The Effect of Stocking Density on the Growth of Ocellaris Clownfish (Amphiprion ocellaris Cuvier, 1830) With Recirculation

Abstract

The ornamental fish business is now an economic driver. The ocellaris clownfish (Amphiprion ocellaris Cuvier, 1830) is one of the leading commodities of marine ornamental fish that is in great demand, especially in foreign markets. One obstacle faced by farmers in determining the appropriate density for the ocellaris clownfish rearing stage. This study aimed to evaluate the effect of stocking density on production factors, which included survival rate, and growth rate of ocellaris clownfish. Three hundred fish were used as experimental fish with an average length of 23.00 ± 2.36 mm and a weight of 0.27 ± 0.02 gather study was conducted using 4 treatment tanks with a volume of 120 L with densities of 0.17, 0.37, 0.67, and 0.80 fish/L. Observations showed that the density of 0.37 fish per L (K2) gave the best results with a survival rate of 98.18%. For the SGR parameter, the highest value was 1.14% per day in the K1 treatment. This indicated that the stocking density has a relationship with the factor of production in rearing ocellaris clownfish in the recirculation system.

The toxicity of chlorine dioxide to clownfish and its bactericidal capability to pathogenic strains of vibrio spp.

“…Our findings suggested that the optimal ClO 2 concentration for reducing microorganism density in saltwater with living clownfish is 0.1 ppm and no more than 0.25 ppm, which caused some histological lesions in the gill of A. ocellaris. Although the highest pH recorded in this study was 8.4, slightly above the suggested optimal range for captive A. ocellaris (Domínguez & Botella, 2014;Pietoyo et al, 2020;Soman et al, 2021), careful monitoring of water pH changes after ClO 2 application in a fish tank is still recommended.…”

Xanthophore Distribution of Nemo (Amphiprion ocellaris) Skin Based on various Concentrations of Carotenoid Sources

“…When the temperature of the maintenance media increases, concentration of dissolved oxygen in the maintenance media can be reduced. Low dissolved oxygen concentration can also affect the pH of maintenance media according to Pietoyo et al (2020) waters that tend to be acidic or alkaline can cause fish death. This is due to low oxygen concentrations that makes respiratory activity increase and appetite decreases.…”

“…This is in line with the study of Pratiwi et al (2022) who stated that the optimal temperature of fish rearing media ranges from 25-30 o C. Meanwhile pH of the maintenance media ranges from 7.75 -7.1, consistent with earlier study by Chambel et al (2015), Nemo can live in waters with acidity levels ranging from 6-9. The salinity of the maintenance media is 32 ppt as demonstrated by Pietoyo et al (2020) who stated that the salinity of the maintenance media is still in the optimal range. The dissolved oxygen in the maintenance media was 5.16 mg/L.…”

Evolution, Development and Ecology of Anemonefishes

“…It is also important to note that juveniles can become very aggressive and thus constant fighting may induce high levels of mortality (up to 90%, personal observations). To avoid this, it is recommended to raise juveniles at densities between 37 and 300 fish per 100 L to have survival rates exceeding 80% Pietoyo et al 2020). From our own experience, it is also advised to avoid shelter in the tank, to prevent the young fish from settling and establishing a distinct territory .…”