Nauplii are crustacean larvae used by aquarists as food for fry. The most suitable naupliuses as live food for fry are the larvae of copepods, their size is 0.12-0.22 mm, many reservoirs are rich in them when spring comes when the water warms up. The naupliuses of marine brine shrimp, which have just emerged from caviar, are also popular.
Sea artemia can be caught in warm salt-water estuaries.
Caviar of sea artemia can be stored for a long time in a dry and cool place without spoiling, and when suitable conditions are created for it, nauplii will appear from it. This is a big plus of sea artemia caviar because it allows you to have on hand a good live feed for fry precisely at the moment when it is needed.
Before incubation, the caviar of sea artemia is recommended to be treated with 1.5–3% hydrogen peroxide solution for 15 minutes and dried again. In a three-liter jar filled with tap water, you need to add 3 tablespoons of regular table salt, wait for the salt to dissolve and add an incomplete teaspoon of caviar of sea artemia.
During the entire incubation period, it is necessary to aerate the can with a compressor and sprayer, the incubation period is 1.5-2 days. For “harvesting,” the compressor is turned off, the eggs that have not had time to hatch settle on the bottom of the can, then, after several layers of clean gauze, half of the volume of water is poured into another container and re-poured into the first “without gauze”.
The orange mass remains on the gauze and there are newly hatched Nauplius Artemia that can be fed to the fry in parts. After this procedure, you can again add to the jar a new portion of caviar.
In the process of incubation, caviar does not need any lighting, so you can put the container in a dark place.
The best results in incubation gives sea water instead of salted tap water, so the next time you go to rest on the sea – stock up on a 5-liter bottle.
Only hatched nauplius of the marine Artemia have a very high nutritional value, and they have no shell, so that the fry can easily feed on it. For larger fry, Artemia adults can also be used, although it is worth considering the fact that the grown Artemia do not have such high nutritional value.
At present, many pet stores specializing in aquarium fish can buy Artemia eggs quite inexpensively, some companies even produce ready-made kits for breeding Artemia nauplius at home.
For an adult fry aged 8–10 days, the most nutritious live food is Daphnia nauplius. These naupliuses appear in large numbers in summer in stagnant reservoirs for a short time, and therefore it is quite difficult to catch it.
If you liked the video – share with friends: