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Endogeneous ammonia excretion rate and exogeneous ammonia excretion rate of red sea bream (Pagrus major) were investigated under the combination of four different temperatures regimes (10, 15, 20 and 25℃) and two different densities (5.5 and 11 ㎏ m?³). Ammonia excretion was significantly increased with increasing temperature and density. Endogenous ammonia excretions of red sea bream with lower density under 10, 15, 20 and 25℃ were ranged 88.76~143.26 ㎎ ㎏?¹ d?¹, while that under higher density were ranged 105.24~168.82 ㎎ ㎏?¹ d?¹. The relationship between endogenous ammonia excretion rate and temperature in low density was Y=18.746X+si.s6n 1ºw dehi5) and that in high density was Y=21.3 6X+8ons16n low deh t). Exogenous ammonia excretions of red sea bream with low density under 10, 15, 20 and 25℃ were ranged 343.48~601.74 ㎎ ㎏?¹ d?¹. On other hand, exogenous ammonia excretion rates in high density were ranged 391.92~683.40 ㎎ ㎏?¹ d?¹. Ratio of ammonia excretion to ingested nitrogen of red sea bream with lower density under 10, 15, 20 and 25℃ were ranged 27.92~50.11%, while that in higher density were ranged 31.65~56.89%. The relationship between exogenous ammonia excretion (Y) and temperature (T) in low density was Y=90.68T+244.47 (R²=0.9772) and that in high density was Y=100.66T+290.09 (R²=0.988).

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Abstract
Background of This Study
Materials and Methods
Results and Discussion
References

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UCI(KEPA) : I410-ECN-0101-2010-529-002274725