Aquaculture Technology

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Jar Incubators - Vertical Incubators - Horizontal Incubators - Egg Sorters

Jar Incubators

Plexiglas 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 uniformly 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 preferred water flow so that the eggs at the base are rotated uniformly 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 swim out at just the right time. Now you can virtually duplicate nature's way of hatching eggs with this durable, see-through incubator jar. So next time you want your eggs "over easy", make sure you are using this hatching jar.


Plastic incubation cylinderINCUBATION CONTAINERS made of plastic

For breeding of larger quantities of fish eggs (like salmonids), normally from fertilization to hatching, this special silos made of plastic have been proven. The cylindrical egg container has a volume of approx. 30-60 l (diameter 33-48 cm, height 65-90 cm) and is delivered complete with in- and overflow, as well as screen and stand.

For holding of larger quantities of fish larvae (like cyprinids), normally from hatching to feeding, this special silos made of polyester are available. These conical larval containers have a volume of approx. 90-240 l (diameter 65-87 cm, height 113 cm) and are delivered complete with in- and overflow, as well as screen and 3 feet made of stainless steel.


Weiss Jar SystemINCUBATION JAR SYSTEMS with overflow

This simple and cheap jar system is suitable for hatching of eggs of various fish species, like carp, pike, perch, catfish, burbot, sturgeon etc. It is made of stainless steel frame and saves space and water. Each "Weiss or Zoug" jar made of glass with a volume of about 9 liters and bottom sieve, has a its own inlet pipe with valve and a overflow with pipe, so that it can be supplied individually with water. After hatching the larvae usually leave the jars by themself with the water flow or are removed by the farmer from the jar. The system can be build with any number of jars (up to 10 pieces in single and up to 20 pieces in double row).


Zough Jar SystemBREEDING JAR SYSTEMS with top tank

This well designed systems are made of stainless steel and are equipped with "Zoug or Weiss" jars made of glass which can be removed and serviced separately. Through the inlet tank on top, which allows to degas the water, all jars can be individually supplied with water. The tank and feet's are somewhat adjustable in height. The eggs of various fish species (Cyprinids, Silurids, Esocids, Coregonids, Acipenserids etc.) are incubated in the jars and rotated gently by the water flow. 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 accessories. The standard systems have dimensions (LxWxH) of 115-215x40x165-185 cm and are equipped with 3-7 glass jars each with a volume of 8 liters. Other sizes or 3 liter jars are possible on request. Single jars with or without stand support are available too.
The system can optionally be equipped with a heating/cooling system and in connection with an UV-sterilizer operated in recirculation.

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Vertical Incubators

Vertical Incubator with 10 traysVERTICAL INCUBATORS to save space

This vertical incubators, originally developed in America but now produced in Asia, guarantee safe conditions for the professional breeding and hatching of salmonid eggs (like: salmon, trout, char etc.) and can be combined and arranged in different ways, to utilize the available space as effectively as possible. The water (min. 5 l/min) from the inlet, flow trough the trays on which the eggs stay, 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 water. Without disturbing the other trays, each tray (approx. 62x52x8 cm) can be drawn out and controlled easily and provides in the inserts (approx. 45x37x5 cm) perfect conditions from the fertilized egg to the swim-up stage. They are available with 5, 8, 10 and stacked with 16 or 20 trays for up to 1 liter or 10,000 eggs per tray) made from strong non toxic (blue/green) plastic material and includes the aluminum or stainless steel frames (approx. 64 cm deep, 58 cm wide and approx. 51, 84, 100 and 175 or 210 cm high, changes reserved) with 4 adjustable feets and all egg trays with polyester screens (approx. 1-2 mm).


Vertical Incubator with top tank and support frameVERTICAL INCUBATORS to save water

This vertical incubator, newly developed and produced in Europe, allows optimal conditions for the incubation and hatching of salmonid eggs (like: trout, charr, grayling etc.) and save water. The water (only 1.8 l/min) from the top tank with float switch and filter tube flows by gravity trough the trays, from the central inlet funnel through the sieve baskets where the eggs stay, and leaves the tray via the outlet holes all around the sides, where if lows down the cone shaped tray to the next one a.s.o., so that all trays will be supplied with sufficient oxygen. Without disturbing the other trays, each tray can be drawn out and controlled easily and provides optimal conditions from the fertilized egg to the swim-up stage. The corpus made of black plastic has a removable and roll-up front cover also made of plastic material, which reduces light within the incubator. The incubator is available with 10 trays and baskets (for 100.000 eggs respectively up to 1 liter eggs per tray) made from aluminum (approx. 40 cm diameter and 5 cm high). The whole incubator has dimensions (W x D x H) of 48 x 62 x 128 cm. A support frame (45 cm high) made of stainless steel is available as accessories. The system can optionally be equipped with a heating and/or cooling system or operated in recirculation.

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Horizontal Incubators

Breeding through with traysBREEDING TROUGHS for salmonid eggs

The horizontal troughs allow an easy survey of the breeding process and are available for 2 to 7 baskets approx. 40 x 40 cm (for up to 1-2 liter eggs each) made from smooth reinforced glasfiber polyester (approx. 120, 215 or 360 cm long). The screen (1-2 mm holes) of the egg incubation baskets are fitting exactly. The water (min. 0.1 l/sec) from the front, flows through the baskets on which the eggs stays, and leaves the trough 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. Optional an outlet screen is available. This throughs can also be used for start-feeding of the fry after the yolk sac has been absorbed.


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 (like salmon or trout, other species on request) in natural streams. The flood save and closeable box is made of stainless steel with dimensions of (LxWxH) 90 x 20 x 13 cm, weight approx. 13 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 5 baskets, which can be fitted with special hatching substrate to reduce maintenance. Under „normal“ conditions, the maintenance is limited to the periodical control (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 themselves 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 (up to 1 l/set) are incubated on the green or grey hatching substrate as usually practiced. After hatching the larvae move trough the spaces (about 2x15 mm) and shelter in the substrate nipples of the soft rubber like plastic substrate (3 cm high). The hatching substrate imitates the gravel substrate naturally occurring in the streams 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, and growth improves (up to 10-20 %).

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Egg Sorters

Manual egg sorting deviceMANUAL SORTING DEVICE for salmonid eggs

Formerly and originally developed at the Austrian Institute 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 suction ball has to be pressed until the unit overflows at the tube end. Now, each egg can be advised with the suction 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 up to 100,000 salmonid eggs per hour. It is available with both live and dead egg 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. Optionally a special disc is available, to sort small eggs like grayling. 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. 80 x 35 x 28 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. A water and air supply is needed for operation.
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 hatchery or nursery systems on request!

Recirculation - Netcages - Feeding - Aeration - Monitoring - Processing - Equipment

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