ND 41 Tilapia

The ND41 is a hybrid tilapia strain. This strain is produced by crossbreeding a male Blue tilapia (Oreochromis aureus) of the ND-1 Tilapia family line with a female Blue tilapia (Oreochromis aureus) of the ND-4 Tilapia family line. Both strains used to produce this strain are man-made and has been developed by selective line breeding to make sure that they contain desirable genetic material. Using other strains of the same species will not produce the same result.

The main advantages of ND41 are:

• The ND41 tilapia is a mono-sex tilapia. Some females might occur due to the risk of foreign genetic material and the average proportion of males is therefore 98 percent. Two percent females are not enough to affect the productivity negatively and can therefore be seen as acceptable.
• This is a very fast growing strain of tilapia and it will outgrow Oreochromis nilotica in the temperature range 22-25 °C (72-77 °F). They do however grow less fast in warm temperatures and in the temperature range 29-31 °C (84-88 °F) they grow slower than Oreochromis nilotica.
• The ND41 tilapia is a calm and docile strain making handling, sorting and harvesting very easy. Their compliant nature will help to greatly reduce fish fatalities associated with handling.
• The ND41 tilapia can be bred in very cold waters compared to most other tilapias. It can be both kept and produced in low temperatures (down to 20 °C / 68 °F), something which makes it ideal for use outside the tropics.

ND21 Tilapia has the same resilience as pure line Oreochromis niloticus to Streptococcus infection.