Life table characteristics of three species of fairy shrimps from Thailand, Streptocephalus sirindhornae, S. siamensis, and Branchinella thailandensis are reported, based on laboratory cultures at 24-26°C. Comparative data on their growth and fecundity revealed that B. thailandensis had the largest size (male 26.2, female 27.8 mm) and the highest hatchability 87.67%. The shortest hatching time was found in B. thailandensis, it hatched within 3 days, while the other two species hatched within four days. Branchinella thailandensis showed more rapid growth than the other two species, and it reached maturity within 6.5 days. In contrast, S. sirindhornae had the highest fecundity, producing a mean of 35.3 broods and 17,865 eggs per individual female over its life time, whereas the other two species produced less than 8000 eggs. Life span was equal for both males and females in all three fairy shrimp species (P > 0.05). In this study, the fecundity data indicated that the number of eggs per brood recorded in the three species showed a positive correlation with the body length and age of females. The result indicated that the Thai fairy shrimps show several biological attributes making them suitable for aquaculture and other commercial purposes; B. thailandensis shows rapid growth and high hatching percentage which is suitable for mass production, while S. sirindhornae has high fecundity which is appropriate for the commercial production of eggs.
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Vol. 31 • No. 4