Analysis of Growth Performance of Interspecies Hybridization Tor soro (♀) x Tor tambroides (♂) in Concrete Pond

Abstract

Tor (Tor spp.) is one of Indonesian biodiversity freshwater fish species that has a high economic and nutritional value. However, the fish has suboptimal production due to its slow growth to a consumable size. This study focused on analyzing the growth performance of population of Tor spp produced through interspecies breeding in concrete pond environment. Two different Tor breeds were used for reciprocal breeding namely Tor soro (S) and Tor tambroides (T) and resulted in four resulting offspring populations which include two hybrid populations (ST and TS) and two purebread populations (SS and TT). The breeding processes were done through artificial breeding methods with the initial stage involving the use of injected breeding stimulant hormones. The average of initial weight of Tor seed populations that was used in this research is 5.63 ± 2.19 g, with body length of 6.05 ± 1.07 cm. The research conducted in a pond that measured 25 m² over the period of three months. Research show that the hybrid of T. soro x T. tambroides exhibited superior performance than other populations in specific growth rate, feed conversion ratio, and survival rates of 1.42%, 0.56, and 100%, respectively. The research findings also indicate that hybrid Tor fish can thrive and grow well under the water quality conditions of concrete pond environments.