A photo of carp eggs which require washing
before incubation to avoid sticking
A microscopic view of larvae |
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In carp spawning, the sperm is firstly mixed in a separate bowl, and then about 2 cm3 is distributed over the 0.5 litres of eggs, which have been stripped from the female. On average, eggs of 3-5 females are fertilized with sperm collected from two males. A higher number of males ensure an appropriate level of genetic variability, as well as a higher rate of successful fertilization. Water is added gradually to assist the mixing of the sperm and the eggs. Swelling is the process, which directly follows fertilization.
Eggs of trout, pike and the majority of the cyprinids are very sticky and should be washed a few times before incubation; otherwise they will aggregate into lumps in the jars. Washing should last from several minutes to a few hours, depending on the species. Very sticky eggs (other cyprinids) can be washed with a solution of salt or talc. Talc (hydrated Magnesium Silica) slightly increases the egg weight and prevents mould development.
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