SU1409177A1 - Method of cultivating rotizera - Google Patents

Description

(21) 4072840 / 28-13

(22) 04/08/86

(46) 07.15.88. Bul No. 26

(71) Azov and Scientifically-Research Institute of Fisheries

(72) E. I.Aksenova, N.X. Idrnsova and E.N. Bakaeva

(53) 638.36 (088.8)

(56) Vasilyeva G. D., Okuneva G. A. Experiments on breeding rotifers Brachionus rii bens Ehrens j as food for juvenile fish. - Questions nkhgiology, 1961, t. I, vol. 4 (21) s. 752-761.

(54) METHOD FOR CULTIVATING PADS

(57) The invention of fish breeding and aquaculture is possible and can be carried out. 1b:) van (for hyuvinenm feed ba: I) 1 fish-holding ponds. Iiln) invention c. Its increase in food supply piji6oBo.uibi () V. To do this, put the stationary box at least into the dry bed of the ponds before filling them (I 1 table).

(f

WITH

her

The image relates to fish farming and aquaculture and can be used to enhance the feed phase of fish ponds.

The aim of the invention is to increase the food supply of fish ponds due to the intensive development of rotifer culture in water bodies, which occurs as a result of the addition of resting rotifers to the dry bed of the pond.

The method of cultivating rotifers is carried out as follows.

In the spring, after carrying out agromeliorative measures before filling the ponds, a resting bed of rotifers is placed in a dry bed along the coastline. Ponds are poured with water, and in the period before it is stocked, rotifers from the eggs gradually develop and the population develops, in rezu, for which, by the time stockpiling in ponds, there is already a food base for fish.

Example. 10 days before the ponds were poured into three four-hectare ponds of Brachionus calyciflorus Pallas cataculum at the rate of 10 mg / m, 25 mg / m, 50 mg / m, respectively, and in one such pond (control) the rest of the rotifers ne. t. In addition, a vegetative culture of rotifers and microalgae was introduced into all the ponds (100l of the rotifer culture of Bt IL; iruyuschuyu :: ture, and

current with biomass of 800. mg / l and 80 l of microalgae with biomass of 1000 mg / l). The temperature of the water in the ponds is 18–20 ° C, pH 7.0–7.5. The results of the experiments are summarized in the table, from which it can be seen that putting the rotifers on the dry bed of the pond even in an amount of 10 mg / m has positive effect on the natural food supply of the pond. However, taking into account the same survival rates of rotifers and a slight difference in the total biomass of zooplankton in and control (ponds 1 and 2), it is advisable to put at rest the rotifers in the amount of not less than 0.025 g / m bed on the dry bed of the pond, which gives a more noticeable effect compared to with control for all indicators m.

Claims (1)

Invention Formula The method of cultivation of rotifers in fish ponds as a starter feed for fry of young fish, which is to be introduced into the pond after the vegetative culture of rotifers and a nutrient suspension, in order to increase the feed capacity of the ponds before filling the reservoir The resting eggs of rotifers should be additionally added to the dry bed in an amount of at least 0.025 g / m.