Growth performance of African catfish Clarias gariepinus cultured in biofloc system at high stocking density

Abstract

This study was aimed to analyze the growth performance of African catfish Clarias gariepinus cultured in the biofloc system at high stocking density. African catfish with an average weight of 1.85±0.09 g were cultured in four units of tarpaulin tank at a diameter of 1.72 m and a height of 1.05 m with a volume of ±2,000 L at the different density of 1,000 fish/m 3 ; 1,500 fish/m 3 ; 2,000 fish/m 3 ; 2,500 fish/m 3 . During rearing period, fish were given the artificial feed with protein contents of 28.75% with the frequency of twice a day, as much as 3% of the body weight. The results showed that different treatment of high stocking density in the biofloc system had a significant effect on the absolute growth rate, lipid retention and energy retention (P<0.05) but not significant effect on daily growth rate. The results showed that the highest lipid retention and energy retention were found in the group of fish treated at a stocking density of 2,500 fish/m 3 but declining protein retention and growth in fish occurred. The highest absolute growth rate and daily growth rate were shown by treatment with a stocking density of 1,500 fish/m 3 .Keywords: growth, stocking density, biofloc ABSTRAKPenelitian ini bertujuan untuk menganalisis performa pertumbuhan ikan lele dumbo Clarias gariepinus yang dipelihara pada sistem bioflok dengan padat penebaran tinggi. Ikan uji memiliki berat rata-rata 1,85±0,09 g yang dipelihara pada kolam terpolin berdiameter 1,72 m dan tinggi 1,05 m dengan volume air ±2.000 L sebanyak empat unit dengan kepadatan yang berbeda yaitu 1.000 ekor/m 3 , 1.500 ekor/m 3 , 2.000 ekor/m 3 , 2.500 ekor/m 3 . Selama 40 hari masa pemeliharaan, ikan diberi pakan buatan berkadar protein 28,75% dengan frekwensi dua kali sehari, sebanyak 3% dari berat tubuh. Hasil penelitian menunjukkan bahwa perlakuan perbedaan padat penebaran tinggi pada sistem bioflok memberikan pengaruh yang nyata terhadap pertumbuhan mutlak, retensi lemak dan retensi energi (P<0,05) namun tidak memberikan pengaruh nyata terhadap laju pertmbuhan harian. Hasil penelitian menunjukkan bahwa semakin tinggi padat penebaran terjadinya peningkatan retensi lemak dan retensi energi yaitu pada perlakuan padat penebaran 2.500 ekor/m 3 tetapi terjadi penurunan nilai retensi protein dan pertumbuhan pada ikan. Nilai pertumbuhan mutlak tertinggi ditunjukkan oleh perlakuan dengan padat penebaran 1.500 ekor/m 3 .

Production Performance of Catfish (Clarias gariepinus Burchell, 1822) Cultured With Added Probiotic Bacillus sp. on Biofloc Technology

“…The specific growth rate can be seen in Figure 3. Specific growth rate (SGR) of catfish during the 57-day culture period and the highest results were demonstrated by fish in pond K1 and K2 (2.4 ± 0.2 %/day), K3 (2/3 ± 0.2 %/day), K6 and K9 (2.2 ± 0.2 %/day), K4, K5, K7 (2.1 ± 0.2 %/day), and K8 (1.8 ± 0.2 %/day), respectively, this result higher than previous studies where the gain on 50 days biofloc treatment were 0.87-1.15 %/day (Soedibya et al, 2017). According to Ekasari et al (2016), the addition of Bacillus sp., cells into feed had a positive impact on the fish digestive system due to exogenous enzymes released by cells.…”

“…The culture of fish in ponds K1, K2, K3, and K6 were chosen to be extended because their growth evaluation results were better than those fish in ponds K4, K5, K7, K8, and K9 after a disease outbreak. The daily growth rate K1, K2, K3 and K6 were 0.14 g/day, 0.13 g/day, 0.13 g/day, and 0.10 g/day this result relatively higher than previous study (Soedibya et al, 2017), produce results 0.09 ± 0.02 g/day, 0.13±0.06 g/day 0.10±0.04 g/day and 0.10±0.03 g/day.…”

Potential Identification and Business Development Strategies for Freshwater Fish Cultivation in Ogan Komering Ulu District

“…Freshwater aquaculture in the context of the field of a fishery means the activities of maintaining aquatic biota resources in a controlled freshwater environment carried out by humans. Aquaculture activities are also a productive economic business activity for welfare purposes [3].…”

Development of a Web-Based Automated Production Inventory System

“…Its main role is to provide an audible alert when an item is detected by the E18-D80NK sensor. The activation of the buzzer serves as a real-time indicator, notifying users or operators that an item has passed the sensor point on the conveyor (Wiyoto et al 2023).…”