Abstract
Abstract.— The present work investigated the effect of chronic ammonia exposure on energy budget of juvenile soft‐shelled turtle, Pelodiscus sinensis. Turtles (87.14 ± 4.00 g) were exposed to external total ammonia nitrogen (TAN) concentrations of C0 (11.01 mg/L), C1 (46.32 mg/L), C2 (68.71 mg/L), and C3 (97.0 mg/L), respectively, for 97 d at 29.5 C, pH 7.76. The ambient ammonia showed no significant influence on any component of the energy budget such as feed consumption, fecal production, excretion, standard metabolism, and growth. There were also no significant differences in body composition of the turtles among different treatments. Chronic exposure to ambient ammonia as high as 97 mg/L TAN did not affect energy budget of juvenile soft‐shelled turtle. The average energy budget for all turtles can be described as follows: 100 C = 9.3 F + 3.0 U + 74.6 R + 13.1 G, where C, F, U, R, and G represent energy intake, fecal energy, excretory energy loss, metabolism energy, and growth energy, respectively.
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