. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. D dactyl transverse groove propus. pollex Figure 2. A pristine pincer claw (A) progressively developing via two selected stages (B. C) into a pristine snapper claw (Dl characterized by a hammer (arrow) and socket (double arrow), a transverse groove, and hypertrophy of the entire claw. The slender pristine pincer claw (A) acquires all the snapper features after the first molt (B). and in subsequent molts (C. D) becomes hypertrophied with further accentua- tion of the snapper features. Scale bar 3 mm. x6 be equally effective.
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. D dactyl transverse groove propus. pollex Figure 2. A pristine pincer claw (A) progressively developing via two selected stages (B. C) into a pristine snapper claw (Dl characterized by a hammer (arrow) and socket (double arrow), a transverse groove, and hypertrophy of the entire claw. The slender pristine pincer claw (A) acquires all the snapper features after the first molt (B). and in subsequent molts (C. D) becomes hypertrophied with further accentua- tion of the snapper features. Scale bar 3 mm. x6 be equally effective. Ten animals were successfully ma- nipulated so that the snapper was autotomized and the pincer dactylotomized. In all cases, the pincer transformed 8' O to E C ra <D a. 09 , .V 01 2345 Pleopod stage in premolt shrimps Figure 3. Relationship between pleopod stage in premolt shrimp subjected to snapper autotomy and pincer-to-snapper transformation in- dex defined by 0 as pristine pincer and 10 as pristine snapper. The degree to which the pincer transforms is linearly related (regression line) to the stage at which the snapper is removed in premolt shrimps. JV = 37. r = (P < ). slope b = into a snapper; , it hypertrophied and developed a socket, despite lacking a dactyl (Table la). In 7 of those 10 shrimp, a snapper regenerated on the contralateral side, resulting in a symmetrical animal, albeit one snapper lacked a dactyl (Fig. 1C) and the regenerated snapper often did not grow to pristine proportions. In the other 3 shrimp, a pincer regenerated at the snapper site, resulting in a reversal of asymmetry. Thus pincer dactylotomy. mimicking a mild form of denervation, appeared to be sufficient to remove snapper-based inhibition of the re- generating claw. Can snapper-based inhibition of a regenerating pincer claw he removed? Loss of the pincer claw results in the regeneration of another pincer claw presumably because the contralateral snapper restricts r
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
