SU847961A1 - Method of artificial culturing black sea flatfish kalkan - Google Patents

Description

FIELD OF THE INVENTION The invention relates to fish farming and can be used in fish farms to produce in-. conditions of the fry of the Black Sea flounder-Kalkan. There is a method of artificial breeding of the Black Sea flounder-Kalkan, which consists in incubating pelagic eggs, transplanting the larvae larvae into seawater containing antibiotics and pre-grown algae and food organisms, the density of which, respectively, is by the time the larvae are transplanted to (O, 5-b, 7) .1O ° cells per 1 ml and 3-5 ind / ml, and in feeding the larvae on days 1–11 of life, we can daily study artemni saline. Artificially fertilized eggs are incubated in water with a salinity of 16–18% and a temperature of 13–19 ° C. After hatching, the larvae are transplanted into special nursery containers with a volume of about 2 m at the rate of 5-7 larvae per 1 ml of water. In containers, the mixture of unicellular algae Dwnotie & C tertiotecta, Ptot-imonas viridis and Ctiiior-eWa concentration (O , 5О, 7) Yu cells / ml. On this mixture, rotifers Bi aclntonns p & Aoat-i & ib are grown to a concentration of 3-5eq / / ml and saline argemia nauplia up to 0.5 ind / ml. 5-8 days after hatching from the surface. the bacterial film is removed for the prevention of water in the Reagent containers and penicillin 1 is introduced daily for prophylaxis. 1 The disadvantage of this method is that it does not allow for the production of viable fry that have passed through metamor (} IU. Incubation of eggs in ordinary non-current containers leads to the creation of gas and salt regime unfavorable for caviar. In addition, the progressive growth in the nursery containers of algae and food organisms leads to a sharp deterioration in the characteristics of water that is contaminated Noah residues

pigagel environment for algae and metabolics of algae and cream srganizm "

In addition, the freshwater mode in the method is dictated by optimal conditions. Develop algae, and not larvae, which limits the ability to control the density of live food. Temperature conditions were also chosen as not optimal. Under such conditions, the growth of the larvae proceeds slowly and they, as a rule, die 25–3 days after hatching.

The purpose of the invention is to accelerate growth and obtain viable fry that have passed through metamorphosis.

The goal is achieved by the fact that after incubation, the larvae are kept for 2-3 days and the larvae are incubated and the eggs are incubated in circulating and aerated water at a temperature of 1416 C, and the transplanted larvae are transplanted from the calculation of the density of the OO-5 O ° C to 1416 ° C, and the transplantation of the larvae is transplanted based on the density of the GC-5O in the OO density of 1416 ° C, and the transplantation of the larvae is transplanted based on the density of the GC-5O in the OO-516 ° C, and the transplant of the larvae is transplanted according to the calculation of the density of the GC-5O of 1416 C, and the transplantation of the larvae of the larvae is transplanted from the calculation of the density of the GC-5O C to 1416 ° C, and the transplantation of the larvae of the larvae is transplanted from the calculation of the density of GO-5O C to 1416 C. l, while their further content in seawater is produced when the water temperature rises from 16 to:; about a weekly rate and when the surface of the water is illuminated to 200-500 lux, and on 22-25 days of life of the larvae are transplanted on the basis of the density of sediments of 0.5-1.0 ind / l of water in high-speed installations.

In addition, in the process of larvae feeding, the food organisms are concentrated in water. By creating an alternating light floor, and also by the time of transplantation, the larvae of algae density are released into the food organisms separately dried, brought to (0.5-1, O) " 10 cells / mm and 30-35 ind / m

Fig. 1 shows a general process schedule (basic operations) for growing fry in Fig. 2, graphs of changes in the basic parameters of the habitat in high-volume installations with a volume of 15 O-2 OO l for 25 days of the life of the larvae.

The method is carried out as follows.

Incubation of artificially fertilized eggs and keeping the larvae hatching up to 2–3 days old are carried out at 14–1 hrs in circulating and aerated water incubators. Then, at a rate of 30–50 ind / l, the larvae are transplanted into containers that have a biological filter and a closed circulating system. water in these containers

The temperature of the water is gradually raised from 16 to 25 ° C at a rate of 1-2 ° C per week, and the illumination is changed to 20025 ° Lux in accordance with the daily mode of its change. For 7-8 days before the transplantation of the larvae, cultivators are seeded with photoplankton (TAT make-up artist, algae PEat-imonas v-ind b}, supporting

their concentration at the level of (0.5-1.0) 1O cells per 1 ml, and two or three times seeded with rotifers (Bracri-ioncKS pCicat-ifc-ib) at a rate of 2-3 ind / m

so that by the time of landing of the larvae in the reservoir, the concentration of rotifers would reach a level of 30-3 ind / ml.

Example: Dry fertilized eggs are washed with clean water with an i2-i4 ° C temperature and delivered to the laboratory for and weaning.

After 5 hours, normally developing eggs are placed in aerated incubators with a large circulation of water, where it develops until the larvae hatch. Leeching larvae are incubated for 3 days in these same incubators until they are transferred to an external feed.

Then the larvae are transplanted into special containers with a volume of 15 O-200 l, which have a biological filter and a closed water circulation system. The density of landing of larvae does not exceed 305 O. ind / l.

Tanks at the time of transplantation of larvae in them provide live feed. For this, for 7-8 days before transplanting, they are planted daily with photoplankton (single-cell algae PEatirnonas viriol-ib), maintaining the density (O, 5-1, O) of 1 O cells per 1 ml, with illumination of water 2OOO lux and 16-19 - C, Simultaneously with algae, rotifer was introduced several times in the amount of 2-3 ind / ml.

Algae and rotifers are cultivated separately in special cultivators, increasing to the required density,

By the time of transplantation of larvae, the concentration of rotifers in high-capacity vessels was adjusted to 35 ind / ml, the water temperature was maintained within 16-17 ° C and the illumination was reduced to 2OO-5OO lux.

After a few days, the rosser centering in the tanks begins to fall, due to the larvae eating them. On the 1011 day of the life of the larvae, nauplium argemia are introduced daily in an amount of 3 ind./ml. By this time, the larvae reach a size of 6–8 mm, and their plumage falls due to natural withdrawal from 5–10 ind / l.

Nachkna from 10-12 days; development of larvae, when the end of the rotifer is reduced to 8–10. ECZ / ML, the feeding process of the organisms is carried out in the process of feeding 5. To do this, create a variable CBOTOBOie field in the environment, increasing their mass density by 5-6 times. At 22-25 days, the larvae reach a size of 15-19 mm, and their density drops to 2-3 ind / l. At this time, they are transplanted into nursery plants with a volume of 0.5-1.0 m at a rate of 0.5-1.0 ind / l. In these tanks, the same habitats are maintained, namely: water temperature 22-25 0, salinity 18-18.4%, illumination 2OO-500 lux in accordance with the daily rhythm, Naupliy Artemia daily in the amount of 1-2 ind / ml, 2o

And for the rational use of live food, it is concentrated as noted above. At the same time, the larvae are transplanted at such a time of the day when their physiological activity is minimal or their reduction is achieved by osculately, for example, illuminated by nose.

The proposed method creates the most

Optimal conditions both for incubated spawn and for injecting JQ knock, provides a qualitative selection of material for planting in nursery plants, allows you to adjust and maintain the basic parameters of the obi tai environment within the required limits close to s of the natural ecosystem. Under these conditions, and also due to the rational use of feed, due to their concentration in the process of feeding, high growth rates are achieved and life-sustaining 40 persistent fry are obtained, which are suitable for further extraction of commercial fish from them

Conducted repeated experiments on the frying of the fry of the Black Sea flounder-kalkan show that ma-45s aged 7O or more days, which completed the metamorphosis, reach sizes in excess of 30 mm with a weight of 285305 mg.

Claims (1)

Invention Formula 1, The method of artificial breeding of the Namrsky flounder-kalkan, which consists in incubating pelagic eggs, transplanting the larvae in seawater, containing antibiotics and pre-treated algae and food organisms, and feeding the larvae on 1–11 days of life daily with artemia salies, and the animals dormant. in order to accelerate growth rates and obtain viable fry that have undergone metamorphosis, after incubating the hatching larvae, they are harvested to 2-3 days of age, the larvae are incubated and the eggs are incubated they are dissolved in circulating and aerated water at a temperature of 14-16 0, and the transplanted larvae are transplanted on the basis of the density of planting 30-50 ind / l, and when efsdalnye their content in water is produced when the water temperature increases from 16 to 25 , at a rate of a week and under the illumination of the water surface up to 2OO-5OO lux, and on the 22-25 day of life of the larvae, They are transplanted on the basis of the density of planting O, 5-1.0 ind./l of water in the growth unit, 2, the method according to claim 1, about tl and h and y with the fact that by the time of transplantation, the larvae of larvae of algae density and food organisms grown separately, are adjusted accordingly to (O, 51, 0) cells / ml and 30-35 ind / ml 3, the method according to claim 1, wherein in the process of feeding the larvae, the feed organisms concentrate in water by creating alternating light pop. Sources of information taken into account in the examination 1, Aronovich T. M, et al. Metamorphosis of flounder-flounder larvae in laboratory conditions, - Fish farm, 1977, Nc, 2О-22, a and eiM