Shrimps are crustaceanswhich are representatives of the detachment of the ten-felt cancers. They are widespread throughout the water reservoirs of the World Ocean. The length of the adult shrimp does not exceed 30 centimeters when weighing 20 grams.
Science is known more than 2,000 individuals inhabiting, including in fresh waters. The taste qualities of shrimps led to the fact that they became an object of industrial mining. Today, the practice of shrimp cultivation practice is distributed.
Features and habitat shrimp
Shrimps - unique animals on the body. Features of shrimp Enclosed in their anatomy. Shrimps are one of the rare crustaceans, dropping and changing the shell.
Her genitals and heart are located in the head. There are also digestive and urinary bodies. Like most cruise, shrimp breathes with the help of the gills.
Shrimp gills are protected with shells and are located next to the feet. In normal condition, their blood has a light blue color, with a lack of oxygen it is discolored.
Shrimp dull Almost in all major reservoirs of the world. Their area is limited only by the harsh Arctic and Antarctic waters. They adapted to life in warm and cold, salted and fresh water. The greatest number of shrimp species is concentrated in equatorial areas. The farther from the equator, the smaller their population.
Character and lifestyle shrimp
Shrimp Play an important role in the ecosystem of the seas and oceans. They purify the bottom of the reservoirs from the remains of tubes, water insects and fish. Their diet consists of rotting plants and the detritoon yla, which is generated as a result of the decomposition of fish and algae.
They lead an active lifestyle: furrows the bottoms of the bottom in search of food are crawling around the leaves of plants, cleaning them from snail leeches. Maneuverability in the water in shrimps provide the walking legs on the purels and abdominal float legs, and the movements of the tail skeins allow you to quickly bounce back and scare your enemies.
Aquarium shrimps Perform Sanitar functions. They are eliminated by reservoir from the backyard lower algae and feed on the remains of the dead "fellow". Sometimes they can attack patients or sleeping fish. Cannibalism among these crustaceans is a rare phenomenon. Usually it is manifested only in stressful situations or under long hunger.
Types of shrimp
All famous sciences of shrimp are divided into four groups:
- Heat-water;
- Cold-water;
- Solonodic;
- Freshwater.
The habitat of heat-water shrimp is limited to the southern seas and oceans. They are caught not only in natural environment Habitat, but also cultivated in artificial conditions. Science is known more than a hundred types of heat-water shrimp. Examples of such mollusks are black tiger and white tiger shrimp.
On photo White Tiger Shrimp
Cold shrimps are the most common from well-known subspecies. Their habitat is wide: they are found in the Baltic, Barents, North seas, off the coast of Greenland and Canada.
For description of shrimp Such individuals are worth mentioning that their length is 10-12 cm, and the weight is 5.5-12 gr. Cold shrimps are not amenable to artificial reproduction and develop only in a natural habitat.
They feed on an exceptionally environmentally friendly plankton, which positively affects their quality. The most famous representatives of this subspecies are the northern red shrimp, North Chile and the Red Great Shrimp.
In the photo shrimp chilim
Shrimps, common in the salty waters of the seas and oceans, are called solonovodas. So, in the Atlantic Ocean inhabit red royal shrimps, Northern White, Southern Pink, Northern Pink, Pilly and Other Individuals.
In the photo Pilly Shrimps
On the South American coasts you can meet Chilean shrimps. The water of the Black, Baltic and Mediterranean seas is rich in grassy and sandy shrimp.
On the photo grassy shrimp
Freshwater shrimps are predominantly inhabited in the countries of Southeast and South Asia, Australia, Russia and countries post-Soviet space. The length of such individuals is 10-15 centimeters with weight from 11 to 18 grams. The most famous species are troglocar shrimp, Palaemon Superbus, Macrobachium Rosenbergii.
Nutrition shrimp
Foundation food shrimp Demunning aquatic plants and organic residues. In the natural habitat, they are padelvers. Shrimps will not refuse the pleasure to enjoy the remains of the dead or even young fish.
Among the plants, they prefer to eat such, whose fleshy and juicy leaves, for example, ceratopteris. In the process of searching for meat, shrimps use organs of touch and smell. Turning your antennas in different directions, she will look around the terrain and tries to find prey.
Looking for vegetation separate species Shrimps, dwelling closer to the equator, roll the soil of reservoir. They run on its perimeter until they go to the food, and then, approaching it at a distance of a centimeter, sharply thrown on it. Blind individuals living on the day of the Black Sea are fed by sludge, sheltering it with rhives - perfectly developed jaws.
For the shrimp-grown in the aquarium, specially designed feed for nutrients enriched with nutrients and iodine are produced. It is not recommended to feed them in perishable vegetables.
As a meal, you can use a delicious carrot, cucumber, zucchini, dandelion leaves, clover, cherry, chestnut, walnut. The real feast for shrimp is the remains of aquarium or fellow.
Reproduction and lifespan of shrimp
During puberty, the shrimp female begins the process of forming eggs that resemble a green-yellow mass. When the female is ready for mating, it highlights pheromones in water - substances having a specific smell.
After taking this smell, the males are activated in search of a partner and fertilize it. This process takes no more than a minute. Then the shrimp appears caviar. The norm for the adult female is the masonry in 20-30 eggs. Embryonic development of larvae lasts from 10 to 30 days depending on temperature ambient.
In the process of embryonicogenesis, the larvae takes 9-12 stages. At this time, changes occur in their structure: at the beginning it is formed with a cold, a little later - headband. Most hatched larvae dies due to adverse conditions or "work" of predators. As a rule, maturity reaches 5-10% brood. For breeding shrimp The aquarium removes up to 30% of the offspring.
The larvae lead a sedentary lifestyle and are not able to produce food, feeding in the feeding feed. The last stage of development in these clams is called decapoditis. During this period, the larva leads a lifestyle with nothing different from adult shrimp. Average, life cycle Shrimp lasts from 1.5 to 6 years.
Shrimp called animal crustacean animal. At the moment it is a sought-after product. Industrial calf allows you to receive an income to many firms that are engaged in this work. The demand for the product is associated with excellent digestibility and the presence of many vitamins and trace elements in it. And thanks to developed technologies and infrastructure, the buyer receives goods high Quality. More about catching shrimp told in the article.
Benefit
There is a lot of protein in the meat of animals, which is perfectly absorbed and contains many essential amino acids. The latter cannot be produced in the body, they only come with food. This product contains a lot more iodine than beef, so it is in demand in regions with iodine deficiency.
A rich set of mineral elements and vitamins affects almost all organs and systems, including skin, hair, nails. This is an indispensable means for the prevention of heart disease and vessels.
Habitat
Where do shrimps catch? There are several habitats of these creatures:
- Tiger view is in Pacific Ocean. Closer to the equator, animals are larger and tastier. In warm waters occurs big variety species. Closer to the poles less.
- These animals are found in Kenya, Brazil, Ecuador, Somalia. In these countries, water usually has a temperature from +25 to +30 degrees, which is favorable for the development of these inhabitants. Their dimensions can be 30 cm. On the territory South America It happens on farms, thanks to which a quality product is produced.
- Reducing the temperature to +15 degrees becomes the cause of death marine inhabitants. Similarly, warm water is both - +35.
- In the Barents, Baltic, the northern seas inhabit the small 2.5-10 cm. Great value has animals caught by Canada and Greenland.
- Many marine inhabitants in the Mediterranean, Black, Azov Sea.
- Freshwater animals are in Amur and cave water bodies of Transcaucasia.
- There are crustaceans in fresh waters Far East. The population is a relic, since I lost contact with the rest of these species due to the geological changes of sushi. They live at +15 degrees, but when the temperature drops to 10 degrees, the death of larvae is observed. Adults cannot carry down to 0 degrees.
If animals live at temperatures that differ from optimal, they grow slower, and also cease to multiply. In such a climate, they exist up to 3 months. Shrimps are not very sensitive to salted water, since even those that live in fresh water have maritime origins.
Industrial types
Although there are several thousand racks in nature, there is no commercial interest to all of them. In Russia, the most popular is the beer shrimp - cold-blooded red. It is small in size, sweet taste. She has subspecies - red comb and northern Chile. Game and royal shrimps are in demand.
The coast of Africa has a southern pink shrimp. Captain is in the artificial reservoirs of China and Korea. In the black and Mediterranean seas there is a sand shrimp, whose fishery performs Germany. Fuck grassy black Sea Shrimp. The US restaurants serve spotted deepwater inhabitants, as well as white and pink. There is a Chilean view common on the Chile coast.
Where and when to catch?
When can you catch a shrimp? To be a rich catch, the shrimps need to be sent at night or in the evening. Many are recommended to go fishing in the early morning, but it should be before dawn. The place must be chosen by the type of shutters or where there is an intense narrowing of the bed. The catch can be in a duct that connects the sea and Liman.
The inhabitants are bought near the walls and supports of the pier, concrete structures, breakwaters, rocks, boards of the ship. Also there are many in thickets of algae. A bright lamp can be bait. In the dark period, they light the water. Especially for this, lights are sold with a hermetic case. Such products are suitable for use under water. Hacks quickly run into the light. How to catch shrimps? This uses several proven methods.
If catching trawl is chosen, then chicken loss, fish, meat will be required. On this issue, the opinions of fishermen are different. Some believe that the bait should be somewhat prituchish, while others say about the need to use fresh bait. Another subtlety is different. If you know about the time of their offensive, it will be possible to improve the result of fishing. How to catch a shrimp in Primorye? All proven methods are applied for this. Consider them in detail.
Saccha
How to catch shrimps? By law, it is allowed to use a tap having a diameter of up to 70 cm. You need to choose a device with a long and strong handle. During highlighting the lantern, they are watering about the walls, supports, structures, near algae and ships.
In this way, the catch will not be big, but if the goods are not for sale, it will be enough. Together with shrimps in a sump penetrate, algae, sand. If there is a boat, then catching it from it. All rules are the same, you only need to take a suitable sacc. How to catch shrimp B is suitable any of the ways specified in the article.
Running
In another way how to catch shrimp? The trawl is called the device for catching not only crustacean inhabitants, but also fish. It is a metal circle or oval, to which a finelyeted grid is connected, similar to the bag. Its length can be 4 meters.
After immersing the water, the trawl need to pull along the bottom, overgrown with algae. To do this, ropes are fixed to the metal frame. Often, trawl is tied to the boat. It is possible to install in a place where the shrimp dwells, only in advance it is necessary to place the bait. Helps accommodation to the device in the area of \u200b\u200bnarrow ducts. Then you just need to control the current and to turn it in a timely manner.
Net
It is usually used for fishing from a boat. How to catch shrimp net? It is lowered on the bottom of the ship, and pull out for a special rope. While choosing a place of fishing should be considered that the depth should not be higher than the radius of the network.
There are other methods of catching racks. For example, you need to connect the reeds in the mid-size bundle, put inside the bait and immerse it on the bottom. After some time, you need to pull the trap with the contents. But this option is poaching, so there is a possibility of the appearance of trouble. How to catch azov shrimp? Hunting for marine inhabitants is carried out by any of the 3 ways specified here.
Do you need to take into account seasons?
It is important to take into account not only how to catch shrimps at sea, but also periods of fishing:
- In the summer of animals, spawning time. Fishing during this period is prohibited, and for poaching the law is punished.
- The mass turn usually occurs in the spring and autumn when the water is warm. Therefore, hunting for marine inhabitants in May, September, October will bring great results.
- In winter, the wraps are cautious to a depth of 30 meters, so even if you use a cincure or not effectively.
Deep-water method fishing
The deep method of fishing is considered a complex process that can be used in the industrial sphere. Called rahes are subjected to heat treatment on the vessel, which increases their quality. Usually for industrial fishing use trains of large sizes. They are allowed on the bottom, which allows you to collect everything in your way.
This method allows you to catch shrimps, fish, mollusks and other inhabitants. The trawl is able to plow the seabed, destroying everything around. On the deck he raised winch. When mining is sorted, freezing products and delivery to the mainland.
Saving shrimp
Since these marine inhabitants quickly deteriorate (approximately 2-3 hours), it is necessary to maintain them correctly after catching. Fishing-lovers put shrimps into an ice container. If the production is industrial, then seafood frozen on the ship. You can save the product and so: put in a cropped bottle by filling it with water, and then it is necessary to put it in the freezer.
Thus, catching shrimp has its own characteristics. You need to know where, when and how it can be done. Also need to remember the safety of the product. In this case, the hunting for marine inhabitants will bring excellent results.
The Black Sea Shrimp according to the classification refers to crustaceans living in the Black, Azov pool and Mediterranean Seas. It is not only food for fish and other inhabitants of water bodies. Many centuries in a row this delicious delicacy prefers gourmets and fans of seafood, so its production acquires an industrial scale.
Shrimps (lat. Caridea) refer to arthropods from the detachment of the children of the Crangonidae family. They can safely live both in fresh and sea water, thanks to which they are widespread in all reservoirs of the world. The depth of their habitat can reach up to 80 m than they enjoy in order to hide from enemies. Also, they know how to quickly be buried in the or sandy bottom when meeting with the predator.
It consists of 3 departments: pumped, abdominal and tail. Almost all body is covered with a shell consisting of chitin and other minerals. The tail plates are divided into segments, at the end of the body they form the tail fan, which helps to swim and move.
In the front there is a mustache-antennas that are organs of touch and smell. Under them are antennas intended for identification chemical composition Water and food.
In crustaceans there are 5 pairs of legs: the first 3 are designed for self-defense and seizure of food, the following 5 - to move. The remaining 2 legs are located under the abdomen and can be used both for swimming and hacking eggs with females. In males, the first pair in the process of evolution turned into an organ for copulation.
The life expectancy of shrimp is 3-5 years. The main diet consists of plankton, algae residues. Large specimens of crustaceans eat larvae and worms, small invertebrates and dead fish.
Upon reaching the sizes of size 3-4 cm, they are ready to reproduce and can postpone eggs. In a few days, small plankton larvae hatching out of the masonry. During the ripening, they change the shell several times, each subsequent slightly more and stronger than the previous one. And only passing 5 lines they reach the stage of the post-larvae and can go to the bottom lifestyle.
Varieties
In the Black Sea, there are several types of crustaceans, of which 2 belong to the shrimp of the Palaemon genus having a commercial value and are eaten.
These include:
- black Sea Herbal (Palaemon Adspersus);
- chernomorskaya Stone (Palaemon Elegans).
Plenmon Slender or Stone, which was called on the necessary habitat. These creatures prefer to live among the clusters of stones in the ridges, gorges and shallow water, covered with dense thickets of algae. In secluded places, such inhabitants live calmly, because They are well protected from enemies. It is possible to find a lot of small plankton, which is the main food for them.
Stone shrimps can safely live and multiply with any salinity of water, so they are found in a more freshly Azov Sea. The size of an adult individual can reach 8 cm with a mass of up to 8 g.
Herbal dememon chose the habitat of overgrown with algae bottom sections and sandy beaches near Anapa. The shell color has light shades, the Taurus is almost transparent, which allows it to live safely on the shallows. The size of such crustaceans is up to 7 cm.
Azov shrimps living in the waters of the Kerch Bay and the Sea of \u200b\u200bAzov are mainly herbal, preferring areas that strongly overgrown with water vegetation.
How to catch shrimps?
Crustaceans belong to valuable, nutritious and tasty seafood. They include many vitamins, acids and minerals (calcium, magnesium, sodium, iron, iodine, etc.). The useful substances contained in them allow to stabilize hormonal background In the human body and increase his immunity. The disadvantage of shrimp meat is the large content of cholesterol.
For their taste, they are valued among gourmets and fisheries lovers. Therefore, cavity cavity is carried out both on an industrial scale and fishery lovers. The latter prefer them not only to eat, but sell in local cafes and restaurants.
Shrimp fish most often spend in the evening or at night. It is best for this to choose plots in the form of shutters, because In places narrowing the reservoir, it is convenient to install trawls or traps. Called crustaceans can be consumed not only for use in food, but to use as their bait or as cauting during fishing.
Many fishermen train not only in the coastal zone, but also from the boat. And the most ancient way of shrimp fishing was popular in Belgium and was carried out with the help of specially trained horses, which were dragged by a shrimp network.
Habitat
To catch crustaceans in large quantitiesIt is necessary to know exactly the places where shrimps live. Favorite areas for them are the bottom layers at a depth of 0.6 to 1.5 m, where there are clusters of seaweed. If there are fed and tides in the selected place, then the exact time of their offensive should be known, because Mounting hours are considered the most comfortable for fishing.
Equipment and methods of fishing
The basic tools of labor and methods of shrimp:
- Skaching for shrimp (Other names - Podsak or Drake), consisting of a metal circle of large diameter (at least 70 cm) or a rectangle (aluminum, etc.), on which a bag of length up to 3-4 m from a fine mesh, and a long durable Handles. On the bottom of the mesh, the cargo is fastened, and on the sides - sticks, with which you can pull the cuckoo along the bottom, going into the water.
- The trawles make 2 species (multiple and bottom), ropes in the amount of 4 pieces are tied to them, intended for pulling so that all the adaptation stretch along the bottom of the reservoir. At the same time, the fisherman stands on the belt in the water and drags trawl against the current.
- The lantern during catching a saccmir or trawl is a bait to attract the attention of water inhabitants, as well as additional backlight.
Homemade traps are widespread for love shrimps. For the manufacture of shrimp, the following materials will be needed:
- kapron mesh with cell 14 - a piece of 1.5 × 1.5 m;
- galvanized rigid wire - 3-4 m;
- thin wire in plastic braid - 0.6 m;
- 4 m of Kapron thread (twine);
- float (plastic bottle, etc.) and rope.
First, a piece of mesh is taken and stitched in the form of a large pipe. Another piece of 15 × 30 cm in size is similar to the length to enter the trap. Through it is passed through a piece of thin wire to create an entry in the form of a ring. Wire edges should be twisted and fix.
Then a galvanized wire felt in the cells in the form of a spiral, which will hold the trap rings. After 2-3 turns inside and 1 outside the ends, it must be fixed at the first and last rings. Then the circle is obtained, then both edges of the large pipe must be sewed to the wire rings using the twine.
In the final between medium rings should be tied with a rope bait. The float is also attached to the middle of the shrimp. As bait, Black Sea fishermen often use slightly fierce meat.
The simplest trap for shrimp is made from plastic bottle (float), cargo and plants called "rolling the field" or broom. Several bushes need to be tied up, to bind the sinor, from above - the float. The trap should be omitted to a depth of 1 m at night. On wet plants massively slate shrimps. In the morning it remains only to shaken them into the substituted bucket. However, such a grandfather is considered poaching and can be imposed by a fine.
Natural enemies in nature
In conditions wildlife Most young shrimps die still in the stage of larvae, because They are tasty and useful food for many underwater inhabitants. They eaten the bottom types of fish, seabirds and even some mammals. Before the adult, it lives a very small amount.
Restrictions and bans on catching shrimp
In accordance with the order of the Ministry of Agriculture, a ban on catching shrimps for the entire summer period is imposed annually. From June 1 to August 31, 1 person is allowed to catch no more than 5 kg of crustaceans. Fish security officers daily carry out raids on the banks of the Crimea in order to prevent shrimp fishing.
However, from September 1, the season resumes. The condition of shrimps in the Azov and the Black Sea, according to the conclusion of specialists, is prosperous. Their amount is growing steadily, which is of interest to official fishery and contributes to a rich catch.
Since 2016, catching these crustaceans is carried out by the mining organizations of the Krasnodar Territory and the Crimea. Called catch is supplied to restaurants and other food institutions. The internal market for shrimp is in high demand, due to its rapid reproduction. According to statistical data, the annual shrimp catch in black and Azov seas is more than 1.5 tons.
Fresh shrimp should be properly frozen. Coloring should be smooth, ice glaze - fine, and the tail is pressed against the abdomen. White spots on the shell or snow flakes in the package mean that shrimps were repeatedly defined. Pay attention to the head of shrimp if it is. Brown head happens in pregnant shrimp, their meat is the most delicious and useful. Green head indicates that the shrimp was fed by algae and a special type of plankton. But the black head speaks of serious illness, there is such a shrimp dangerous for health. Black spots on the shell also are also invalid.
What shrimps most often get to Russia?
According to data, the northern red shrimps will be taken to Russia, then the North Chile and the Red Great Shrimp are followed.
By the way, the red they are in the raw form. They boil these shrimps alive in sea water and after cooking immediately frozen. It is possible to distinguish the boiled shrimp from the raw on the tail: it is twisted with boiled, and the raw tail is straight. The market research has shown that northern shrimp is supplied to Russia only with rosable, and such a straight tail - a sign that the shrimp was already welded.
Analysis of the market of frozen shrimp in Russia stressed such a moment: Russian fishermen of shrimp catch, but send them to the USA, South Korea and Japan, and Russia purchases shrimp caught by the Danes and Canadians. Justified by this economic benefits.
Another nuance touches the size or "caliber" shrimp. On the package you can meet such numbers - 50/70 (pieces per kilogram), or 70/90 and 90/120, the greater the number, the smaller the shrimp. So, the cold-water shrimps are small, and the size of 70/90 is rare for them. It is better to buy prawns caliber 90/120, on all other more icethan meat.
Small shrimps - Does not mean bad
What the shrimp is smaller, the same more juicy meat and brighter taste. Shrimp market review should also be taken into account: cold-bloodeds are caught in a natural habitat, and heat-water on an industrial scale are grown on farms.
Interesting fact. So-called "royal" shrimp in nature does not exist. Under this title, all large heat-water shrimps are combined, except for the tiger, called so because of the specific color of the shell.
IN different countries Royal Shrimps their own - there are white Pacific, Indian, Chinese, Japanese sweet shrimps, Atlantic red and even gigantic freshwater shrimps living in south-East Asia. But in the natural habitat, only 20% of the total royal shrimp is caught. The remaining 80% falls on the share of farms, where shrimps are bred in special ponds.
Where are the "royal shrimp" in Russia imported?
As the study of frozen shrimp market showed, large shrimp is carried from China, India and Bangladesh. Farm shrimps are always larger than wild, and on the packaging of the manufacturer should be indicated that this is a product of aquaculture. Sell \u200b\u200broyal shrimp boiled in three types - unrequited, with a shelter without a head or completely purified. By the way, despite the impressive dimensions - 25-30 cm in length, meat in royal Shrimp Only 30% of the total weight, the rest is the head.
Tiger shrimps - where are they from?
Farm tiger shrimps are supplied to Russia. From India and China bring black tiger shrimp, and from Indonesia and Thailand - ordinary. They differ in color - in ordinary dark stripes on the light shell, and in black the opposite. The size of the tiger shrimps is even greater than that of the royal - 30-35 cm, and the meat is 50% of the total weight
Shrimp: Lifestyle
Freshwater shrimps, where they live, - an important element of the fauna of water bodies, a significant link in the food chain. They feed Many fish and waterfowl. Have freshwater shrimps and a significant economic value.
By the end of the XX century. Freshwater shrimp Exopalaemon Modestus was found in Khachagay's reservoir in Kazakhstan, and in Uzbekistan, Chirchik, Syr Darya, in Arnasai Lakes, was accustomed to the Chinese shrimp Macrobrachium Nipponense. It was accidentally delivered to fish water reservoirs together with young Far Eastern fish from China. The same shrimps hit the artificial reservoirs of coolers on hydroelectric power plants in the Moscow region, then on Ryazan GRES and began to multiply there in constantly warm water. Already specifically they were set in lake-coolers GRES in Belarus and Moldova. In such water bodies, the lower algae eat lower algae, which are developing in warm water in the mass, and they themselves are food for many fish. In particular, Sudak eagerly eaten. It is now undergoing experiments on dilution in the nutritional purposes of the Giant East Shrimp Rosenberg in the Volga Delta and in the heat-water pools in the Crimea.
As showed observations in Belarus, in the reservoirs-coolers GRES for the year the number of shrimp can grow by 8.7 times or more. In Moldova, two years after the establishment, their number has grown from 2 thousand to 600 thousand.
Freshwater shrimps are a rather valuable food product that is essential in the zone of tropics and subtropics. They are grown in ponds and on rice checks in two dozen countries of the world. In constantly warm water, shrimps can be multiplied year-round and reach a large number: up to 50 croutons in 1 m3 of water. In the USA, India, Australia, Israel in the ponds the number of shrimp can grow for the season 60 times. Mostly 10-16 species of Macrobrachium species (Macrobrachium), some representatives of which reaches a length of 30 cm and weigh 150-250 g (for example, the already mentioned giant eastern prawn Rosenbergi, Macrobrachium Rosenbergii).
Many interesting shrimp can be found when observed in the aquarium. These creatures are not bad in captivity and over the past decade have received a fairly widespread in the aquarists. They purify aquarium plants from the backwards of lower algae, perform the role of sanitation, complement the diversity of the population of the indoor reservoir, usually limited only by fish, decorate the underwater landscape with their original species. Inquariums contain Japanese swamp shrimp (Caridina Japonica), South Asian prawn bee (Caridina Serrata) and shrimps of bumblebees from the genus Neocaridina, Far Eastern freshwater shrimp. Small shrimps, for example, caridine bee, live in captivity 1-1,5, large - 2-4 years.
Shrimps are sufficient to a volume of 7-10 liters per person, they prefer a sandy bottom, clean waterFood feeds, residues of fish feed, microalgae. Large shrimps can sometimes attack patients or, less often, sleeping at the bottom at night. Healthy active fish they usually do not touch. Attacks on fish and cannibalism are more often observed in stressful situations for shrimp - after transplantation, with a lack of conventional feed, crowded, sharp changes in the conditions of content, in particular, significant temperature differences for 1-2 hours.
According to some information, the shrimps of the genus Caridina for the development of caviar and larvae need a brasswater water, and neocaridina bumblebees (neocaridina) multiply in fresh water. But the features of the biology of many species of shrimp are still not sufficiently studied, so it is interesting to recommend to schoolchildren to keep them, along with fish, in aquariums and watch them. Themes for observation may be as follows.
1. Color variability: addiction and darkening depending on the strength of lighting, time of day, soil color different species. Effect of nutrition on coloring. So, when eating red mosquito larva (moth), the body of shrimp can be reproached, when eating dark worms of the pipes - to darken, with dumping with green algae - green.
2. Personal monitoring of movements and orientation of shrimp. Walking legs on puments help them walk along the ground and climb vertically on plants. Here they are held also with the help of abdominal floors, which in other cases help shrimp to swim both forward - horizontally and up and down - vertically. The movements of the tail stems - uropodes and the flexion of the end of the abdomen help shrimp not only quickly bounce back to a considerable distance, but also to drive away from themselves other shrimps and fish. Also with harsh bends and extensions of the abdomen, jerks, a mesmering shrimp moves, the legs that have not yet hardened.
I search for food, the shrimp primarily uses the antennas, claws, weave, all the time feeling the substrate around yourself. Its eyes differ only with relatively large, close objects and are used in the surrounding space overview when swimming and motion and when observing the danger approach. This can be seen when chopped shrimp.
3. Present the interest of observing the behavior of shrimp. Large macrobrachuums and demoners exhibit elements of territoriality, hold more often in one corner of the aquarium, they try not to let there other shrimps and fish. But we did not observe the fight among the shrimps - they, exposing the revealed claws, quickly spread to the sides at the meeting. Males who compete for female behave in a similar way. Males guard females with molting and mating.
4. The experiments on feeding shrimps, the choice of food objects, on the influence of temperature on the growth and development of shrimps, the frequency of the line is noted. Shrimps quickly begin to recognize the place where feed constantly appears, and try to stay nearby all the time. So they are formed conditioned reflex At the place and time of feeding. This indicates a certain development and complexity. nervous system Shrimp: They have more plastic behavior than spider-shaped and a number of insects that almost do not form conditional reflexes.
It is worth paying attention to the structure of the discarded shells - Eczuviev. When molting in shrimps, damaged or previously lost limbs are growing, the process of their regeneration occurs. This is especially well noticeable among young, since they are more likely to die.
5. The reproduction of shrimps is a special direction of observations. Interesting features of female care for eggs, changing their color as ripening. Females can regularly postpone and non-advocated eggs, which are then gradually losing. You can trace the effect of temperature and salinity of water on the development of eggs. Finally, a complex process of the development of shrimp larvae is very interesting. If a tens of young shrimps can be raised in the aquarium - this is already a great success. Feed the larvae can be sprayed in water with particles of dry milk, yeast, boiled egg yolk, grilled grain ...