[Effect of salinity and body weight on the oxygen consumption of Oreochromis niloticus x O. mossambicus].
The effects of salinity and body weight on oxygen consumption of Taiwan red tilapia (Oreochromis niloticus x O. mossambicus) were studied. The fish was divided into three groups by their body weight: 1.57-4.87 g (G1), 7.07-18.23 g (G2) and 31.50-52.41 g (G3). The results showed that oxygen consumption at different salinities was significantly different (P < 0.01). The rates of oxygen consumption in G1 and G2 were highest, with 0.41 mg O2.g-1.h-1 for G1, and 0.34 mg O2.g-1.h-1 for G2 respectively at salinity 7@1000; while G3 had highest level with 0.30 mg O2.g-1.h-1 at 35@1000. The lowest oxygen consumption level appeared at different salinities with the different body weight. The lowest level in G1, 0.27 mg O2.g-1.h-1, appeared at salinity 14@1000. G2 and G3 had lowest oxygen consumption level at 21@1000, with 0.22 mg O2.g-1.h-1 and 0.13 mg O2.g-1.h-1 respectively. ANOV showed that oxygen consumption was significantly affected by the interaction of salinity and body weight.
Lei
Sijia
S
Department of Biological Applied Engineering, Shenzhen Polytechnic College, Shenzhen 518055. leisijia@yahoo.com
D000818:Animals; D001835:Body Weight; D023681:Cichlids / Q000378:metabolism*; D010101:Oxygen Consumption / Q000187:drug effects*; D012965:Sodium Chloride / Q000494:pharmacology*; D017210:Tilapia / Q000378:metabolism*
D012965:Sodium Chloride