Hatching and survival sates of Asian Redtail catfish larvae (Hemibagrus nemurus) in two different hatching systems

• Published in: Limnotek Vol. 25; no. 2; pp. 58 - 64
• Main Authors: Prakoso, V A P, Subagja, J, Radona, D, Kristanto, A H, Gustiano, R
• Format: Journal Article
• Language: Indonesian
• Published: Bogor 01.01.2018
• Subjects: Aquaculture; Biological fertilization; Dissolved oxygen; Fish; Fish hatcheries; Freshwater; Freshwater aquaculture; Freshwater fishes; Hatching; Hemibagrus nemurus; Individual rearing; Inland water environment; Installation; Larvae; Ova; Parameters; Survival; Technology; Temperature; Water quality; Weight; Indonesia
• ISSN: 0854-8390; 2549-8029

One of the freshwater fish commodities in Indonesia that has the prospect for aquaculture is Asian Redtail Catfish (Hemibagrus nemurus). However, aquaculture technology for this species still needs to be improved, especially the hatchery system to increase the productivity. One technology that can be developed is egg-hatching technology. This study aims to obtain the higher hatching rate and survival rate of Asian Redtail Catfish larvae through two different hatching systems. The research was conducted at the Installation for Freshwater Aquaculture Germplasm Research, Cijeruk, Bogor in August 2017. The eggs were obtained from the second generation of domesticated Asian Redtail Catfish (female weight 443.3 ± 70.9 g, male weight 486.7 ± 83.3 g). The hatching methods tested were the tray and funnel systems with each system consisting of four replications. The parameters observed were hatching time, hatching rate, and larval survival for two days. Water quality parameters measured included temperature, dissolved oxygen, and pH. The results showed that at the same temperature range the larvae firstly hatched at 34 h after fertilization in the funnel system, while in the tray system the larvae firstly hatched at 36 h after fertilization. The hatching rate in the funnel system (65.79 ± 5.49%) was higher than in the tray system (30.60 ± 1.91%) with P < 0.05. There was no significant difference found in the survival rate for two days of larvae rearing between hatching systems (93.88 ± 1.89% in the tray system, 94.75 ± 2.22% in the funnel system). Based on the results, it can be concluded that the hatching system using a funnel resulted in two hour faster egg hatching and twice the hatching rate, but no significant difference in the larval survival rate compared to the tray system.