Begum, B.D., G. Dharani & K. Altaff. (2012). Effect of Temperature on the Egg Production and Hatching Success of Sinodiaptomus (Rhinediaptomus) Indicus (Calanoida: Copepoda). African Journal of Basic & Applied Sciences. 4 (6): 216-220.

423216

10.5829/idosi.ajbas.2012.4.6.1936 [view]

Begum, B.D., G. Dharani & K. Altaff

2012

4 (6): 216-220.

Publication

Available for editors   [request]

Effect of temperature on the egg production and hatching success were investigated in the laboratory reared Sinodiaptomus (Rhinediaptomus) indicus at 26, 28, 30 and 32°C under standard feeding conditions. The percentage of ovisac producing females increased as the temperature decreased. Similarly the metasome volume decreased as the temperature increases. The ovisac volume decreased and also observed to contain less numbers of eggs as the temperature increased among the four temperatures tested except for a slight increment in the second clutches in the 26°C temperature. Interestingly the embryonic development rate and hatching success was high in higher temperature, however the female ceased to produce third successive clutches of eggs in 30°C and 32°C. The results of the present study on S. (R). indicus indicates that the optimum temperature for maximum numbers of egg production were in between 26°C and 28°C.

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