Hello dear readers. Today I would like to write about papuan zebrovogo cancer, which belongs to the family parastacidovskim cancers. Freshwater bodies of the island of Papua New Guinea are home to the habitat of zebra crayfish.
Because of its habitat, the animal received the appropriate name “Cherax Papuanus”.
Papuan crayfish has an interesting color that varies from head to tail. Telson and the back of the crayfish are colored dark chocolate, and in the eyes the color is generally almost black. At the junction of the abdomen and telson there are bright orange stripes.
Because of this color cancer can be compared with a zebra or a tiger. If poloski only cream color, the color of the abdomen will be the same.
But the lower segments of the segments bordering the abdomen are painted yellow-orange.
The joints of the walking and swimming legs are also orange, but sometimes pale blue tint can be found. Abdominal cancer legs can be either pure blue or brown.
The claws are also orange, and the fingers are white with bluish tops. In males, the first pair of pleopods is a copulative organ that participates in reproduction. In females, these pleopods are reduced.
In place of the third pair of pleopods, females have a sexual opening. The size of males of zebra crayfish does not exceed 10 centimeters, and females – no more than 8.
For a pair of papuan crayfish you will need a 60-liter aquarium, but it will arrange animals until the female begins to carry future offspring. To avoid aggressive manifestations in the aquarium and your pets feel comfortable in the can, the aquarium should have a volume of 100 liters or more. During gestation, the female zebra carcinoma becomes very nervous and can throw at anyone.
Therefore, it is better to give it enough free space.
Since sexual dimorphism in zebra crayfish is not pronounced, it is recommended to acquire up to 4 individuals in one aquarium. Do not forget to provide pets with a large number of shelters in the form of piles of stones, snags, pots and other things.
As observations have shown, this type of crayfish can get along with both aquarium shrimps (yellow pearl and red cherry) and aquarium fish. But only in the event that other inhabitants will not show aggression in relation to cancers.
Occasional intraspecific clashes may occur, but they usually occur only in the case of an overpopulated settlement.
Zebra cancer is famous for its acting talent, especially when you clean the aquarium or move your pet to a new home. His most common trick is to fall on his back and lift all his paws to the top.
If you see such a pose, then do not worry, the cat is alive and well, and in just a few minutes it will stop its circus and begin to move normally around the pond.
If the conditions of detention are optimal, then the zebra cancer does not attempt to leave the aqua and is constantly located near the bottom. However, if your aquarium is overpopulated, there are few shelters or oxygen, then pets will try in every possible way to escape from you.
The situation is the same when there are large aggressive aquarium fish, for example, tsikhlovy, in the same tank with crayfish.
The water parameters in the aquarium with crayfish should be as follows:
- temperature: 18-30 degrees, the optimum temperature is in the range of 20-25 degrees;
- active reaction environment: 6.5 – 8.3 pH;
- As observations have shown, the animal can live both in soft water and in hard water. However, the most optimal water is when chitinous cover hardens as quickly as a result of molting. That is, the rigidity should be around 30 degrees. Papuan cancer is not considered to be a picky companion when it is contained, but excessive concentrations of ammonia, nitrite and ammonium in aquarium water can be very deplorable.
As the cancer matures, it will periodically shed. The frequency of the animal and the amount of food consumed affect the frequency of the molt.
But on average, molting occurs once every three months. If the conditions of detention are suitable, then the zebra carcinoma will constantly move along the aquarium bottom and look for food.
Sometimes they have clashes, which do not end with anything serious. If one of the pets loses the match, then he quickly retreats to the nearest shelter. But if individuals of equal strength agreed in a duel, then one of them may lose a limb during a fight.
However, a new one will appear in the place of the torn claw, which after another shedding will grow by 1/3.
Often crayfish dig their holes in the aquarium soil in order to retire there. Such actions cause damage to aquarium plants, which are planted in the ground, especially the length of the ear bell (wallisneria, ambulia, hornolistnik, elodey, cabomba, lyudivigiya).
Fortunately, the damage to plants in crayfish is not intentional. Zebra cancer is considered a vegetarian. In nature, they eat leaves of beech and oak, which are the main component of the entire diet.
The fact is that such food has a good effect on the immunity of animals. You can also feed your pet with carrots, grapes, canned peas and vegetable food for aquarium fish.
To get offspring from zebra crayfish, you will need to select a couple of adult pets of the opposite sex for spawning. After the female reaches the 8 centimeter mark in length. she becomes ready to breed. Perhaps at the time of the onset of puberty, the female will have caviar, which she will fold.
During one spawning under the belly of the female, it can mature up to 50 eggs. Unfortunately, not all caviar will be fertilized, and part of it will brighten.
Dead caviar does not fall off from the pleopods and is often affected by fungi. Fortunately, it is not terrible for live caviar.
If in one aqua with crayfish you do not contain aggressive and large fish, then it is not at all necessary to deposit the female in another tank. The fact is that the females of this crayfish species do not shed all their eggs after a fright, it remains attached to the pleopods.
But by the time of the appearance of small crustaceans from the roe, the female is better, of course, removed to another container. Giving caviar takes about a month and during this time you are unlikely to notice any external changes in the eggs.
Only by the end of gestation of offspring under the belly, you will be able to see tiny eyes and other parts of the body.