RU184695U1 - SPRING DEVICE FOR A SHIP - Google Patents

Abstract

The utility model relates to fish farming, and in particular to devices for keeping and preparing for spawning of fish, in particular zander.

EFFECT: improved pre-spawning keeping of fish, increased efficiency of spawning with obtaining full-fledged offspring by improving the design of the device.

The device has a tray, divided by a vertical partition into two compartments, one of which serves to accommodate spawning nests, a vertical partition is installed along the longitudinal axis of the tray, has removable shutter-type valves in the partition along the edges, which serve to allow the producers kept in both compartments to spawn, two flow generators located at the end of the tray, in the water column are removable spawning nests made of propylene, held by weights at the bottom of the tray, on the inner front wall of the tray mountable devices monitoring hydrological and hydro-chemical indicators, two spillway openings on the opposite end of the tray.

Description

The utility model relates to fish farming, and in particular to devices for keeping and preparing for spawning of fish, in particular zander.

A device for incubating fish eggs is known, comprising a chamber and a device for placing eggs, made in the form of a pallet, the walls of the chamber are perforated in the form of a hemisphere with an aperture at its apex, covered by a mesh screen, a layer of spawning substrate is attached to the pallet, and the inner volume of the chamber is filled with granules with the possibility of their free movement inside the chamber, and the density of the granules is less than the density of water. Moreover, the chamber is mainly made with a diameter of 350-400 mm with a mesh size of perforation of 3-6 mm. It is advisable to fill the inner chamber volume on 1 / 4-1 / 3 with free-floating spherical granules with a diameter of 20-25 mm, made on the basis of expanded clay and / or noise, and / or expanded calcined clay. Pebble or gravel in the form of spherical granules with a diameter of 20-25 mm was used as a spawning substrate. Mounting holes are formed in the bottom of the chamber (see RF patent No. 38532, 2004).

However, in it there are no devices allowing separate keeping of producers, pre-spawning preparation of fish.

The closest in essence is a device for the incubation of fish eggs attached to the substrate of spawning nests, containing a tray divided by a vertical partition into two compartments, one of which serves to accommodate spawning nests, and the other to maintain larvae, a vertical partition is installed along the longitudinal axis of the tray with the formation of compartments of the same volume and made not reaching the upper edge of the tray, and in the compartment for keeping the larvae an additional vertical transverse partition was mounted, not necessary leading to the upper edge and bottom of the tray and forming a section for receiving larvae with the end wall of the tray, while a tray for removing larvae is inclined along the upper edge of the longitudinal vertical partition, the lower output end of which is located above the section for receiving larvae, (A.S. USSR No. 948352, 1982).

However, this device does not provide temperature and current control, automatic control of environmental parameters, pre-spawning preparation of producers, which reduces the effectiveness of spawning and further incubation of eggs.

The technical problem is the creation of a biotechnological device for keeping and preparing for spawning of pikeperch in controlled conditions that exclude natural and climatic risks and simulate natural environmental conditions by improving the design of the device.

EFFECT: improved pre-spawning aging of fish, increased efficiency of spawning with obtaining full-fledged offspring by improving the design.

It is achieved by the fact that the known device containing the tray, divided by a vertical partition into two compartments, one of which serves to accommodate spawning nests, the vertical partition is installed along the longitudinal axis of the tray, additionally has removable shutter valves in the partition along the edges, which serve to pass manufacturers contained in both compartments before spawning, two streaming agents located at the end of the tray, removable spawning nests made of propylene, held by cargo, are located in the water column E on the bottom of the tray on the inside front of the tray fixed control devices hydrological and hydro-chemical indicators, two spillway openings on the opposite end of the tray.

Removable sandors allow skipping and separation of males and females of producers before and after spawning. Removable polypropylene spawning nests make it easy to move and install before spawning and during spawning. Weights hold the nests in a specific position and in certain places of the tray compartments.

Flow generators provide different modes of water flow during spawning and further incubation.

Control devices (temperature, oxygen, flow rate sensors) allow continuous monitoring of the parameters of the aquatic environment.

The proposed device is shown in the drawing - FIG. 1 (top view). The device is a tray 1, with two flow generators 2, located at the end of the tray, divided into two compartments 3, 4 by a longitudinal partition 5 having removable gate valves 6, 7 on both sides for separate and joint keeping of pike perch producers, in tray 1 is thicker four removable spawning sockets 8 made of propylene, held by sinkers 9 at the bottom of the tray, and instruments for monitoring hydrological and hydrochemical parameters are fixed on the inner front wall of the tray 1: solution sensors nnogo oxygen 10, temperature 11, flow rate 12, two weir openings 13 at the opposite end of the tray 1.

The installation works as follows: water is preliminarily prepared for which a water treatment unit is used, which has a chiller, heat exchangers, mechanical and biological filters, connected in series by pipelines, the water flow in the water treatment unit is carried out by a pump group located separately from the main device (see patent), pike perch producers are kept in tray 1, separately in two compartments 3-4 (females and males separately), using spreaders 2 they regulate spawning environment parameters and They are monitored using instruments for controlling hydrological and hydrochemical parameters (dissolved oxygen sensors 10, temperature 11, flow rate 12), then, when the spawning state is reached by the manufacturers, they lift the removable valves 6, 7, install removable spawning sockets 8 made of polypropylene in the compartment 4 and are held at the bottom tray cargo 9, after spawning, install one of the valves 6 for removal and concentration of producers in compartment 3, then install the second valve 7.

The proposed setup allows pre-spawning preparation of spawners, spawning and incubation, regardless of the season, taking into account the biological characteristics of the reproductive cycle, and improves the efficiency of spawning and the quality of the offspring.

Claims (1)

Spawning device for pike perch, containing a tray divided by a vertical partition into two compartments, one of which is used to accommodate spawning nests, a vertical partition is installed along the longitudinal axis of the tray, characterized in that it has removable shutter type valves in the partition along the edges, which serve for manufacturers to pass contained in both compartments before spawning, two streaming agents located at the end of the tray, removable spawning nests made of propylene, held by loads on at the bottom of the tray, on the inner front wall of the tray, there are fixed gauges for hydrological and hydrochemical indicators, two spillways on the opposite end wall of the tray.

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