SU938865A1 - Method of growing fodder organisms for fishes - Google Patents

Description

(S) METHOD OF CULTIVATING FOOD ORGANISMS FOR FISH

one

FIELD OF THE INVENTION The invention relates to fish farming, in particular, to methods of growing feed organisms used in breeding fish in hatcheries.

Closest to the proposed technical essence is the method of growing food organisms for fish, involving the cultivation of artemia; (Artemia salina) in saline solution, in which feed yeast, algae, as well as fertilizers for the development of bacterial flora 1 are introduced as feed.

However, when growing artemia in a monoculture, the feed base is not fully utilized and the biocenosis remains unsaturated.

The purpose of the invention is a more complete use of food resources and an increase in the biomass of food organisms.

To achieve this goal, the method of cultivating artemia in a saline solution with feed in it, in an artemia saline solution, eggs of efidra, previously subjected to activation, and a culture of blue green algae, substrate of efidra, are expedient; make in the amount of 200 pcs / m solution.

In addition, it is advisable to activate the eggs by keeping them at (-2) - (+3) ° C and humidity 25-AO% for 120-1 0 days. For this purpose, a saline solution is prepared in the pool, to which hydrolysis yeast and sea chlorella are then introduced, and a culture of mature artemia at the rate of 200 shi / m and activated eggs of efidra in the same amount, as well as a culture of blue-green algae are introduced into the pool. as a substrate. To preserve the uterine culture of Efidra, the pool is closed with a mesh cloth. 393 The larvae from the eggs of Efidra hatch upon reaching, and the embryo breaks the shell of the egg and floats to the surface of the water. At this time, the larva undergoes a series of morphological changes, acquiring the appearance of an adult. Ephidras, which are caught along with Artemia by means of a butterfly, are most suitable for fish food. Efidra becomes an adult between 16 and 20 days and begins to multiply by laying eggs on algae or in water, where the eggs attach to a substrate that covers the walls of the pool or to floating algae. Example. In daphnia pools of 50 m, salt is added in an amount of 1 m and water is poured in a layer with a height of 1 m, resulting in a salinity solution. Ephidras' eggs are introduced into the resulting solution at the rate of 200 pcs / m, which are preliminarily subjected to activation, for which they are first placed in a solution of sodium chloride at a concentration of 10 and kept for 8 hours to reach their moisture content and then the eggs are placed in plastic bags. or crates and kept at for 140 days. The number (ind./m) and the mass of efidra cultivated in the condition

Artemi (role 236, 0 role)

200

Artemy

200

Efidra

200

Artemi (cont256, 0 role) 200 502.0

Artemi 200

158.4

8k, 2

18.7

101.0

13.0 1058.5

11576

128.4

, 8 1027.2 2 7 Along with the eggs of Efidra, hydrolysis yeast at the rate of k g / m and sea chlorella in the amount of 1000 ml of suspension / m are introduced into each pool. Through the day when the solution reaches 16.0 in the morning and 2b, 8 In the midday hours, artemia in the amount of 200 pcs / m is introduced into the pool, and then blue green algae culture at the rate of 20 ml / m. Subsequently, in the cultivation of artemia and efidry, the hydrolysis yeast is introduced after 2-3 days at the rate of 10 g / m. In the process of growing water level is also maintained. Example 2. The cultivation of artemia and efidra is carried out according to Example 1, but the salinity of the solution is. Example 3- Growing Artemia. and Efidra is carried out as in Example 1, but the salinity of the solution is. At the same time, the control cultivation of artemia was carried out at the same salinity of the solution, adding 200 pcs / m solution to it. Growth data is shown in the table. m) Artemia and larvae of different salinity

90 Artemi

Table continuation

2ЖЗ

53.6

6976

Claims (3)

Claim 1 . A method of growing fish feed organisms, involving the cultivation of brine shrimp (Artemia salina) in a saline solution with the addition of feed into it, characterized in that, in order to more fully use food resources and increase the biomass of the feed organisms, eggs of ester are introduced into the saline solution with artemia, previously subjected to activation, and a culture of blue-green algae, which are a substrate for epidra. 2. The method according to claim 1, about t and h and u ~ sh and y with the fact that the eggs of epidra contribute in the amount of 200 pcs / m ⁵ solution. 3. The method according to PP. 1 and 2, characterized in that the activation of the eggs is carried out by keeping the eggs at (-2) - (+ 3) ° С and humidity 25–40% for 120–140 days.