Abstract:
Two experiments on the effects of three different temperatures on hatching rate and
embryonic development of freshwater prawn Macrobrachium rosenbergii, were carried
out. In the first experiment, eggs were incubated from fertilization to hatching at
different experimental temperatures (ambient, 29
°
C and 33
°
C) to determine the effects
of temperature on the hatching rate of bright brown eggs. Each treatment has triplicates
which consist of incubation tanks with I 00 pieces eggs in it. The study was carried out
as soon as the eggs had changed from yellow to brown in colour prior to eggs hatching.
The second experiment was a study on the embryonic development. The time from
fertilization to hatching decreased with increasing temperature. Days of hatching were
decreased in treatment 33
°
C.
