. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 126 G. G\I>I 6). Anoxic incubation resulted in a significant increase in both tissues. In the loot muscle, initial values were rap- idly achieved after 1 h > ,\. In contrast, succinate levels in the shell adductor declined more slowly, and took 3 h to reach pre-ano\ic levels. Taurine levels were about twice as high in the shell ad- ductor as in the foot of control abalones. No significant changes occurred in the foot. There was a significant de- cline in the shell adductor muscle during anoxia without any restoration i
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 126 G. G\I>I 6). Anoxic incubation resulted in a significant increase in both tissues. In the loot muscle, initial values were rap- idly achieved after 1 h > ,\. In contrast, succinate levels in the shell adductor declined more slowly, and took 3 h to reach pre-ano\ic levels. Taurine levels were about twice as high in the shell ad- ductor as in the foot of control abalones. No significant changes occurred in the foot. There was a significant de- cline in the shell adductor muscle during anoxia without any restoration in the recovery period (Figs. 7, 8). Sub- stantial accumulations of tauropine were evident in the shell adductor muscle during anoxia, while a small, but significant, formation occurred in the foot muscle. In the latter tissue, the main anaerobic end product was D-lac- tate. which also accumulated in the adductor, but to a much lesser extent (50%) than tauropine (Figs. 7. 8). D- lactate levels were rapidly cleared to 50% of the anoxic level during the first hour of recovery in the foot. Both tauropine and D-lactate levels remained high in the shell adductor after 3 h of recovery. Even after 13 h of recov- ery these levels were still higher than the initial concen- trations before anoxia. No significant changes in the levels of glucose-6-phos- phate ( and /zmoles/g w. wi. in shell adductor and foot muscle, respectively) were observed during an- oxic incubation and recovery (results not shown). Metabolic responses to functional hypoxia The levels of the adenylates, arginine-containing com- pounds, and various other metabolites in the shell ad- ductor muscle and the foot during exercise are listed in Table II. There was no significant change in the energy charge or in the levels of arginine phosphate in either tis- sue. Aspartate levels were marginally, but significantly, diminished in the shell adductor, whereas a small, but significant rise in the levels of L-alanine was
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
