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<p>In order to boost productivity based on mutual gain for the co-cultured species and enhanced ecosystem health, integrated multi-trophic aquaculture (IMTA) combines species from various trophic or nutritional levels in a single system. In Bangladesh’s coastal regions, edible oysters, <i>Crassostrea belcheri</i>, are widely available. Because it is a filter-feeder, it can be employed as an extractive species in IMTA to remove organic materials. An experimental trial was carried out to gauge the impact of varying <i>C. belcheri</i> stocking densities on the performance, i.e., growth, feed utilization, and economic returns of seabass (<i>Lates calcarifer</i>) and sea lettuce (<i>Ulva lactuca</i>) and environmental remediation in an IMTA system. Seabass (200.51 ± 0.05&#xa0;g) were placed in 750-L fiber-reinforced plastic (FRP) circular fish tanks (FT) with 1.5 (T<sub>1</sub>) and 2 (T<sub>2</sub>) kg/m<sup>3</sup> of oyster and seaweed (500.36 ± 0.02&#xa0;g) in hydroponic tanks (HT), respectively. The same quantity of seabass and seaweed without oysters was stocked in the control tanks. There were three duplicate tanks for each of the two treatments and the control. The results showed that treatment T<sub>2</sub> yielded the highest final weights for both seaweed (4245.12 ± 9.24&#xa0;g) and seabass (527.19 ± 2.31&#xa0;g), which were significantly greater (<i>p</i> &lt; 0.05) than those recorded in the control group (2452.12 ± 7.12&#xa0;g for seaweed and 442.33 ± 1.89&#xa0;g for seabass). Seabass and oyster survival did not differ; however, T<sub>2</sub> had the highest rates of both. According to this experiment, when stocked at a density of 2&#xa0;kg&#xa0;m<sup>−3</sup>, the oyster <i>C. belcheri</i> can function as an efficient extractive species in the IMTA system. As a result, treatment T<sub>2</sub> IMTA was more effective and had a positive environmental bioremediation impact.</p>

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Evaluation of the production performance of edible oyster (Crassotrea belcheri) and efficacy as extractive species at varied densities in land-based integrated multi-trophic aquaculture (IMTA) system in Bangladesh

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Md. Rayhan Hossain,
  • Abu Bakker Siddique Khan,
  • Shafiqur Rahman,
  • Mousumi Akhter,
  • Mritunjoy Paul,
  • Ehsanul Karim,
  • Anuradha Bhadra

摘要

In order to boost productivity based on mutual gain for the co-cultured species and enhanced ecosystem health, integrated multi-trophic aquaculture (IMTA) combines species from various trophic or nutritional levels in a single system. In Bangladesh’s coastal regions, edible oysters, Crassostrea belcheri, are widely available. Because it is a filter-feeder, it can be employed as an extractive species in IMTA to remove organic materials. An experimental trial was carried out to gauge the impact of varying C. belcheri stocking densities on the performance, i.e., growth, feed utilization, and economic returns of seabass (Lates calcarifer) and sea lettuce (Ulva lactuca) and environmental remediation in an IMTA system. Seabass (200.51 ± 0.05 g) were placed in 750-L fiber-reinforced plastic (FRP) circular fish tanks (FT) with 1.5 (T1) and 2 (T2) kg/m3 of oyster and seaweed (500.36 ± 0.02 g) in hydroponic tanks (HT), respectively. The same quantity of seabass and seaweed without oysters was stocked in the control tanks. There were three duplicate tanks for each of the two treatments and the control. The results showed that treatment T2 yielded the highest final weights for both seaweed (4245.12 ± 9.24 g) and seabass (527.19 ± 2.31 g), which were significantly greater (p < 0.05) than those recorded in the control group (2452.12 ± 7.12 g for seaweed and 442.33 ± 1.89 g for seabass). Seabass and oyster survival did not differ; however, T2 had the highest rates of both. According to this experiment, when stocked at a density of 2 kg m−3, the oyster C. belcheri can function as an efficient extractive species in the IMTA system. As a result, treatment T2 IMTA was more effective and had a positive environmental bioremediation impact.