discharge in low calcium sea water do not 

 respond to a cold stimulus, but an increase 

 of potassium decreases the rate of discharge 

 and restores thermal responsiveness. 



Shuster, Carl N., Jr. 



1959. A biological evaluation of the Delaware 

 River Estuary. University of Delaware, Infor- 

 mation Series, Publication No. 3, 77 p. 



Describes the fishery for the blue crab in 

 Delaware Bay. Food studies showed that 

 the blue crab was eaten by striped bass and 

 that crab larvae (not identified) were a 

 major food of the common anchovy. 



Shuster, Carl N., Jr., David H. B. Ulmer, Jr., and 



Willard A. Van Engel. 



1963. A commentary on claw deformities in 

 the blue crab. Estuarine Bulletin, vol. 7, No. 

 2-3, p. 15-23. 



Deviation from symmetry in the external 

 structure of crab claws. Types of claw 

 deformities. Only one injury site is suffi- 

 cient to produce duplicate parts, and the 

 site and depth of injury determines what 

 kind of abnormality will develop. Genetic 

 mechanism for spine production, change in 

 chemical composition of tissues and urine 

 from tissue damage, and stage in the 

 intermolt cycle, as they relate to deformi- 

 ties. 



Siebenaler, J. B. 



1955. Commercial fishing gear and fishing 

 methods in Florida. Florida Board of Conser- 

 vation, Technical Series, No. 13, 47 p. 



Construction and methods of fishing two 

 types of traps used in Florida to catch 

 crabs. 



Sieling, F. W., and D. G. Cargo. 



1955. Maryland's winter crab fishery opens in 

 Chincoteague Bay. Maryland Tidewater News, 

 vol. 11, No. 8, p. 1-2. 



Description of the winter crab fishery. 

 Chincoteague crabs average smaller than 

 those from Chesapeake Bay and may repre- 

 sent a genetically stunted race. 



Simmons, E. G. 



1957. An ecological survey of the upper 

 Laguna Madre of Texas. Publications of the 



Institue of Marine Science, University of 



Texas, vol. 4, No. 2, p. 156-200. 



Blue crabs in the Laguna Madre (salinity 

 range, 27-78 p.p.t.) increased in winter 

 when salinity was low, but not in Decem- 

 ber, 1956, when salinity was high. The 

 higher the salinity, the smaller the average 

 size of blue crabs and many other inverte- 

 brates. 



Sims, Harold W., Jr., and Edwin A. Joyce, Jr. 



1966. Partial albinism in a blue crab. Quarter- 

 ly Journal of the Florida Academy of 

 Sciences, vol. 28 (1965), No. 4, p. 373-374. 



Partial albinism of a crab captured in 

 Tampa Bay appeared to be the first case 

 reported from Florida. 



Sindermann, Carl J., and Aaron Rosenfield. 



1967. Principal diseases of commercially 

 important marine bivalve Mollusca and Crus- 

 tacea. U.S. Fish and Wildlife Service, Fishery 

 Bulletin, vol. 66, No. 2, p. 335-385. 



Diseases and parasites of blue crabs 

 include: a disease of undetermined etiology 

 ("gray crab disease"), which causes deaths 

 of crabs in Virginia; the fungus Lagenidium 

 callinectes, which parasitized eggs of crabs 

 in Chesapeake Bay; the microsporidans 

 Nosema sp. and Plistophora cargoi, para- 

 sitic in muscles of Chesapeake Bay crabs; 

 ciliates of the genera Lagenophrys and 

 Epistylus which infested crab gills and 

 caused mortalities in Chesapeake Bay; 

 trematode larvae of Microphallus nicolli, 

 which encysted in muscles; the nemertean 

 Carcinonemertes carcinophila, parasitic on 

 the gills and eggs; the leech Myzobdella 

 lugubris, thought to cause mortality in 

 Florida; and the rhizocephalan Loxo- 

 thylacus texanus, parasitic on crabs from 

 Gulf of Mexico. Refers to extensive blue 

 crab mortalities of unknown cause in North 

 Carolina and South Carolina. 



Slocum, Glenn G. 



1955. Bacteriology of crabmeat as related to 

 factory sanitation. Quarterly Bulletin of the 

 Association of Food and Drug Officials, vol. 

 19, p. 43-50. 



This study concerns the development of 

 sanitation in the production of crab meat 



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