Mass Seed Production Technology of Green Frog, Rana hexadactyla Lesson by Captive Breeding

摘要

In order to increase the population of green frog ( Rana hexadactyla ) two types of experiment was conducted. The first experiment was designed to expose the frogs in artificial raining system. In the second experiment was conducted to induce the breeding activity by means of pituitary extract. The animals kept in artificial raining system took 26 h for egg deposition. Where as the animals injected with pituitary extract shows only 6.66 h. Fecundity was less (6,600) in animals kept in artificial raining system and it was comparatively high (7,500) in pituitary extract injected animals. Hatching rate, tadpole and frog let survival was much higher in animals exposed to artificial raining system. These were less in the animals injected with pituitary extract. Total rearing periods (6.4 weeks) were less in the animals injected with pituitary extract and it is higher (7.3 weeks) in the animals exposed to artificial raining system. Though the artificial raining system is ideal system for seed production the technology need to be standardized. Once it is standardized it can be very well utilized for the production of seeds in controlled conditions.