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Title The Cost of Ethanol Synthesis During Recovery from Exhaustive Exercise in Grass Carp (Ctenopharyngodon idella)
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Publication Date
University/Publisher University of Western Ontario
Abstract Grass carp (Ctenopharyngodon idella) reduce white muscle glycogen (~14 µmol glucosyl units/g wet tissue) in response to exhaustive exercise. This reduction results in a small increase in muscle lactate (~9 µmol/g wet tissue) and a larger increase in muscle ethanol (~30 µmol/g wet tissue). Tissue-specific and whole-body measures of glycogen, ethanol and lactate confirm that ethanol is the major “anaerobic” glycolytic end-product. Additionally, while peak muscle and blood ethanol levels occur immediately post-exercise, the excretion of ethanol to the environment is delayed, occurring over a 30-minute period beginning ~105 minutes following exercise. As the total amount of ethanol synthesized in the white muscle does not account for that synthesized in the whole-body, it may be that the red muscle is also involved. The clearance and excretion of ethanol to the environment following exercise represents ~100% of the whole-body glycolytic pool used during exercise and therefore represents a significant carbon cost to the muscle’s glycolytic pool.
Subjects/Keywords Grass Carp; Burst Exercise; Recovery; Anaerobic Metabolism; ADH; Ethanol.; Biology; Comparative and Evolutionary Physiology; Exercise Physiology
Language en
Country of Publication ca
Format application/pdf
Record ID oai:ir.lib.uwo.ca:etd-2368
Repository uwo
Date Retrieved
Date Indexed 2019-01-07

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…List of Tables Table 1: Percentage of the whole body glycolytic pool lost as ethanol as a consequence of exercise in grass carp. ................................................................................................... 35 viii List…

…to exhaustive exercise in hypoxia-tolerant cyprinids. ..................... 13 Figure 6: Ethanol excretion at rest (R) and throughout 4 hours of recovery from exhaustive exercise in grass carp

…24 Figure 7: Oxygen consumption at rest (R) and throughout 4 hours of recovery from exhaustive exercise in grass carp. ..................................................................................... 25 Figure 8: White muscle…

…x28;A), liver (B), blood (C) and heart (D) ethanol at rest (R) and throughout 4 hours of recovery from exhaustive exercise in grass carp........................... 26 Figure 9: White muscle (A)…

…liver (B), blood (C) and heart (D) lactate at rest (R) and throughout 4 hours of recovery from exhaustive exercise in grass carp........................... 27 Figure 10: White muscle ATP (A) and PCr…

…x28;B) at rest (R) and throughout 4 hours of recovery from exhaustive exercise in grass carp. ............................................................. 28 Figure 11: White muscle (A) and liver (B) glycogen at…

…rest (R) and throughout 4 hours of recovery from exhaustive exercise in grass carp. ............................................................. 31 ix Figure 12: White muscle (A), liver (B), blood (C) and…

…heart (D) glucose at rest (R) and throughout 4 hours of recovery from exhaustive exercise in grass carp........................... 32 Figure 13: Whole-body lactate (A) and ethanol (B) at rest (R) and…

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