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Effect of body mass and activity on the metabolic rate and ammonia-N excretion of the spiny lobster Sagmariasus verreauxi during ontogeny

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Jensen, MA and Fitzgibbon, QP and Carter, CG and Adams, LR (2013) Effect of body mass and activity on the metabolic rate and ammonia-N excretion of the spiny lobster Sagmariasus verreauxi during ontogeny. Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 166. pp. 191-198. ISSN 1095-6433

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Abstract

Intraspecific analyses of the relationship between metabolic rate and mass have rarely been considered during
complete ontogeny. Spiny lobsters are fascinating candidates to examine metabolic changes during ontogeny
because their life cycle includes an extended planktonic, nektonic, and benthic life stages. The effect
of body mass on metabolic rates, aerobic scope, and ammonia-N excretion of Sagmariasus verreauxi juveniles
were examined to determine energetic demands through juvenile development. Mass-independent routine
oxygen consumption increased allometrically during juvenile development with a mass scaling exponent
of 0.83. The mass scaling exponent of active metabolism (0.81) was reduced compared to standard metabolism
(0.91) of juvenile lobsters. The aerobic scope of juvenile lobsters decreased with larger body mass. To
examine if the mass scaling exponent varies with ontogeny, we compared our data with previous measurements
made with larvae of the same species. Comparison between mass scaling exponents showed they were
higher for phyllosoma (0.97) compared to juvenile (0.83) development. Higher scaling exponents for
phyllosoma may be attributed to increased growth rates of phyllosoma compared to juveniles, which increase
oxygen consumption due to the higher energy cost of growth. The mass scaling exponent for complete
ontogeny (0.91) of S. verreauxi was larger than the commonly cited 0.67 (1/3) and 0.75 (3/4) mass scaling
exponents, indicating that species-specific differences can be a large factor affecting allometric relationships
of animals.

Item Type: Article
Keywords: Energy utilization Mass scaling Oxygen consumption rate Spiny lobster
Journal or Publication Title: Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology
Page Range: pp. 191-198
ISSN: 1095-6433
Identification Number - DOI: 10.1016/j.cbpa.2013.06.003
Additional Information:

Copyright 2013 Elsevier

Date Deposited: 25 Nov 2013 04:49
Last Modified: 18 Nov 2014 04:56
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