The Effect Of Male-Female Ratio On Reproductive Performance Of Harlequin Rasbora Fish ( Trigonostigma Heteromorpha)

Abstract

Due to the demand in ornamental fish and lack of regional stock and especially the Harlequin Rasbora fish (Trigonostigma heteromorpha) the Research and Development center for high technology Agriculture (AHRD) was starting the research to improve the reproductive performance to increase the stock production. This study was conducted to determine the effect of the male and female ratio to the reproductive performance of the Harlequin Rasbora fish (Trigonostigma heteromorpha) to help increase out stock production. The study includes 4 treatments with the different ratio between male and female: 1:1; 2:1; 3:2 and 7:5. There are 2 phenotypes of the Harlequin Rasbora fish that were chosen to conduct the study (Yellow and Red). Each treatment is repeated 3 times with 2 different scale factors number that is 1 and 2 with the total number of 24 breeding tanks per phenotype. The result proves that there is a correlation between male and female ratio to the reproductive performance of the fish. The survival rate of fish was over 86% at 45 days. While treatment 1 (ratio of 2 males: 1 female) and treatment 2 (ratio of 3 males: 2 females) bring back the highest reproductive performance and positive data on the topic of relative fecundity, Fertilization rate and Hatching rate. There are no significant differences between the red and yellow phenotype. Thus, the further study should consider expanding into other types of Harlequin fish to enhance our stock production.