Climbing Perch fish are thought to have different growth rates related to sexual dimorphism, female Climbing Perch fish grow faster than male fish, so there is potential for monosexual female cultivation.
The activity was carried out at the Mandiangin Freshwater Aquaculture Development Center (MFADC). The results of the masculinization activity by oral of the hormone 17α-methyltestosterone through feed at a dose of 50 mg/kg feed for 30 days in papuyu fish aged 14 days after hatching resulted in a male ratio reaching 94.19% - 100%, the masculinized fry were then raised for 12 months until they became broodstock. , then a progeny test is carried out to determine the functional male sexual status.
Results of the progeny test on 120 male papuyu fish resulting from sex reversal, mated with normal female fish (1: 1) and six functional males were obtained. The sexual status of functional male fish is proven by the female sex ratio value of 81.10% - 93.90% in one population of test fish offspring. This confirms that masculinization techniques in Papuyu fish can produce functional males. If the masculinization process is repeated on the next offspring, it will be certain that the juvenile fish will produce perfect functional males (neomales), which will facilitate the mass production of female Papuyu seeds.