Hermatypic coral 5 stone in the ocean is endangered animals
In the international trade in endangered species Convention ( Con – vention on International Trade in EndangeedSpecies of wild Fauna and Flora ) Appendix I, II clear stone coral purpose all species are two endangered wildlife.
1997 is the International Coral Reef, and called on all human protection from severe degradation of coral reef, coral reef destruction is becoming more serious, the blue desert oasis has become a real desert. According to the” nine seven global coral reef study confirmed” coral reefs worldwide generally suffered damage, of which 95% are caused by human factors, they appeal to save coral reefs.
Recovery of coral reef destruction of the ecosystem has become the focus of attention of the people, because modern coral reefs of the backbone ( or frame ) is a coral reef rock, is the first stone coral reef death. Coral reef ecosystem recovery, is a reef coral communities of prosperous development, stone growth. Therefore, in order to human beings, for the descendants, we should cherish the natural stone, coral reef species protection.
Strictly prohibited the buying and selling, trade, through various government legislation, increase the intensity of hermatypic coral reef protection of stone, the stone corals can develop continuously, to create greater productivity for human sustainable utilization. Coral hardness similar lapis lazuli, brittle fracture, has red, pink, white, black and other colors, with a red top, red coral Hongyan Ruhuo, called” the tree of ancient”. Red coral the majority live in the 100 meters below the sea.
China’s Taiwan and Xiamen near the sea with production, color is pink, limb small. World famous red coral is the origin of the Atlantic and the Mediterranean seabed. Red coral is mainly used for jewelry products ( made into necklaces. Ring or pin etc.), great for carving figures, flowers and other crafts. At present our country market on the red coral, mainly imported from Japan, supply of goods is in short supply, the price expensive.
Coral genus Coelenterata, anthozoa. Their body delicate, bright color is very nice. Coral is made up of many coral ( HYDRA ) aggregation and growth of a group of biological ( but there are a few coral single Hydra ). Living in tropical and subtropical
In the shallow water coral, known as the coral, or shallow coral; another kind of life in the deep sea, is
AHERMATYPIC coral. If the skeletal characteristics can be divided again
Stone for the coral and soft corals. Stone corals secrete calcium carbonate to form a hard with the group’s ability, for the vast majority of hermatypic coral; soft corals don’t secrete large amounts of calcium carbonate skeletons, but replaced with calcareous spicules beam supporting body.
Coral reproduction can be divided into the asexual and sexual reproduction. As the growing season, generally considered emission sperm-egg time and light intensity, temperature, moon, tides and other environmental factors, because the coral species too many, and each of the reproductive season are not the same, so there is no fixed in the reproductive season.
Coral polyps
Corals only hydra-type individuals, a hollow cylinder, a lower attachment on the surfaces of the object, the top export, enclosed by a circle or ring of tentacles. Tentacle to gather food, can make the degree of stretch, there are specialized cells ( spiny cells ), spiny cells stimulated out nematocyst,China National stone
prey to barbed wire paralysis. Egg and sperm by a diaphragm on the reproductive glands to produce, through the mouth into the sea.
Fertilization occurs in the water, sometimes also occur in gastric circular cavity. Normally fertilized only occurs in individuals from different eggs and sperm. The zygote is covered with ciliated planula, can swim. A few days to several weeks after fixing to the fixed surface development for Hydra type body. Can also be budding germ. Bud formation after not with the original Hydra separation. Bud formation and growth continuously, so the formation of groups.
The new polyp growth nowadays old Hydra death, but its skeletal remains in groups. Soft coral, coral and coral blue horny for community life. Each in the group Hydra each have 8 tentacles, gastric bypass cavity having a 8 diaphragm, wherein the 6 diaphragm cilia to flow into the gastrovascular cavity, the other two diaphragm cilia to water extraction gastrovascular cavity.
Skeleton for internal skeleton. Soft corals are widely distributed, the skeleton consists of separate calcareous spicules. Some species are discoid,material quality
others have fingerlike projections. Horny Coral in tropical shallow water in abundance, shape of a ribbon or branching, up to 3 meters in length, including the so-called Horny Coral ( precious coral red coral, coral roses ), can be used as jewelry.
The common types of Mediterranean red coral. Blue coral found in India and Pacific oceans in stone corals reefs, forming 2 metres in diameter. Stone coral is the most well-known, most widely distributed species, or groups of single life. And black corals and coral thorn, divide the number of 6 or a multiple of 6, instead of a feathered tentacles simple. Stone coral, black corals and coral and a thorn relationship of the difference between the anemone is a major bone.
Stone coral found in all oceans, from tidal zone to a depth of 6000 metres. The type of group life, the Hydra diameter 1 to 3 mm. Most of the extant stone coral is light yellow, light brown or olive, according to live in coral and algae on the set. But its skeleton is white.
The largest single battalion body living stone coral belonging to Shi Zhi L., up to 25 cm in diameter around. Stone coral skeleton of a goblet, wrap the hydra, its composition almost pure calcium carbonate. Its growth rate depends on the age, food supply, water temperature and different types. Annular Coral Island and coral reefs from the stone coral skeleton form. The average speed of about 5 mm to 28 mm per year. Common stone coral types include brain coral, mushroom coral, coral and staghorn corals stars,jewelry factory their patterns are named.
Black corals and coral thorn whip, a feather, trees or brush-ruping, distributed in the Mediterranean, West Indies or coastal waters of Panama. ( the left upper and lower right-pipe coral map. Coral tentacle was bright yellow transparent point porphyritic, blooming coral colors beautiful, individual body. Also has tentacles white transparent, its top orange ball, very special, but the smaller diameter of about 3 cm. )
Together a group of coral, its skeleton is expanding constantly, creating thousands of shape, great vitality, colorful coral reefs. This is the famous Great Barrier Reef formed.
Group living corals, their skeleton together, the lumen through the intestinal system together, these groups corals have many” export”, but share a “stomach”. Can build coral reef coral has 500 about a variety of, these reef corals live in shallow waters, within the depth of 50 meters, suitable temperature of 22 to 32 degrees, if the temperature is below 18 degrees could not survive. So in high-latitude areas people can not see coral reefs. Coral tentacles are symmetrically and growth, according to the number of tentacles, which can be divided into 6 coral coral and coral 8 into two subclasses.