Yingguang JI,Haiyan LIU,Zhe SONG and Zhencai YANG.Effects of Feeding Time on the Growth Performance and Variation of RNA/DNA Ratio of the Chinese Soft-shelled Turtle, Pelodiscus sinensis[J].Asian Herpetological Research(AHR),2016,7(4):271-277.[doi:10.16373/j.cnki.ahr.150020]
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Effects of Feeding Time on the Growth Performance and Variation of RNA/DNA Ratio of the Chinese Soft-shelled Turtle, Pelodiscus sinensis
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Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]

Issue:
2016 VoI.7 No.4
Page:
271-277
Research Field:
Publishing date:
2016-12-25

Info

Title:
Effects of Feeding Time on the Growth Performance and Variation of RNA/DNA Ratio of the Chinese Soft-shelled Turtle, Pelodiscus sinensis
Author(s):
Yingguang JI1; 2;  Haiyan LIU1;  Zhe SONG1 and Zhencai YANG1*
1 College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei, China
2 Hebei Chemical and Pharmaceutical College, Shijiazhang 050026, Hebei, China
Keywords:
Feeding time;  Growth performance;  Pelodiscus sinensis;  RNA/DNA ratio
PACS:
-
DOI:
10.16373/j.cnki.ahr.150020
Abstract:
The present study was to investigate the effects of feeding time on growth of the Chinese soft-shelled turtle. The experiment was carried out with a photoperiod of 12L (light):12D (dark) with lights on at 06:00 and off at 18:00. Turtles were maintained at a temperature of 32 ± 0.2 °C in tanks throughout the length of the experiment. The turtles in group 1 to group 6 were fed respectively at 00:00, 04:00, 08:00, 12:00, 16:00 and 20:00 with 60 turtles each (Initial body weight 88.27 ± 0.09 g). Acrophases of postprandial RNA/DNA ratio in liver in each group was shown between 5h and 7h after feeding. A positive linear correlation could be seen between specific growth rate (SGR) and RNA/DNA:SGR=1.1586RNA/DNA–0.7097 (r = 0.9328, P = 0.0066). The results indicated that the values at the acrophases of about 6h after feeding might be used as an instantaneous growth index in the Chinese soft-shelled turtle. The turtles in group 1 grew better than group 3, group 4, group 5, group 6, because they ate more, but they ate more and grew slower than group 2, whose feed conversion rate was also higher. Meanwhile, the SGR and feeding rate of turtles fed at 12:00 were the lowest from the six groups (P < 0.05) . Turtles fed in group 1, group 2 and group 6 developed more heavy final body weight (FBW), higher feeding rate and SGR than the other three groups. This probably suggested that turtles fed in scotophase grew better than that fed at photophase in total.

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Last Update: 2016-12-25