Effect of Stocking Density on the Performance of Glass Eels (Anguilla mamorata) in an Indoor Culture System in Da Nang, Vietnam

Date Received: Nov 23, 2024

Date Accepted: Jun 26, 2025

Date Published: Jun 28, 2025

DOI: https://doi.org/10.31817/vjas.2025.8.2.

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Issue: Vol. 8 No. 2 (2025): Vietnam Journal of Agricultural Sciences

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ANIMAL SCIENCE – VETERINARY MEDICINE – AQUACULTURE

How to Cite:

Thong, N. V., Hoa, N., Quoc, N., Ha, T., Ban, V., Duc, N., … Cong, T. (2025). Effect of Stocking Density on the Performance of Glass Eels (Anguilla mamorata) in an Indoor Culture System in Da Nang, Vietnam. Vietnam Journal of Agricultural Sciences, 8(2), 2474–2482. https://doi.org/10.31817/vjas.2025.8.2.

Effect of Stocking Density on the Performance of Glass Eels (Anguilla mamorata) in an Indoor Culture System in Da Nang, Vietnam

Nguyen Van Thong (*) 1, 2 , Nguyen Phu Hoa 3 , Nguyen Bao Quoc 1, 4 , Tran Thuy Ha 5 , Vo Van Ban 5 , Nguyen Dinh Duc 5 , Nguyen Ngoc Tai 2   , Thanh Nguyen Cong 2

  • Corresponding author: [email protected]
  • 1 Faculty of Biological Sciences, Nong Lam University, Ho Chi Minh City 71300, Vietnam
  • 2 Technical Department, Asian Organic Agricultural Research and Development Institute, Ho Chi Minh 73100, Vietnam
  • 3 Faculty of Fishery, Nong Lam University, Ho Chi Minh city 71300, Vietnam
  • 4 Research Institute for Biotechnology and Environment, Nong Lam University, Ho Chi Minh City 71300, Vietnam
  • 5 An Dinh farm company Ltd, Da Nang city 50007, Viet Nam

    • Keywords

    Indoor culture, glass eel, growth performance, giant mottled eel, parameters, survival rate and weight gain

    Abstract


    The giant mottled eel (Anguilla marmorata) is a commercially valuable species that is commonly farmed in Vietnam. The survival rate of glass eels transitioning to the fingerling stage remains a challenge due to high mortality during the nursery phase. A 90-day experiment was conducted in triplicate to evaluate the effects of different stocking densities (200, 225, and 250 fish m-3) in an indoor system at a farm in Da Nang. Additionally, the eels were fed imported formulated feed from Taiwan. Throughout the experiment, water quality parameters were monitored: the water temperature averaged 27.96 ± 1.55°C, pH was 7.85 ± 0.18, DO was 6.29 ± 0.27 mg L-1, NH₃ was 0.22 ± 0.11 mg L-1, and NO₂⁻ was 0.06 ± 0.07 mg L-1. The survival rate was 61.36 ± 10.51% (ranging from 49.91% to 76.99%), and weight gain was 1.47 ± 0.05 g fish-1. Average survival rates (SR%) were recorded at 64.46 ± 9.97%. Overall, these results highlight that, for the nursery rearing of Anguilla marmorata using commercial feed, the optimal stocking density is 200 fish m-³.

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