all fishermen and fish cooks familiar perch.But we know that this representative is not only sea, but also the river.Between these two types, there are significant differences as a flavoring and external.
perch
This is a beautiful representative of the external indicators, and most of his color has a greenish-yellow hue.They are also decorated with clear transverse bands.Their belly is always light.It has a tough, big, sharp fins.The tail at the bottom of a dark color, and the lateral edge of the scarlet color is different.Body laterally compressed perch.The head turns into a hump.Also, it is distinguished by small eyes.
This fish has no subspecies, like other families.Of course, there are perches, differ in coloring, size or other characteristics.But such differences are likely to reflect the ecological status of water bodies and their diet.But in any case it is an ordinary river perch.What caught no fish to the hook, perch can not be confused with other species or families.It can grow up to half a meter while weighing 4.8 pounds.It lives up to 17 years.But often in the mass catch fish does not reach this size and on average is approximately 15-30 cm. This is the age of four-year individuals.This type of fish inhabit the waters of most of Eurasia.
life and development of the river dweller
This lake-river species is predatory.He lives in the coastal areas in underwater thickets.In these places it is easier to provide food - zooplankton and small fish juveniles.But depending on the reservoir, which resides grouper fish, its diet can differ.The larger the pond, the richer the food base and the "menu" of the fish becomes more diverse.In these cases, it begins to divide into three or two "races" that are different between the speed of development, habitat and food composition.Near the coast of perch is growing slowly, because his diet is mostly vegetarian foods and invertebrates.If perch inhabit the depths, its growth is fast, it mainly feeds on the young of other fish.Therefore, even living in the same lake, the timing of puberty in these inhabitants are different.
Spawning usually perch freshwater fish becomes sexually mature at two or three years old.The length of the fish at this point may be very different.Spawning always begins in spring after ice.In the southern parts of this period falls in February and March in the northern regions in May and June.The female lays eggs on the plant last year.The number of eggs varies greatly and is calculated in thousands of 12 to 300. perch good survival of eggs and larvae.Before the caviar will larva, passes two weeks.As soon as kids start to hunt plankton.Freshwater fish grouper (photo suggested above) spawn only once a year.
Marine representative
river and sea bass are very different fish.By outward appearances may be found similarity of the two representatives of the submarine, but the internal structure and other features it becomes clear that these two kinds of completely different teams.Marine fish grouper (photo below) can have large eyes and bright red color.Usually, it is inherent in deep-sea species.Such external data helps the fish dwell in constant twilight.Perch, which are kept close to the shore, the eye is not so much the size and coloring darker.Often they have a cross pattern, but with age, it can become less noticeable.
The family of groupers, there are about 90 species.Size they are also very different.For example, only very small rises to 20 centimeters, while the largest species in the amount of up to a meter.These inhabitants can live up to 15 years.It is also worth knowing that the fish grouper is the second name "smarida."
Habitats
Most members of this family lives in the North Pacific temperate waters.Four types of redfish are found in the Atlantic Ocean.There are also representatives of the Barents Sea, the Black Sea, the Norwegian.These fish make migration.Depth data depends on the type and area of ​​residence.For example, individuals from the Barents Sea are kept at 150-300 meters, and in the Black Sea dropped by only 5-30 meters.
Lifestyle
redfish keep flocks.The diet of individuals who have not reached 30 cm, up shellfish, eggs other relatives, small fish, underwater vegetation and various crustaceans.Marine fish perch, which is held closer to shore, usually lives in the bush and does not make specific migrations.They occupy a small section.In order to hunt, these groupers are hiding in ambush, and suddenly snapped to float next to the victim.Fish are kept deeper, are more active, and usually they can meet away from the coast.Thus the fish does not depend on the bottom.Larger individuals feed on fish - herring, capelin, juvenile cod, and other kashpakom.
Reproduction redfish
All kinds of this family are viviparous.Once the females are fertilized, they are moving away from the male and get in packs in locations where it will be shedding larvae.Spawning perch happens every year.The number of litters much more than other livebearers, and at times can have up to two million larvae formed.Number of offspring depends on the size of the fish.Perch larvae begins to throw in the spring.Was born juveniles had an average size of from 5.2 to 8 mm.Since throwing takes place in the warm arms, the larvae fall into the stream and carried away to the north.So they are in the central areas and keep away from the shore.All summer they are in the upper layer of water.At this time, the adults go to the east.
commercial value
grouper fish is particularly appreciated in the fishing sector.Its production occurs trawl method.The meat of this species are very tasty and suitable for sale in smoked, frozen, salted and fresh.It is known that the cutting of the fish should be extremely cautious, especially if the process is carried out on the vessel.Spines, which are available for this species, can be dangerous.This injury often leads to complications that are going on for several weeks, and sometimes months.Sometimes this damage can leave a mark for life, for example, the finger stop functioning.
