Premium
The effect of temperature on routine metabolism in Tilapia rendalli boulenger
Author(s) -
Caulton M. S.
Publication year - 1977
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1977.tb05711.x
Subject(s) - respirometer , biology , tilapia , oxygen , ectotherm , biomass (ecology) , bioenergetics , energy metabolism , metabolic rate , zoology , fish <actinopterygii> , ecology , fishery , biochemistry , anatomy , respiration , endocrinology , chemistry , organic chemistry , mitochondrion
Using a continuous flow respirometer it was shown that young Tilapia rendalli had three distinct phases of oxygen consumption over the temperature range of 17–40° C. In the first phase (17–28° C) the metabolic energy demand followed the normal logarithmic increase with increasing temperature. Between 28 and 37° C the increased oxygen uptake was suppressed and showed a relatively small increase with increasing temperature. This feature was believed to be a significant energy saving function important to the growth of these fish which feed in the warm eulitoral margins of lakes during the day. The final phase shows a return to the original logarithmic increase in oxygen consumption. These results were related to, and compared with, actual changes in biomass at various temperatures and the theoretical and actual biomass changes were found to compare favourably.