Cancer | Facts & Information
# Cancer | Facts & Information
Cancer | Discover Fascinating Facts and Information About Cancer
European crayfish, Noble crayfish and big-fingered crayfish are the most common species in Europe and a living food.
Species of crayfish:
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CancerThe Raccoon, also known as Procyon lotor, is a fascinating animal that belongs to the Procyonidae family and is considered a small and intelligent mammal. With a distinctive appearance and characteristic behavior, this animal represents an emblematic species of wetland areas in North America. In this article, we will explore in more detail about raccoons, their characteristics, the habitat in which they live, their diet, and other interesting aspects about these fascinating inhabitants of nature.
Raccoons are well adapted to life in wetland areas. These mammals have a muscular and strong body, with an average length of about 50-70 centimeters and weighing between 3 and 9 kilograms. Their distinctive physical features include a black mask around their eyes and a thick, bushy tail with alternating black and white rings. Their fur is usually grayish-brown or reddish and is very dense and fluffy.
The preferred habitat of raccoons is represented by wetland areas such as marshes, rivers, lakes, and floodplain forests. These areas provide the necessary food and shelter for these animals, as raccoons are known to be omnivores and highly adaptable. They feed on a variety of food, including fish, amphibians, aquatic invertebrates, fruits, seeds, aquatic plants, and even human waste. Thus, raccoons play an important role in maintaining the ecological balance of freshwater ecosystems.
One interesting aspect of raccoons is how they clean their food. Using their agile hands and sensitive fingers, raccoons perform a routine known as "food washing." During this process, they dunk their food in water and move it in a specific way to remove sand, dirt, or other impurities. This ability highlights the intelligence and adaptability of these mammals.
When it comes to reproduction, raccoons exhibit interesting behavior. Traditionally, the female builds a nest in a suitable location, such as a fallen tree or an abandoned burrow. The birth of the offspring usually occurs in early spring or summer, and a female can have anywhere from 2 to 7 cubs in a litter. Raccoon cubs are small and completely undeveloped at birth, relying on their mother for food and protection. Eventually, the cubs grow and learn the necessary skills to survive in the wild.
However, there are also some aspects of raccoons that create conflicts in their interaction with humans. Sometimes, raccoons can enter inhabited areas and cause damage to agricultural crops or search for food in human garbage. Additionally, raccoons can transmit diseases and parasites to humans and domestic animals, increasing the risk of infections. Therefore, education and awareness of the population are important to find coexistent solutions to avoid such problems.
In conclusion, raccoons are an interesting and adaptable animal that has evolved to survive in the wetland areas of North America. With their characteristic appearance and specific behavior, these fascinating mammals have a significant impact on freshwater ecosystems and have major ecological importance. However, interactions with humans can also create conflicts, requiring the finding of sustainable solutions to encourage peaceful coexistence between these two species.
Like other species, these crayfish live only in freshwater rivers and lakes.
They can be found in France, all of Central Europe, the Balkan peninsula, the British Isles, Scandinavia and the western Soviet Union.
Crayfish are omnivorous like shrimp and lobsters. That means they eat almost anything.
Cancer feeds on mollusks, aquatic insects, plants and worms, etc.
Grab the food with tongs. The amount of food consumed depends on how often they shed. When they shed they eat their carcass to give them calcium.
The body of cancer consists of cephalothorax and abdomen. At the level of the cephalothorax there are 2 pairs of antennae , with the help of which the cancer senses smell and touches, 2 compound eyes, consisting of hundreds of visual cells. The eyes are located at the top of extensions, which move in all directions.
The mouth is provided with powerful jaws. On the dorsal side of the cephalothorax,5 pairs of articulated legs are caught : the first pair ends with large and powerful pliers, serving to catch food, pairs 2 and 3 have small pliers, and the last 2 pairs end with claws.
The five pairs of legs are clamped by the cephalothorax, the first three pairs ending with pincers; the one on the first pair is the strongest. The abdomen of the crayfish is made up of 7 segments.
The first 5 gates on the ventral side, one pair of legs each. Segment 6 shows laterally, two wide pieces that, together with Segment 7, form the code swimmer. Cancer walks forward on the bottom of the water, using its feet.
When in distress, it pushes the water forward, aided by the paddles of the code swimmer, and suddenly moves the abdomen towards the forelimb.
Thus, he swims back. Cancer breathes through the gills. They are located at the base of the legs and are wedge-shaped. The gills are permanently bathed by a stream of water, which circulates from the back forward, ensuring gas exchange at their level.
Procambarus sp. marble
Crayfish hide Cube stones or logs. they are more active EMF at night.
Adult crayfish (older than one year) are much more active than kept crayfish.
They usually move slowly and cautiously, but if frightened they swim back quickly waving their tail to escape danger.
The wild predators of crayfish are alligators, turtles, otters, some birds, etc.
Like most animals, crayfish are either male or female, but in most cases they are males.
In the process of mating males put sperm, which is shaped like a small ball of wool, in the lower part of the female's abdomen. It curls its tail and after passing the eggs through the sperm keeps them stuck to the tail for four weeks.
Crayfish that live in areas with colder waters this period increases. For the reason ascesta and others there are variations regarding the gestation period.
Reproduction generally takes place in the spring. Tropical crayfish breed all year round because the temperature of the environment is much more stable.
Unlike saltwater crayfish freshwater crayfish have larger eggs. They become adults after 3-4 years.
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