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| Influences of Salinity Stress on Energy Metabolism in Blood Clam Tegillarca granosa |
| JI Dewei,CHEN Chen,LI Tingting,LIU Weicheng,ZENG Guoquan,CHAI Xueliang |
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Abstract Influences of salinity on feeding ,metabolic physiology ,carbon budget and energy metabolism were studied in blood clam Tegillarca granosa with shell length of 27—28 mm exposed to a salinity of 11 , 14 .5 ,18 ,21 .5 ,25 and 28 .5 in a recirculating system for 24 hours at water temperature of (26 .4 ± 0 .79)℃ .The results showed that the filtration rate ,ingestion rate ,absorption rate and O∶N were increased at first and then decreased ,and the oxygen consumption rate and ammonia excretion rate decreased at first and then increased with the increasing salinity ,with the extreme value at the salinity from 18 to 21 .5(P<0 .05) ,and without significant differences in oxygen consumption rate ,ammonia excretion rate and O ∶N within the experimental salinity (P>0 .05) .The findings indicated that metabolic energy of the shellfish was primarily provided by fat and carbohydrates ,and that the blood clam had the energy budge equation of 100C=26 .12F+30 .75R+5 .78U+37 .35P at a salinity of 18 ,and of 100C=25 .06F+32 .03R+5 .15U+37 .76P at a salinity of 21 .5 ,which salinity from 18 to 21 .5 is of the optimal salinity range for growth in blood clam .
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Received: 25 May 2016
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