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| Observation on development of Macrobrachium rosenbergiiembryos and influence of temperature on embryonic development |
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| Abstract: |
| The morphological changes were observed and the effect of temperature on embryonic development
of Macrobrachium rosenbergii was studied. The results showed that the embryonic development could be divided
into eight stages，including fertilized egg stage，cleavage stage，blastula stage，gastrula stage，egg nauplius stage，
egg metanauplius stage，protozoea stage and zoea stage. Within a certain temperature range，speed of embryonic
development decreased with increase of temperature with optimum temperature around 30℃. At 30℃，the aperture ratio
and hatching rate of larvae were the highest，and the cost was less. The regression equation of developmental temperature
and development time was described as y=181.127-9.921 x+0.149 x2. |
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