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EFFECTS OF TEMPERATURE AND SALINITY ON OXYGEN CONSUMPTION AND AMMONIA EXCRETION OF MUDDY SHELLFISH TEGILLARCA GRANOSA
Author(s): 
Pages: 1333-1338
Year: Issue:  6
Journal: Oceanologia et Limnologia Sinica

Keyword:  Tegillarca granosawater temperaturesalinityoxygen consumptionammonia excretion;
Abstract: We determined the effects of water temperature and salinity on oxygen consumption and ammonia excretion of Tegillarca granosa in an experiment in still water and sealed respiratory bottle. T. granosa was exposed to six temperatures(13, 18, 23, 28, 31, 34°C) and four salinities(18, 23, 28, 33). The results show that the oxygen consumption rate varied from 0.63 to 4.47mg/(g·h) and the ammonia excretion rate from 123.11 to 955.68μg/(g·h) against the temperatures. Both oxygen consumption rate and ammonia excretion rate were correlated significantly to temperature variation(P<0.01) and could be described by logarithmic equations. To salinity, however, the ammonia excretion changed irregularly, while significantly with oxygen consumption at 18°C only. The interactions of oxygen consumption and ammonia excretion against water temperature and salinity in our designed ranges were found obvious. The ratio of O: N varied from 4.50 to 13.07, under which normal metabolism could be maintained in T. granosa.
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