The Effect of Stocking Density on Growth Performance and Water Quality of the Silver rasbora (Rasbora argyrotaenia) Fry Reared in Plastic-lined Pond

Azhar Et Al., Muhammad Hanif

doi:10.21608/ejabf.2022.267444

The Effect of Stocking Density on Growth Performance and Water Quality of the Silver rasbora (Rasbora argyrotaenia) Fry Reared in Plastic-lined Pond

Document Type : Original Article

Author

Muhammad Hanif Azhar et al.

10.21608/ejabf.2022.267444

Abstract

Silver rasbora is one of the local fish species in Indonesia that gains a high public demand. To meet the increasing market demand, it is necessary to implement an optimal silver rasbora rearing system. The objective of the study was to determine the best stocking density for the growth and water quality of silver rasbora (Rasbora argyrotaenia) fry reared in plastic-lined ponds. The fries utilized had a mean initial body length of 1.85 ± 0.5 cm and a body weight of 0.22 ± 0.05 g. The experiment lasted for 40 days and was carried out in a 500 L plastic-lined pond, with dimensions of 1 x 1 x 1 m, and five treatments were evaluated (100, 150, 200, 250, and 300 fish m^-2). The feed used was commercial floating feed with 39% protein content, and feeding was conducted three times a day (08.00 AM, 12.00 PM, and 16.00 PM) on an ad satiation basis. According to the results, the stocking density showed a significant effect on body weight, final biomass, and feed conversion ratio (FCR) in all treatments. T1 resulted in the highest body weight with a value of 0.71±0.02 g, and the lowest FCR with a value of 0.90±0.01. While T5 resulted in the highest final biomass with a value of 102.81±5.62 g. The pH concentration was the only parameter that showed a significantly different value, with the lowest value in T5 (7.02±0.0). The best water quality parameter in T5 showed values of 27.03±0.1^oC (temperature), 7.02±0.03 (pH), 6.79±0.21 mgL^-1(DO), 2.81±0.89 mgL^-1 (nitrate), 0.18±0.02 mgL^-1 (nitrite), and 0.05±0.01 mgL^-1 (TAN). A stocking density of 300 fish showed suitable conditions for rearing silver rasbora fries in the plastic-lined pond.

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