Effects of Temperature, Salinity, Stocking Density on Survival Rate and Metamorphosis Time from Megalopa to Early Juvenile of Mitten Crab (Eriocheir sinensis H. Milne Edwards, 1853)

Date Received: 02-07-2025

Date Accepted: 18-09-2025

Date Published: 31-10-2025

##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2025.23.10.05

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Issue: Vol. 23 No. 10 (2025): Tạp chí Khoa học Nông nghiệp Việt Nam

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CHĂN NUÔI – THÚ Y – THỦY SẢN

How to Cite:

Nghia, T., Quy, P., Muu, T., & Van, K. (2025). Effects of Temperature, Salinity, Stocking Density on Survival Rate and Metamorphosis Time from Megalopa to Early Juvenile of Mitten Crab (Eriocheir sinensis H. Milne Edwards, 1853). Vietnam Journal of Agricultural Sciences, 23(10), 1323–1330. https://doi.org/10.31817/tckhnnvn.2025.23.10.05

Effects of Temperature, Salinity, Stocking Density on Survival Rate and Metamorphosis Time from Megalopa to Early Juvenile of Mitten Crab (Eriocheir sinensis H. Milne Edwards, 1853)

Tran Trong Nghia 1 , Phan Minh Quy 2 , Tran The Muu (*) 2 , Kim Van Van 3, 4

  • Tác giả liên hệ: [email protected]
  • 1 Khoa Thủy sản, Học Viện Nông nghiệp Việt Nam
  • 2 Viện Nghiên cứu Nuôi trồng Thủy sản 1
  • 3 Khoa Thủy sản, Học viện Nông nghiệp Việt Nam
  • 4 Khoa Chăn nuôi, Học viện Nông nghiệp Việt Nam

    • Keywords

    Mitten crab, megalopa, temprature, salinity, stocking density, survival rate, metamorphosis time

    Abstract


    The study was aimed to determine the effects of these factors on the survival rate and metamorphosis time from megalopa to early juvenile of mitten crab. Mitten crab larvae, megalopa, were collected from artificial breeding tanks of the Northern National Broodstock Center for Mariculture (under the Research Institute for Aquaculture 1) and arranged into 3 independent experiments: temperature; salinity and stocking density. The temperature experiment consisted of five levels: 18; 20; 22; 24C and the control (about 20-22C). The survival rate tended to increase but the metamorphosis time shortened when the water temperature increased from 18; 20 to 22C, respectively, 22.0; 28.0; 34.1% and 299.8; 237.3; 196.2 hours. Regarding salinity, the experiment was at the levels of 0; 5; 10; 15‰ and control (about 22‰). The results showed that at salinity of 5‰, the survival rate was 36.0%, much higher than other salinities. When the salinity of the nursery water increased, the metamorphosis time was prolonged, respectively 163.5; 172.6; 194.3; 211.5 and 230.2 hours. Experiments with stocking density at levels of 5; 10; 20 and 30 megalopa/liter showed that stocking density exerted great influence on the survival rate and metamorphosis time from megalopa to early juvenile. The survival rate decreased significantly and the metamorphosis time tended to be prolonged when stocking density increased.

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