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Ecophysiological influence on scaling of aerobic and anaerobic metabolism of pelagic gonatid squids.
Physiol Biochem Zool. 2009 Sep-Oct; 82(5):419-29.PB

Abstract

We examined the oxygen consumption rates and activity levels of respiratory enzymes involved in the aerobic (citrate synthase [CS]) and anaerobic (octopine dehydrogenase [ODH]) metabolism of gonatid squids (Gonatus onyx and Gonatus pyrus) as a function of body size. The energy expenditure rates of gonatids (ranging from 2.51 to 8.79 micromol O(2) g(-1) h(-1) at 5 degrees C) are among the highest in Animalia when mass and temperature are taken into account. They reflect the low efficiency of jet propulsion and the animals' active life strategy as diel vertical migrants in the pelagic environment. Both metabolic rate and aerobic muscle potential (CS activity) were size independent across a size range of four orders of magnitude, which may be a result of their unusual body geometric allometry, extensive cutaneous respiration, and decreased energy-saving opportunities at larger sizes. Anaerobic metabolic potential (ODH activity) revealed a shift from positive scaling in juveniles to negative scaling among larger sizes. Juveniles are found in shallow water, where they are more susceptible to visually cued predators and require quicker size-specific escape responses and higher burst swimming capacities. Conversely, adults have reduced requirements for predator/prey interactions in the light-limited deep sea. Anaerobic metabolic scaling reflects an adaptive response to the changing physical and ecological demands across a depth gradient during this species's ontogenetic vertical migration.

Authors+Show Affiliations

Laboratório Marítimo da Guia, Centro de Oceanografia, Faculdade de Ciências da Universidade de Lisboa, 2750-374 Cascais, Portugal. rrosa@fc.ul.ptNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

19265463

Citation

Rosa, Rui, et al. "Ecophysiological Influence On Scaling of Aerobic and Anaerobic Metabolism of Pelagic Gonatid Squids." Physiological and Biochemical Zoology : PBZ, vol. 82, no. 5, 2009, pp. 419-29.
Rosa R, Trueblood L, Seibel BA. Ecophysiological influence on scaling of aerobic and anaerobic metabolism of pelagic gonatid squids. Physiol Biochem Zool. 2009;82(5):419-29.
Rosa, R., Trueblood, L., & Seibel, B. A. (2009). Ecophysiological influence on scaling of aerobic and anaerobic metabolism of pelagic gonatid squids. Physiological and Biochemical Zoology : PBZ, 82(5), 419-29. https://doi.org/10.1086/591950
Rosa R, Trueblood L, Seibel BA. Ecophysiological Influence On Scaling of Aerobic and Anaerobic Metabolism of Pelagic Gonatid Squids. Physiol Biochem Zool. 2009 Sep-Oct;82(5):419-29. PubMed PMID: 19265463.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ecophysiological influence on scaling of aerobic and anaerobic metabolism of pelagic gonatid squids. AU - Rosa,Rui, AU - Trueblood,Lloyd, AU - Seibel,Brad A, PY - 2009/3/7/entrez PY - 2009/3/7/pubmed PY - 2009/12/16/medline SP - 419 EP - 29 JF - Physiological and biochemical zoology : PBZ JO - Physiol. Biochem. Zool. VL - 82 IS - 5 N2 - We examined the oxygen consumption rates and activity levels of respiratory enzymes involved in the aerobic (citrate synthase [CS]) and anaerobic (octopine dehydrogenase [ODH]) metabolism of gonatid squids (Gonatus onyx and Gonatus pyrus) as a function of body size. The energy expenditure rates of gonatids (ranging from 2.51 to 8.79 micromol O(2) g(-1) h(-1) at 5 degrees C) are among the highest in Animalia when mass and temperature are taken into account. They reflect the low efficiency of jet propulsion and the animals' active life strategy as diel vertical migrants in the pelagic environment. Both metabolic rate and aerobic muscle potential (CS activity) were size independent across a size range of four orders of magnitude, which may be a result of their unusual body geometric allometry, extensive cutaneous respiration, and decreased energy-saving opportunities at larger sizes. Anaerobic metabolic potential (ODH activity) revealed a shift from positive scaling in juveniles to negative scaling among larger sizes. Juveniles are found in shallow water, where they are more susceptible to visually cued predators and require quicker size-specific escape responses and higher burst swimming capacities. Conversely, adults have reduced requirements for predator/prey interactions in the light-limited deep sea. Anaerobic metabolic scaling reflects an adaptive response to the changing physical and ecological demands across a depth gradient during this species's ontogenetic vertical migration. SN - 1537-5293 UR - https://www.unboundmedicine.com/medline/citation/19265463/Ecophysiological_influence_on_scaling_of_aerobic_and_anaerobic_metabolism_of_pelagic_gonatid_squids_ L2 - http://dx.doi.org/10.1086/591950 DB - PRIME DP - Unbound Medicine ER -