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Effect of pH on Hatching Rate and Tadpole Development of Rana dybowskii

Wei GongQing

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Abstract

In order to investigate the effect of pH on egg hatching and tadpole development of Rana dybowskii under the house temperature of 21-23 ℃ and by the means of one-factor experiment,hatching rate of eggs,live body weight of tadpoles,metamorphosis rate and the body weight of newborn tadpole were studied.The results showed that the proper pH for egg hatching was from 4 to 11 and pH from 7-9 caused higher hatching rates than the others.The survival rates of 47.95%,48.98%,5.65% and 43.64% were obtained in testing groups of pH of 6,7,8 and 9 respectively.In the testing groups of pH of 5.5,6.5 and 7.5,the metamorphosis rates were obtained 94.00%,93.00%and 82.00% respectively,and the body weight of young frog after metamorphosis were(267.33±46.97)mg,(278.67±37.67)mg,(260.67±35.52)mg.

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What this paper is about

In order to investigate the effect of pH on egg hatching and tadpole development of Rana dybowskii under the house temperature of 21-23 ℃ and by the means of one-factor experiment,hatching rate of eggs,live body weight of tadpoles,metamorphosis rate and the body weight of newborn tadpole were studied.The results showed that the proper pH for egg hatching was from 4 to 11 and pH from 7-9 caused higher hatching rates than the others.The survival rates of 47.95%,48.98%,5.65% and 43.64% were obtained in testing groups of pH of 6,7,8 and 9 respectively.In the testing groups of pH of 5.5,6.5 and 7.5,the metamorphosis rates were obtained 94.00%,93.00%and 82.00% respectively,and the body weight of young frog after metamorphosis were(267.33±46.97)mg,(278.67±37.67)mg,(260.67±35.52)mg.

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Available abstract

In order to investigate the effect of pH on egg hatching and tadpole development of Rana dybowskii under the house temperature of 21-23 ℃ and by the means of one-factor experiment,hatching rate of eggs,live body weight of tadpoles,metamorphosis rate and the body weight of newborn tadpole were studied.The results showed that the proper pH for egg hatching was from 4 to 11 and pH from 7-9 caused higher hatching rates than the others.The survival rates of 47.95%,48.98%,5.65% and 43.64% were obtained in testing groups of pH of 6,7,8 and 9 respectively.In the testing groups of pH of 5.5,6.5 and 7.5,the metamorphosis rates were obtained 94.00%,93.00%and 82.00% respectively,and the body weight of young frog after metamorphosis were(267.33±46.97)mg,(278.67±37.67)mg,(260.67±35.52)mg.

Key concepts: Hatching, Metamorphosis, Tadpole (physics), Biology, Larva, Rana, Animal science, Body weight

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