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Metabolic rates in an anadromous clupeid, the American shad (Alosa sapidissima)

Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology

By:
, , ,
DOI: 10.1007/s003600050223

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Abstract

To assess the energetics of migration in an anadromous fish, adult American shad (Alosa sapidissima) were swum in a large respirometer at a range of speeds (1.0-2.3 body lengths (BL) s-1, 13-24 ??C). Metabolic rate (M(O2)) was logarithmically related to swimming speed (Bl s-1; r2 = 0.41, slope = 0.23 ?? 0.037) and tailbeat frequency (beats x min-1; r2 = 0.52, slope = 0.003 ?? 0.0003). Temperature had a significant effect on metabolic rate (r2 = 0.41) with a Q10 of 2.2. Standard metabolic rate (SMR), determined directly after immobilization with the neuroblocker gallamine triethiodide, ranged from 2.2-6.2 mmolO2 kg-1 h-1 and scaled with mass (W) such that SMR = 4.0 (??0.03)W(0.695(??0.15)). Comparison of directly determined and extrapolated SMR suggests that swimming respirometry provides a good estimate of SMR in this species, given the differences in basal activity monitored by the two methods. Overall, American shad metabolic rates (M(O2) and SMR) were intermediate between salmonids and fast-swimming perciforms, including tunas, and may be a result of evolutionary adaptation to their active pelagic, schooling life history. This study demonstrates variability in metabolic strategy among anadromous fishes that may be important to understanding the relative success of different migratory species under varying environmental conditions.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Metabolic rates in an anadromous clupeid, the American shad (Alosa sapidissima)
Series title:
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology
DOI:
10.1007/s003600050223
Volume
169
Issue:
4-5
Year Published:
1999
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology
First page:
287
Last page:
295
Number of Pages:
9