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Kurkunpään syöpä
 Crayfish or broad-clawed crayfishThe largest of the crayfish found in Latvia. Males are 14-20 cm long, females - 10-16 cm long. The thorax is covered by a single, greenish-brown shell or pectoral. Abdomen long. The claws are massive, the edge of the immovable finger is toothed. Like other crayfish found in Latvia, they regularly change their shell as they grow: in the first year - up to 8 times, starting from the third-fourth year of life - 2 times. A new shell is formed in about a week and a half, so after shedding the old she |  DescriptionCancer body and needle grooves smooth. Maximum length 14.5 cm. Fertility is reached at a length of 7-8 cm (males in the 3rd year, females in the 4th year). Mating and egg fertilization takes place at the end of October (water temperature 13 0C). Number of eggs 100-200. Omnivorous; feeds on plants, fallen or seriously injured animals lying on the bed, also on molluscs, aquatic insects and their larvae. The river crayfish is listed in category 3 (rare species) of the Latvian Red Book. |  Storage1. It is best to store crayfish in the water body where you got them. Prepared boxes can be used. 2. Can be stored in a room where the temperature is from +3C to +8C, such a temperature is in basements. Crayfish are placed in boxes on the condition that you sprinkle them with water from time to time. The crab should always be moist. 3. Store in pools or large bathtubs. The water temperature must be cold so that the crayfish do not begin to change their shell. About +6C to +16C. The water must |  DescriptionInhabits various bodies of water: streams, rivers, lakes with clean water and a sandy or sandy-muddy bed. Habitats where natural hiding places are mostly found are particularly favorable: ridges, caves and depressions on the shore below the constant water level, stump-like overhangs with a washed-out foundation. Cancers are often found under the roots of black alder trees growing on the shore and entering the water. Lives almost exclusively in fresh water, rarely in slightly brackish water. Acti |  Sick cancerIf the cancer has inadequate living conditions in the water body. Contaminated water, inferior food, then black dots appear on the cancer body. Such crayfish cannot be used for further cultivation. So one cancer can bring disease to all others, be careful. Look at the small dot under the letter p on the head. |
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 Dirty frontSuch a Cancer front means that he hasn't changed the dude yet. Such crayfish can often be found in muddy and sun-darkened rivers. The water temperature has not yet warmed up and the crayfish are not changing their shells. |  Catching crayfishIt is important to know the crayfish fishing rules for a specific water body where you will catch crayfish. Important! Use fresh fish, meat as bait. Fresh not spoiled remember that. 1. Picking by hand. 2. Chalks. 3. Cancer killers. |  Female CancerFemale after spawning. The white spot is the attached sperm, the black spot in the tail is the place where the eggs were attached. When the female changes her shell, her front will remain clean. |  Hand picking1. Picking by hand. Prepare tree branches, sharpen their ends. Pierce the tree through the bait. Poke the trees with the bait in the water along the shore at a depth that you can reach with your hand. Every 2 m. When you are done, wait 30 min and go check. There will be crayfish around your bait that you have to carefully pick off one by one. This happens at night, you need to use a night light. Crayfish start feeding when the sun goes down. 2. Catching crayfish from caves. There are caves along |  Cancer with a crayonYou put the bait inside the net, fasten it with a clip or wire so that the crayfish cannot drag the meat away. You drop the crayon into the water every 2-3 m. After 30 min go check. Drag the crayon up behind the float and select the crayfish caught in it. It happens at night when the sun has set. |
 Catching with murderThe most convenient way of catching. The advantage is that you put them in overnight and check them in the morning. Place the bait inside the hole. Drive the boat to the places of your choice, place the traps in water depths of 1-6 m. In the morning, when the sun has not yet set, go to check. Crayfish will try to get out of the hole, so check as soon as possible. |  TransportationPlace crayfish in boxes, can be covered with freshly picked nettles. Nettles provide cold temperatures. Moisten if necessary. Crayfish should be in a humid environment and in the coldest air temperature possible. It is better to use the air conditioner in the car during the summer, for short distances it is enough to open the window of the driving car to change the air. The main condition is that the crayfish should be covered with nettles in the shade, there should be some humidity, fresh air i |
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