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Title of the item:

Experimental transformation of muscle fiber properties in lobster.

Title :
Experimental transformation of muscle fiber properties in lobster.
Authors :
Lang F
Govind CK
Costello WJ
Show more
Source :
Science (New York, N.Y.) [Science] 1978 Sep 15; Vol. 201 (4360), pp. 1037-9.
Publication Type :
Journal Article; Research Support, U.S. Gov't, P.H.S.
Language :
Imprint Name(s) :
Publication: : Washington, DC : American Association for the Advancement of Science
Original Publication: New York, N.Y. : [s.n.] 1880-
MeSH Terms :
Animals ; Morphogenesis ; Muscle Contraction ; Muscles/anatomy & histology ; Nephropidae/anatomy & histology ; Nephropidae/genetics
Entry Date(s) :
Date Created: 19780915 Date Completed: 19781025 Latest Revision: 20190618
Update Code :
Academic Journal
Like the chelipeds, the claw closer muscles of the adult lobster are asymmetric (dipmorphic). In the crusher claw the closer muscle is composed entirely of slow fibers, and in the cutter claw it has 65 to 75 percent fast fibers and 25 to 35 percent slow fibers. While claw placement in the adult is essentially random, it can be demonstrated in two ways that the muscle fiber properties are not genetically fixed: (i) if one claw is removed in the fourth and early fifth stages, the remaining closer muscle develops all slow muscle fibers, and (ii) if the animals are raised in smooth-bottomed containers, both claws can become cutter types, having closer muscles with more than 50 percent fast fibers. Thus, as in vertebrate skeletal muscle, the properties of lobster closer muscle fibers can be transformed by various experimental manipulations.

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