Main Subjects : Fish Pond

Administration of Nitrobacter as Ammonia Decomposer in Maintenance Media of Clarias gariepinus with Aquaponics

Prayogo Prayogo; Boedi Setya Rahardja; Adinda Septyasari Taragusti

Iraqi Journal of Veterinary Sciences, In Press
DOI: 10.33899/ijvs.2019.126116.1243

Abstract. Many Indonesian catfish farmers apply the aquaponics system to overcome the problem of limited cultivation land. However, the use of high-stock solid method on aquaponics system causes a decrease in water quality due to the accumulation of fish feces and food scraps that are not consumed by fish and are left to pile up and turn into ammonia. Ammonia in water is toxic and dangerous for fish health. This study aimed to determine the effect of Nitrobacter bacteria on specific growth rate (SGR), survival rate (SR), and feed convertion ratio (FCR) of African catfish (Clarias sp.) in aquaponics systems. The sample used was African catfish with a size of 5-7 cm as many as 720 individuals. The research method used was experimental design in the form of Completely Randomized Design (CRD). This study used 5 types of treatments with 4 repetitions. The control group were treated without Nitrobacter administration and 4 intervention groups were given Nitrobacter 1 ml with a density of 1x108 CFU ml-1. The main parameters observed were SGR, SR and FCR. Whereas, the supporting parameters were water spinach (Ipomoea aquatica) plant growth and water quality conditions in aquaponics systems. The administration of Nitrobacter in aquaponics systems gave a significant effect on the SGR, SR, and FCR of catfish. The administration of Nitrobacter in an aquaponics system can give maximum effect if there are 45 fish stocking densities and 1 ml Nitrobacter with a concentration of 1x108 CFU ml-1.

Effect of microalgae Spirulina spp. as food additive on some biological and blood parameters of common carp Cyprinus carpio L.

Nasreen Muhialddin Abdulrahman; Hawkar Jaafar Hama Ameen; Shamal Rasul Hama; Bakhan Rafiq Hassan; Pola Jalal Nader

Iraqi Journal of Veterinary Sciences, 2019, Volume 33, Issue 1, Pages 27-31
DOI: 10.33899/ijvs.2019.125527.1049

This study was carried out to study the effect of adding different levels of the microalgae Spirulina spp. in fish laboratory of Animal Sciences Department, College of Agricultural Sciences of Sulaimani University, Sulaimani, Iraq. A total of 72 common carp fingerling weight 45±2 gm used to detect the effect of three different levels of the algae Spirulina spp. The control treatment T1 with 0%., T2 with 3 gm /kg diet and T3 with 5 gm Spirulina /kg diet. Each treatment in three replicates in which six fingerlings common carp were stocked in each aquarium. Results indicated no significant differences at PSpirulina) in T3 was higher significantly at PSpirulina was higher significantly at PSpirulina to common carp diets in different levels leads to significant differences in differential WBC counts, T3 with 5 gm Spirulina /kg diet was higher in WBC counts. Lymphocytes were higher in each of control and T3. Monocytes were higher in control, granulocytes in T2 with 3 gm Spirulina /kg diet. Adding of Spirulina affected significantly in cholesterol as compared to the control. Triglyceride was higher in control and T2. T3 with 5 gm Spirulina /kg diet leads to higher and lower significantly in HDL and LDL respectively. T1 and T3 were higher significantly in spleenosomatic index. Inclusion of S. platensis in fish diet as a feed additive or as a partial replacer of the expensive fishmeal imposes significant promotions in fish growth, coloration, reproduction and flesh quality.