Christmas Island Red Crab s Road to Love Read Answers

Forehead. I would also like to ask this question .........

On Christmas Island in the eastern Indian Ocean, there are more than 100 million crabs, half of which are red crabs.

In October, when Christmas Island enters the rainy season, the red crabs dormant in their burrows seem to hear the call of love, and they begin to get out of the house and crawl to the beach to build a nest and find a mate. Red crabs choose this season to go on a blind date, which is not only conducive to the moisturizing of the body, but also the high tide at this time can also smoothly bring the eggs released by the female crab into the sea. Less than 3 kilometers from the habitat to the beach by the sea, this is a necessary passage for red crabs to find love, and it is also a difficult journey full of dangers.

The red crab is on the road, and the overwhelming and mighty red crab is like a moving red carpet. They take advantage of the shade of the early morning to set off from the woods at a speed of 700 meters per hour. By the time the red crabs crawled out of the woods, the scorching equatorial sun had been waiting for them for a long time.

It seems that they have entered the oven at more than 50 degrees Celsius all at once, and the scorching sunlight quickly evaporates the water on their bodies. In order not to be roasted dry, they picked up their speed and crawled towards the sea.

However, the old, weak, and crippled crabs crawling behind the team could not withstand this "roasting" test, and their bodies were quickly dehydrated due to exposure, and they could no longer crawl, and could only run aground forever on the road to the beach with a desire for love.

The surviving red crabs still can't let up, because they are about to face the next test of life and death: it is a few railroad tracks that carry ore, lying on their way. These shiny rails, which can reach 80 degrees Celsius under the sun's baking, are tantamount to being burned by cannons, so the red crabs must be fast when crossing these tracks.

And those red crabs with weak legs and feet and slow crawling speed will be burned to the point of smoke. Every time a school of crabs passes near the railroad tracks, a large number of corpses are left behind, and each dead red crab is still crawling in the direction of the beach.

After passing the railroad tracks, the beach is only a hundred meters away. But they have one last test of life and death, because they have to cross a highway. Red crabs with better fate, if there are no cars on the road, even if they pass the customs smoothly.

And there will always be some ill-fated ones who will be crushed under the wheels of fast-moving cars. During the annual migration season, thousands of red crabs are crushed to death, and on the black road, the red crabs paint patches of tragic red with their lives.

After this baptism of light and heat, the test of life and death, when the red crabs finally reached the beach, their numbers were numbered. They build nests on the beach and mate to lay eggs. According to statistics, more than 5 million red crabs sleep on this road of less than 3 kilometers every year, which accounts for one-tenth of the red crab population on the island.

For the sake of the short love covenant on the seaside, for the reproduction of the next generation, the red crabs have died one after another, which is amazing.

This is a dangerous road to death, but the love and responsibility of Red Crab make it a brilliant and moving road of love.

Because the red crabs on Christmas Island have a very toxic and corrosive formic acid stored in their bodies!

But there is a very toxic and corrosive formic acid stored inside!

Because red crabs have a special toxin in their body.

The back of the cephalothorax is covered with a cephalothorax, and the width of the shell is about centimeters. The frontal part has a pair of antennae, and the outer side is a stalked compound eye. The mouthparts include 1 pair of large jaws, 2 pairs of small jaws, and 3 pairs of jaw feet.

There are 5 pairs of breasts and feet on both sides of the cephalothorax. The abdomen is vestigial, flattened, and zigzags on the ventral surface of the cephalothorax. The abdomen of males is narrow and long, mostly triangular, and only the first two pairs of appendages are deformed into joints; The female has a broad abdomen, with 1 pair of double-branched appendages in each of the 2nd and 5th segments, densely covered with bristles, which are used to hold eggs.

Marine life, with the largest number of species in the shallow tropical sea. Omnivorous. The back shell is black, and the belly and limbs are red, like a roasted lobster; The limbs are short and thick, and the meat is abundant, which is a superior delicacy.

It is a land crab that can only be found on Christmas Island and Cocoa Island in the Indian Ocean.

It cannot be eaten, there is a special toxic formic acid in the body, and eating it will cause damage to the human intestinal mucosa.

Otherwise, so many migratory crabs would have been eaten up every year.

Australian red crabs mainly live on Christmas Island (Christmas Island), migrating red crabs gather on the beach, Australian red crabs mainly eat fallen leaves, fruits, flowers and small saplings, they like fresh green leaves, of course, when the food is scarce, the fallen leaves are also okay to eat. Red crabs are not absolute vegetarians, they also eat other dead crabs and dead birds, and if given the chance, they also eat the garbage left behind by large African snails and humans.

Cars speeding on the road and hot weather pose a threat to migrating red crabs. In addition, there is an invasive alien creature on the island, the yellow ant, which is the main killer of red crabs. Researchers at Christmas Island National Park have found that some of the woods used to be a route for red crabs to the sea, but now there is no sign of them.

Researchers believe that although the yellow ants do not have stings or very hard pincers, they have a toxic and corrosive storage of formic acid, which sprays acid outward through a reorientable nozzle in the abdomen, and it is a collective spray, which is difficult for intruders to guard against. Red crabs, though their hard shells, are defenseless against the tide of ants, especially when they pass through yellow ant nests on their way to migration. The researchers also found that many red crabs were blinded by the formic acid of yellow ants, so their movements were immediately slowed down.

The eyes and mouth of these red crabs killed by the ants are black. The researchers theorized that the ants may have started attacking from the softer parts of the red crab, such as the mouth and eyes. The growth of crab eggs in the sea is also full of ups and downs.

After several molts, the algae-like larvae go through the "big-eyed larvae" stage and finally become juveniles. They are somewhat similar to small shrimp and generally attach themselves to marine plants such as algae and live a planktonic life. Generally speaking, red crab eggs can become juvenile crabs in about a week, and they can be landed in about a month.

Strangely, it is not every year that juvenile crabs land. In recent years, researchers have discovered that in the biological chain of this area, there is a species of whale shark known as whale shark, which feeds on crab eggs when they become krill-sized crab seedlings, and can eat tens of thousands of small red crabs at a time.