. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SA TQ u r op i n e D-Lactate L 8 Time (h) 12 16 Figure 7. Time-course of the levels of taurine (upper panel) and (lower panel ) D-lactate ( solid circles) and tauropine (open circles) in the shell adductor muscle (SA) ofHaliotis tamellosa during experimental anoxia and recovery. For further details, see Figure 2. vated significantly in the shell adductor muscle, whereas the D-lactate levels were doubled in the foot without any significant rise in the tauropine levels. Discussion This study in the ormer is a good example of t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SA TQ u r op i n e D-Lactate L 8 Time (h) 12 16 Figure 7. Time-course of the levels of taurine (upper panel) and (lower panel ) D-lactate ( solid circles) and tauropine (open circles) in the shell adductor muscle (SA) ofHaliotis tamellosa during experimental anoxia and recovery. For further details, see Figure 2. vated significantly in the shell adductor muscle, whereas the D-lactate levels were doubled in the foot without any significant rise in the tauropine levels. Discussion This study in the ormer is a good example of the prin- ciple that anaerobic energy metabolism in a muscle is specifically matched to the function of the muscle. It re- flects adaptation to specific metabolic need of the tissue. The two investigated tissues, the foot and the shell ad- ductor muscle, are employed by the animal for different tasks. The foot is mainly responsible for slow gliding movements that very likely are supported by aerobic me- tabolism. In contrast, the shell adductor muscle pulls the ormer's shield-like shell tightly to the substratum to pre- clude dessication during low tide and to prevent dislodg- ing by wave action. The shell adductor also rights an ani- mal that has been detached from the rocks. Thus, the shell adductor muscle is mctaholically more active than the foot and performs burst contractions which, in gen- eral, rely on anaerobic metabolism. However, when the whole animal has to cope with hypoxic or even anoxic conditions, both tissues need to have the capacity for maintaining metabolism Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore,
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