Replacing Artemia salina with bigeye scad (Selar crumenophthalmus) roe for larval rearing of giant freshwater prawn (Macrobrachium rosenbergii, De Man 1879)

River prawn Larvae Post-larvae Fish roe

Authors

  • Patcharee Kaeoprakan
    nongmarine5@gmai.com
    Aquaculture and Aquatic Resources Management (AARM), Department of Food, Agriculture and Bioresources (DFAB), School of Environment, Resources and Development (SERD), Asian Institute of Technology (AIT), Klong Luang, Pathum Thani 12120, Thailand.
  • Ram Chandra Bhujel Aquaculture and Aquatic Resources Management (AARM), Department of Food, Agriculture and Bioresources (DFAB), School of Environment, Resources and Development (SERD), Asian Institute of Technology (AIT), Klong Luang, Pathum Thani 12120, Thailand.
  • Somprasong Natetip Lukkungsetthi Co., Ltd., 82/90 Moo 1, Khlong Prawet, Ban pho District, Chachoengsao Province 24140, Thailand.
October 25, 2025

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Bigeye scad, Selar crumenophthalmus, roe was studied as an alternative to costly Artemia during larval rearing (20 days) of Macrobrachium rosenbergii, followed by nursing (35 days). Four treatments with Artemia replacement at 0, 50, 75, and 100% were compared in 12 round-shaped plastic buckets (30 L), each stocking 2,400 larvae. All the larvae fed with 100% fish roe died after one week. Average survival of larvae fed with 0, 50, and 75% fish roe was 38.5±6.7, 36.5±1.6, and 33.6±0.9%, respectively, which were not significantly different. However, specific growth rate and gains in weight and length were similar in the group fed 50% fish roe compared with the control (0%). Therefore, a 50% replacement is recommended, although polynomial regression suggests that a 30.4% replacement might result in the highest survival rate (46.2%). Further research should be conducted using varying levels of replacement, ranging from 0 to 80%, to determine the economically optimal replacement level more precisely.