Arowana Gender Index (AGI)
All info and pictures taken from Qianhu.com
Asian Arowana (Scleropages formosus) breeding in the region is normally
restricted to earthen ponds. One of the limiting factors in increasing production is the inability to determine the sex of
the brooders. Determining the sex of the arowana is important in determining the sex ratio of the brooders to maximize breeding.
In a collaboration R&D effort between Qian Hu and Mr Alex Chang of Ngee Ann Polytechnic, a novel approach of sex
determination of the brooders using the Arowana Gender Index (AGI) was developed. Now commercial ornamental fish breeders
can use this information to better determine the model ratio of the two genders to achieve the highest number of juvenile
Arowana. This method offers a cheaper, simpler and efficient alternative to the traditional expensive DNA studies.
method uses the differences in the relationship among the linear measures of the male and female adult asian arowana. The
method yields high percentage accuracy (70%) and the index will greatly enhance the productivity of arowana breeders. This
index can be used on Arowana fishes that are one year old and above. As the index uses data from healthy and non-deformed
fishes, the accuracy of the index is only applicable to normal, healthy fish.