. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 386 CLOSER MUSCLES IN LARVAL LOBSTERS 8- Proximal Dorsal 6- 4- l/l OL UJ CD 2- ] W Discal Dorsal. LLJ 8- Proximal Ventral D ^_ 6- 4- m 2- 1 m [ h u 1! ,tal V( n :i Ural 1 2468 246 SARCOMERE LENGTH (urn) FIGI/RK 4. Frequency histogram of muscle fiber types (based on sarcomere lengths) showing the regional distribution on the inner aspect of a Claw I closer muscle in a larval second stage lobster. fun (Fig. 3). The fiber types do not appear to be regionally distributed, as both types occur in all four sections sampled (Fig
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 386 CLOSER MUSCLES IN LARVAL LOBSTERS 8- Proximal Dorsal 6- 4- l/l OL UJ CD 2- ] W Discal Dorsal. LLJ 8- Proximal Ventral D ^_ 6- 4- m 2- 1 m [ h u 1! ,tal V( n :i Ural 1 2468 246 SARCOMERE LENGTH (urn) FIGI/RK 4. Frequency histogram of muscle fiber types (based on sarcomere lengths) showing the regional distribution on the inner aspect of a Claw I closer muscle in a larval second stage lobster. fun (Fig. 3). The fiber types do not appear to be regionally distributed, as both types occur in all four sections sampled (Fig. 4). Yet there may be a tendency for the proximal ventral section to contain only intermediate fibers (Fig. 4) as half the closer muscle samples were thus characterized. Statistical comparisons of claw muscle fiber populations did not reveal any differences between Claw I and Claw II, either for a single animal or for the summed populations of the three animals. Likewise there was no significant difference (at the level) between the Claw I and Claw II populations of stage 2 as compared to the respective populations of stage 1. Stage 3 The sampling procedure for stage 3 closer muscles was similar to that followed for stage 2 muscles. The propus length measures approximately mm in stage 3 animals. A total of five animals was examined in this larval stage: three animals were sacrificed when they were midway through this stage and the remaining two when they were near the end of this stage (late 3rd stage in Table I). The 3rd stage closer muscle differs from its counterpart in the earlier stages hi two respects. First, there is an increase in the number of long sarcomere fibers which now comprise between \ and 40/v in stage 3 as compared to rt sarcomere fiber population. Secondly, although there is still a bimodal dis- tribution of fiber types in stage 3 muscles, the second peak (intermediate fibers). Please note that these images are extracted from scanned page image
Size: 1550px × 1611px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
