Effects of salinity and body mass on oxygen consumption and ammonia excretion of mudskipper Boleophthalmus pectinirostris  

作　　者：曹伏君 王辉 

机构地区：[1]Fisheries College of Guangdong Ocean University

出　　处：《Chinese Journal of Oceanology and Limnology》2015年第1期92-98,共7页中国海洋湖沼学报（英文版）

基　　金：Supported by the Natural Science Foundation of Guangdong Province(No.8152408801000015)

摘　　要：We evaluated the effects of salinity and body mass on the oxygen consumption rate and ammonia excretion rate of mudskipper Boleophthalmus pectinirostris under laboratory conditions. Salinity and body mass had highly significant effects on the oxygen consumption rate （Ro） and ammonia excretion rate （RN） （P〈0.01）. The interactive effects between salinity and body mass on Ro and RN were insignificant （P〉0.05） and highly significant （P〈0.01）, respectively. Ro and RN of B. pectinirostris decreased significantly as the individual body mass increased. The relationship between Ro and body mass was represented by Ro=aWb （R^2=0.956, P〈0.01）. The relationship between RN and the body mass ofB. pectinirostris was represented by RN-cW^at （R^2=0.966, P〈0.01）. The Ro/RN （O：N） ratios increased significantly as the salinity increased from 12 to 27, but decreased as salinity increased from 27 to 32. The atomic O：N ratios were significantly higher at 27 than at other salinity levels. The average O：N ratio was 25.25. Lipid and carbohydrate were the primary energy sources and protein was the secondary energy significantly higher at 27 than at other salinity levels B, pectinirostris is 27. source within the salinity range 12 32. Ro andRN were Our results suggest that the optimum salinity level for B. pectinirostris is 27.We evaluated the effects of salinity andbody mass on the oxygen consumption rate and ammonia excretion rate of mudskipper Boleophthalmus pectinirostris under laboratory conditions.Salinity and body mass had highly significant effects on the oxygen consumption rate(R_O) and ammonia excretion rate(R_N)(P<0.01).The interactive effects between salinity and body mass onR_O and R_N were insignificant(P>0.05)and highly significant(P<0.01),respectively.R_O and R_N of B.pectinirostris decreased significantly as the individual body mass increased.The relationship between R_O and body mass was represented by R_O=aW^b(R^2=0.956,P<0.01).The relationship between R_N and the body mass of B.pectinirostris was represented by R_N=cW^d(R^2=0.966,P<0.01).The R_O/R_N(O:N) ratios increased significantly as the salinity increased from 12 to 27,but decreased as salinity increased from 27 to 32.The atomic O:N ratios were significantly higher at27 than at other salinity levels.The average O:N ratio was 25.25.Lipid and carbohydrate were the primary energy sources and protein was the secondary energy source within the salinity range 12-32.R_O and R_N were significantly higher at 27 than at other salinity levels.Our results suggest that the optimum salinity level for B.pectinirostris is 27.

关 键 词：Boleophthalmus pectinirostris oxygen consumption ammonia excretion SALINITY body mass 

分 类 号：S917.4[农业科学—水产科学]