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery.
We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery.
Returns
Returns: We accept returns with any reason in 30 days.
Contact Us
We will answer buyer messages within 24 hours during working days.
All right reserved.
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