The routine metabolic rate of mulloway ( Argyrosomus japonicus: Sciaenidae) and yellowtail kingfish ( Seriola lalandi: Carangidae) acclimated to six different temperatures
This study compared the mass-specific routine metabolic rate (RMR) of similar sized mulloway ( Argyrosomus japonicus), a sedentary species, and yellowtail kingfish ( Seriola lalandi), a highly active species, acclimated at one of several temperatures ranging from 10–35 °C. Respirometry was carried o...
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Published in | Comparative biochemistry and physiology. Part A, Molecular & integrative physiology Vol. 152; no. 4; pp. 586 - 592 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
United States
Elsevier Inc
01.04.2009
|
Subjects | |
Online Access | Get full text |
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Summary: | This study compared the mass-specific routine metabolic rate (RMR) of similar sized mulloway (
Argyrosomus japonicus), a sedentary species, and yellowtail kingfish (
Seriola lalandi), a highly active species, acclimated at one of several temperatures ranging from 10–35 °C. Respirometry was carried out in an open-top static system and RMR corrected for seawater–atmosphere O
2 exchange using mass-balance equations. For both species RMR increased linearly with increasing temperature (
T). RMR for mulloway was 5.78
T
−
29.0 mg O
2 kg
−
0.8
h
−
1
and for yellowtail kingfish was 12.11
T
−
39.40 mg O
2 kg
−
0.8
h
−
1
. The factorial difference in RMR between mulloway and yellowtail kingfish ranged from 2.8 to 2.2 depending on temperature. The energetic cost of routine activity can be described as a function of temperature for mulloway as 1.93
T
−
9.68 kJ kg
−
0.8
day
−
1
and for yellowtail kingfish as 4.04
T
−
13.14 kJ kg
−
0.8
day
−
1
. Over the full range of temperatures tested
Q
10 values were approximately 2 for both species while
Q
10 responses at each temperature increment varied considerably with mulloway and yellowtail kingfish displaying thermosensitivities indicative of each species respective niche habitat. RMR for mulloway was least thermally dependent at 28.5 °C and for yellowtail kingfish at 22.8 °C. Activation energies (
E
a) calculated from Arrhenius plots were not significantly different between mulloway (47.6 kJ mol
−
1
) and yellowtail kingfish (44.1 kJ mol
−
1
). |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1095-6433 1531-4332 |
DOI: | 10.1016/j.cbpa.2009.01.008 |