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Oxygen Consumption and Ammonia Excretion in Cultured Soft-Shelled Turtle, Pelodiscus sinensis Exposed Vibration Stress  

Lee, Jeong-Yeol (School of Marine Life Science, Kunsan National University)
Sung, Young-Sik (School of Marine Life Science, Kunsan National University)
Hur, Jun-Wook (School of Marine Life Science, Kunsan National University)
Publication Information
Journal of Aquaculture / v.20, no.1, 2007 , pp. 60-64 More about this Journal
Abstract
We examined the effects of the vibration stress on oxygen consumption and ammonia excretion of cultured soft-shelled turtle, Pelodiscus sinensis. For the stressed group vibration of $45{\sim}78\;dB$ (V) from electric vibrator was turned on for 15 min with 2-h intervals during daytime hours ($08:00{\sim}18:00$) for 28 days. Two different sizes of soft-shelled turtle, large (carapace length: $12{\sim}16\;cm$, body weight: $300{\sim}600\;g$, large size turtle: LST) and middle ($16{\sim}20\;cm,\;700{\sim}1,000\;g$, middle size turtle: MST) were used. The oxygen consumption of LST the beginning of the experiment (1 day) was 124.30 mg $O_2/kg/hr$, and after 7, 14, 21 and 28 days of stress decreased by 47.2, 71.6, 79.1 and 86.0%, respectively. In MST, oxygen consumption of beginning day was 66.04 mg $O_2/kg/hr$, and after 28 days of stress decreased by 76.5%. Ammonia nitrogen excretion showed a similar pattern to that of oxygen consumption. Ammonia nitrogen excretion of beginning of the experiment was 0.537 mg N/kg/hr, and after 28 days of stress decreased by 75.4% for LST, and by 74.3% for the middle ones. From in this study it was showed that the physiological activity was reduced by 50% following 8.4 days of vibration stress for LST, and 15.5 days for MST.
Keywords
Soft-shelled turtle; Pelodiscus sinensis; Vibration Stress; Oxygen consumption; Ammonia Excretion;
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