. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 402 A T. READ AND C. K. GOVIND. Figure 1. Adult snapping shrimp showing different configurations of their paired claws. (Al Pristine asymmetric configuration in which the snapper (right claw) is extremely hypertrophied, with a pronounced hammer and socket, and the pincer (left claw) is small, slender, and lacks the snapping apparatus. (B) Newly regenerated paired pincer claws which are smaller than their pristine counterparts. (C) Paired snapper claws with newly regenerated snapper (right claw) and dactyl-less transformed pi
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 402 A T. READ AND C. K. GOVIND. Figure 1. Adult snapping shrimp showing different configurations of their paired claws. (Al Pristine asymmetric configuration in which the snapper (right claw) is extremely hypertrophied, with a pronounced hammer and socket, and the pincer (left claw) is small, slender, and lacks the snapping apparatus. (B) Newly regenerated paired pincer claws which are smaller than their pristine counterparts. (C) Paired snapper claws with newly regenerated snapper (right claw) and dactyl-less transformed pincer (left claw). (D) Newly regenerated paired snapper claws which are much smaller and not as highly differentiated as their pristine counterparts. (E) Pristine paired snapper claws in which the paired claws are similar in size and differentia- tion. Scale bar 10 mm. damage to the nervous system of the snapper claw, it is likely that the transformation results from loss of the neu- ral inhibition by which the snapper claw prevents the pincer claw from completing its development to a snapper (Wilson, 1903). Because regenerating claws in adult shrimp pass through a distinct pincerlike stage before differentiating into a snapper claw (Wilson, 1903; Darby. 1934: Read and Govind, 1997), we have devised a scheme in which loss of the snapper claw removes its inhibition on the pincer, which then advances to a snapper and in turn inhibits the newly regenerating claw to a pincer. Snapper-based inhibition of the pincer claw can also explain why loss of the pincer claw in adult shrimp results in the regeneration of another pincer (Wilson, 1903). To explain the fact that simultaneous loss of both claws re- sults in claw regeneration in the same configuration, we would have to assume that snapper-based inhibition pre- vails even in the absence of claws. Thus, no matter which claw is lost, inhibition by the snapper claw (or its site) on the pincer claw (or its site) ensures regeneration
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
