Optimal egg viability storage conditions in two commercial fairy shrimps (Crustacea: Branchiopoda: Anostraca) from Thailand |
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| Authors: | Wipavee Thaimuangphol La‐orsri Sanoamuang |
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| Institution: | 1. Applied Taxonomic Research Center, Khon Kaen University, Khon Kaen, Thailand;2. Faculty of Technology, Mahasarakham University, Maha Sarakham, Thailand;3. International College, Khon Kaen University, Khon Kaen, Thailand |
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| Abstract: | Optimal egg viability storage conditions for two commercial fairy shrimps, Branchinella thailandensis and Streptocephalus sirindhornae, were investigated. Eggs for each treatment were kept under eight different conditions at four different temperatures for 24 months. Every 2 months, representative eggs were hatched to evaluate hatching percentages. Low temperature and oxygen, darkness and dry conditions significantly influenced egg hatchability of both species. Undehydrated eggs hatchability in all conditions ranged from 0 to 10% in S. sirindhornae and 0 to 20% in B. thailandensis. Hatching percentages of B. thailandensis were higher than those of S. sirindhornae. Hatchability under all experimental regimes continuously decreased over time, except for dry eggs stored at ?18°C in dark‐anoxic conditions. Hatchability was markedly delayed in both species over time. We demonstrate that both species’ eggs can be stored at ?18°C at least for 24 months with high hatchability in B. thailandensis (80%) and S. sirindhornae (60%) under dry, dark, anoxic conditions. |
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| Keywords: |
Branchinella thailandensis
hatchability storage periods
Streptocephalus sirindhornae
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