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<p>This study explored how fry density and transportation duration affect mortality and water quality during the transportation of rohu (<i>Labeo rohita</i>) fry. Three treatment groups were tested with fry densities of 200, 250, and 300 fry/bag (T<sub>1</sub>, T<sub>2</sub> and T<sub>3</sub>, respectively). Rohu fry were transported in sealed plastic bags (76&#xa0;cm × 50&#xa0;cm) for 24&#xa0;h, with regular monitoring of water quality and fish health at every 4&#xa0;h intervals. The results showed a significant positive relationship between fry mortality and conductivity, total dissolved solids (TDS), and salinity, whereas dissolved oxygen (DO) and pH were negatively correlated. Higher fry densities led to increased conductivity and TDS but decreased the DO and pH levels. After 24&#xa0;h, the lowest mortality rate (5.63%) was observed in T<sub>1</sub>. The optimal transport condition was identified at T<sub>2</sub>, where up to 20&#xa0;h of transportation resulted in mortality rates under 5%. However, the highest density (T<sub>3</sub>) showed favorable outcomes at 8&#xa0;h, with a DO level of 3.10 ± 0.10&#xa0;mg/L when the mortality rate was less than 4%. On the basis of these findings, this research recommends 24&#xa0;h of transport for 200 fry/bag, 20&#xa0;h for 250 fry/bag, 8&#xa0;h for 300 fry/bag.</p>

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Investigation of transportation carrying capacity of Rohu (Labeo Rohita) fry: insights into water quality parameters

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月25日

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  • Roni Das,
  • M. Shahab Uddin,
  • Debasish Pandit,
  • Iftekhar Ahmed Fagun,
  • Md. Abu Kawsar,
  • Nasima Begum,
  • Farjana Khanam Chadnee,
  • Bishwajit Sarker,
  • Mrityunjoy Kunda,
  • Md. Tariqul Alam

摘要

This study explored how fry density and transportation duration affect mortality and water quality during the transportation of rohu (Labeo rohita) fry. Three treatment groups were tested with fry densities of 200, 250, and 300 fry/bag (T1, T2 and T3, respectively). Rohu fry were transported in sealed plastic bags (76 cm × 50 cm) for 24 h, with regular monitoring of water quality and fish health at every 4 h intervals. The results showed a significant positive relationship between fry mortality and conductivity, total dissolved solids (TDS), and salinity, whereas dissolved oxygen (DO) and pH were negatively correlated. Higher fry densities led to increased conductivity and TDS but decreased the DO and pH levels. After 24 h, the lowest mortality rate (5.63%) was observed in T1. The optimal transport condition was identified at T2, where up to 20 h of transportation resulted in mortality rates under 5%. However, the highest density (T3) showed favorable outcomes at 8 h, with a DO level of 3.10 ± 0.10 mg/L when the mortality rate was less than 4%. On the basis of these findings, this research recommends 24 h of transport for 200 fry/bag, 20 h for 250 fry/bag, 8 h for 300 fry/bag.