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Scaling of oxygen consumption of Lake Magadi tilapia, a fish living at 37°C
Author(s) -
Franklin C. E.,
Johnston I. A.,
Crockford T.,
Kamunde C.
Publication year - 1995
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.1095-8649.1995.tb01605.x
Subject(s) - respirometry , biology , oxygen , respiration , allometry , zoology , tilapia , fish <actinopterygii> , metabolic rate , fishery , ecology , anatomy , biochemistry , chemistry , endocrinology , organic chemistry
Rates of oxygen consumption were measured in the geothermal, hot spring fish, Oreochromis alcalicus grahami by stopped flow respirometry. At 37° C, routine oxygen consumption followed the allometric relationship: V o 2 =0.738 M 0.75 , where V o 2 is ml O 2 h −1 and M is body mass (g). This represents a routine metabolic rate for a 10 g fish at 37° C of 0.415 ml O 2 g −1 h −1 (16.4 μmol O 2 g −1 h −1 ). Acutely increasing the temperature from 37 to 42° C significantly elevated the rate of O 2 consumption from 0.739 to 0.970 ml O 2 g −1 h −1 ( Q 10 =l.72). In the field, O. a. grahami was observed to be ‘gulping’ air from the surface of the water especially in hot springs that exceeded 40° C. O. a. grahami may utilize aerial respiration when O 2 requirements are high.