Scaling of standard metabolic rate in estuarine crocodiles Crocodylus porosus.
J Comp Physiol B
; 183(4): 491-500, 2013 May.
Article
en En
| MEDLINE
| ID: mdl-23233168
ABSTRACT
Standard metabolic rate (SMR, ml O2 min(-1)) of captive Crocodylus porosus at 30 °C scales with body mass (kg) according to the equation, SMR = 1.01 M(0.829), in animals ranging in body mass of 3.3 orders of magnitude (0.19-389 kg). The exponent is significantly higher than 0.75, so does not conform to quarter-power scaling theory, but rather is likely an emergent property with no single explanation. SMR at 1 kg body mass is similar to the literature for C. porosus and for alligators. The high exponent is not related to feeding, growth, or obesity of captive animals. The log-transformed data appear slightly curved, mainly because SMR is somewhat low in many of the largest animals (291-389 kg). A 3-parameter model is scarcely different from the linear one, but reveals a declining exponent between 0.862 and 0.798. A non-linear model on arithmetic axes overestimates SMR in 70% of the smallest animals and does not satisfactorily represent the data.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Metabolismo Basal
/
Caimanes y Cocodrilos
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
Idioma:
En
Revista:
J Comp Physiol B
Asunto de la revista:
BIOQUIMICA
/
FISIOLOGIA
/
METABOLISMO
Año:
2013
Tipo del documento:
Article
País de afiliación:
Australia