Aquaculture Technology

Incubation Systems


Jar Incubators

Plastic Hatching JarHATCHING JARS made from plastic

Used successfully for over 20 years by federal, state and professional hatcheries and fish producers here and abroad, this McDonald type hatching jar become the standard of the fish farming industry. It can be used for a wide variety of species like: Salmonids, Thymallids, Coregonids, Acipenserids, Percids, Cyprinids etc. Made of clear, high impact, easy to clean plastic, this uniquely designed hatching system enables uniformely distributed water to rotate fish eggs ever so gently and evenly. It works very simply as water from the supplying hose is directed down to the open-ended feeder tube in the center of the jar. The tube (diameter 3 cm = 1.25 in.) easily accommodates the prefered water flow so that the eggs at the base are rotated uniformely and precisely. The jar has a height of 45.8 cm (18 in.) a diameter of 16 cm (6.25 in.) and a volume of 6.86 l (232 oz.). It weighs only 2.5 pounds (1.1 kg). A circular filter/mesh screen prevents eggs from spilling out of the jar, while the large spout (length 7.5 cm = 3 in., width 5.3 cm = 2 in.) at the top lets hatched fish swimm out at just the right time. Now you can virtually duplicate nature's way of hatching eggs with this durable, seethrough incubator jar. So next time you want your eggs "over easy", make sure you are using this hatching jar.


Zough Jar SystemJAR SYSTEM made from stainless steel

This well designed systems are made of stainless steel and are equiped with "zougg or weiss" glass jars wich can be removed and serviced seperatly. Through the inlet tank on top, all jars can be individually supplied with water. The tank and feets are soemwhat adjustable in height. The eggs of various fish species (Cyprinids, Esocids, Thymallids, Coregonids etc.) are incubated in the jars and rotated gently by the water flow. After hatching the larvae usually leave the jars by themself with the water flow or are removed by the farmer from the jar. A breeding cone for salmonid eggs and an overflow sieve (1-2 mm holes) to avoid eggs or larvae being spilled out by water, is available as accessoire.
The standard systems have dimensions (LxWxH) of 80-200x40x165 cm and are equipped with 3-7 glass jars each with a volume of 8 liters. Other sizes or jars are possible on request. Single jars with or without stand support are available too.
The system can be equiped with a heating/cooling system and in connection with an UV-sterilizer operated in recirculation.

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Tray Incubators

Vertical Incubator with 8 traysVERTICAL INCUBATORS for salmonid eggs

This vertical incubator guarantees safe rearing conditions and is available with 4, 8 or 16 trays approx. 60 x 60 cm (for 50.000, 100.000 or 200.000 eggs respectively up to 1 liter eggs per tray) made from strong non toxic plastic material and includes the aluminum frames (approx. 44, 82 or 175 cm high) and all egg trays (approx. 50 x 40 x 4 cm) with PVC coated polyester screens. Optional an isolation panel (clear or black) is available.
This incubator for the professional breeding and hatching of eggs and fry can be combined and arranged in different ways, to utilise the water and space as effectively as possible. The water (approx.
0.1-0.2 l/s) from the inlet, flows through the trays on which the eggs stays, and leaves the water tray over the front during the side canals to the next tray, were it flows again through the egg tray and so on, so that all trays will be supplied with sufficient oxygen. Without disturbing the other trays, each tray can be drawn out and controlled easily.


Breeding through with traysBREEDING THROUGHS for salmonid eggs

The horizontal throughs allow an easy survey of the breeding process and are available for up to 4 or 7 baskets approx. 40 x 40 cm (for up to 1-2 liter eggs each) made from smooth reinforced glasfiber polyester (approx. 215 or 360 cm long). The stainless steel screen (1.5-2.0 mm holes) of the egg incubation baskets are fitting exactly. Optional an outlet screen is available.
This throughs can also be used for startfeeding of the fry after the yolk sac has been absorbed. The water (min. 0.2-0.4 l/sec) from the front, flows through the baskets on which the eggs stays, and leaves the through at the back side, so that all baskets will be supplied with sufficient water. Without disturbing the other baskets, each basket can be controlled easily from the top.


BREEDING BOXES for running waters

Breeding Box (open)An experience of many years in egg incubation and fry rearing, as well as stocking experiments in various waters, where the base of this new and innovative invention for the hatching of salmonid eggs in natural running waters. The flood save and closeable box is made of stainless steel with dimensions of (LxWxH) 85 x 20 x 12 cm, weight approx. 8 kg). It is used for the professional and controlled incubation and hatching of salmonid eggs as well as for the breeding and rearing of fry for (re)-stocking purposes. The box is simply set into the water (front flap against the current and cover a little above the water line) and anchored by the eyes to the bottom ground. Depending on fish species and egg size, the box supports a save environment for up to 10.000 eggs and fry until exogenous feeding. The eggs lay in baskets, which can be fitted with special hatching substrate to reduce maintenance. Under „normal“ conditions, the maintenance is limited to the periodical controll (1 x per week) of the system, where results of 90-95 % are reached in average. When the fry reach the stage of exogenous feeding they can distribute themselve in the brook or river.


Hatching substrateHATCHING SUBSTRATE for vital fry

Mainly for salmons, but also for many other salmonids, this 2-layer hatching substrate (40x40 cm) have been used and proven well. The eggs are incubated on the hatching substrate as usualy practized. After hatching the larvae move trough the spaces and shelter in the substrate nipples of the soft rubber like plastic substrate. The hatching substrate imitates the gravel substrate naturaly occuring in the brooks or rivers and provides optimal developmental conditions for the fish larvae. The fry are therefore stronger and healthier, they also have less deformations and lower mortalities.

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Egg Sorters

Manual egg sorting deviceMANUAL SORTING DEVICE for salmonid eggs

Formerly and originally developed at the Austrian Institut of Fisheries Economy in Scharfling, this handheld egg sorting device has been rebuild, allowing to select dead Salmonid eggs now easily and fast. The pistol-formed device has to be hold at the handle with one hand, with the other hand the sucktion ball has to be pressed until the unit overflows at the tube end. Now, each egg can be avised with the sucktion pipe and if the button at the handle is pressed, it will be sucked (with water) into the plexiglass collecting unit. The collected eggs are stored in the collecting unit (with sieve) and the water overflows at the at the hose, which hangs to the bottom. With some experience, it is possible to work with this device fast end exactly. Where no automatic sorting machine is available, it is the best professional device for sorting Salmonid eggs manually.


AUTOMATIC SORTING MACHINE with fiber optics and infrared light

Automatic egg sorting machineThis fish egg sorting machine uses the most current technology to sort 100,000 salmonid eggs per hour. It is available with both live and dead egg counter or also without counters. Using the patented standard disk, the egg sorter will sort salmonid eggs from 5,000-18,000 per kg (150 to 500 per ounce), or if equipped with the salmon disk, it will sort any size salmon egg. Best of all, you never have to change disks to handle different sizes of eggs. The patented technology uses fiber optics and modulated infrared light to scan the egg and assure the highest level of accuracy (approx. 98-99 %). It has been used around the world and will accommodate any local voltage. In the interest of safety and reliability, the local voltage is reduced to 12 volts DC. It has dimensions (LxWxH) of approx. 78 x 35 x 27 cm (32 x 14 x 11"), a weight of 23.4 kg (52 lbs), and an egg tank capacity of 19 liters (5 gallons) and is made of clear and white acrylic plastic.
Eyed eggs are placed in the trough with water flowing through the bottom. Several kilogram of eggs may be loaded at one time. The water flushes the "eyed" eggs against the patented disk where they are captured in the tapered holes in the outside of the disk. Once the egg sorter is fitted with the disk matching the type of egg you are sorting (trout or salmon) it will sort any size egg inserted. The eggs in the disk then pass an electronic scanning device which, using modulated infrared light, detects dead eggs. All with 100 % ambient light immunity. Dead eggs are then ejected out one side of the sorter while the live eggs travel to the opposite side where a gentle flow of air ejects them into a curtain of water which carries them to a separate container - safe, sound and ready for further incubation. The counters then increment, providing accurate totals of both live and dead eggs sorted. Each time a dead egg is detected, a light comes on giving you visual assurance that everything is working correctly.

Additional breeding and raising systems on request!

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