and Callinectes sapidus, Rathbun). Physi- 

 ologia Comparata et Oecologia, vol. 3, No. 4, 

 p. 365-369. 



Arthropodine was extracted and reprecipi- 

 tated from the cep halo thoracic exoskele- 

 ton. Cuticular scleroprotein was obtained 

 by further extraction. Amino acid compo- 

 sitions were estimated microbiologically. 



Duke, Thomas W., John P. Baptist, and Donald 

 E. Hoss. 



1966. Bioaccumulation of radioactive gold 

 used as a sediment tracer in the estuarine 

 environment. U.S. Fish and Wildlife Service, 

 Fishery Bulletin, vol. 65, No. 2, p. 427-436. 

 Accumulation by selected marine animals 

 in the laboratory and field. Only a small 

 portion of the gold placed in the gut of 

 blue crabs was assimilated from the stom- 

 ach, indicating that more than tracer 

 amounts would need to be ingested rapidly 

 before the gold would concentrate in edible 

 tissues. Blue crabs in sea water containing 

 radioactive gold accumulated more radio- 

 activity than clams, clay, and fish. In a field 

 test, oysters accumulated more gold than 

 did crabs and fish. 



Dumont, Wm. H., and G. T. Sundstrom. 



1961. Commercial fishing gear of the United 

 States. U.S. Fish and Wildlife Service, Circular 

 No. 109, 61 p. 



The crab pound net, trotline, crab dredge, 

 and wooden and wire pots used to capture 

 blue crabs are illustrated. 



Dunker, C. F., D. H. B. Ulmer, Jr., and G. W. 

 Wharton. 



1960. Factors affecting yield of meat from 

 the blue crab. Proceedings of the Gulf and 

 Caribbean Fisheries Institute, 12th Annual 

 Session, 1959, p. 40-46. 



Covers methods of cooking, seasonal yield 

 of various types of meat, effect of length of 

 cooking, comparison of yield of crabs from 

 two locations, effect of cooking tempera- 

 ture, handling after cooking, and summary 

 of optimum conditions for maximum yield. 



Dunnington, E. A. 



1956. Blue crabs observed to dig soft shell 

 clams for food. Maryland Tidewater News, 

 vol. 12, No. 12, p. 1,4. 



Patuxent River blue crabs commonly dug 

 and ate Mya arenaria. Both share the same 

 habitat. Adult crabs can dig a hole 4 inches 

 deep and as wide as their body in 20 to 30 

 minutes. Details of digging, which appears 

 to be a general search for food. Effects of 

 this predation upon the soft shell clam 

 population is not known. 



Earle, Swepson. 



1924. Maryland's efforts to save the blue crab 

 of Chesapeake Bay. Maryland Conservation 

 Bulletin No. 1, 16 p. 



Review of life history and development of 

 the industry. Scarcity and ways to conserve 

 crabs. Scarcity attributed to the capture of 

 egg-bearing females, waste of "buckram" 

 crabs, caging crabs before they are ready to 

 molt, and catching undersized crabs. 



1925. Crab conservation. Maryland Conserva- 

 tionist, vol. 2, No. 3, p. 14. 



The author reports that because of a 

 marked decrease in the supply of crabs in 

 Maryland, various conservation measures, 

 particularly protection for egg-bearing 

 female crabs in Virginia, must be adopted. 

 1932a. A blow to the Chesapeake crab indus- 

 try. Maryland Conservationist, vol. 9, No. 3, 

 p. 9-10. 



The reasons why a Virginia bill permitting 

 the taking of egg-bearing female crabs 

 during April, May, and June should not be 

 passed. 

 1932b. The fisheries of Chesapeake Bay. 

 Transactions of the American Fisheries Soci- 

 ety, vol. 62, p. 43-49. 



The blue crab was not greatly in demand 

 until about 1900, when refrigerated trans- 

 port service became available. Discusses 

 production decline to a low of 29 million 

 pounds in 1925 and the conservation 

 measures enacted. Life history reviewed. 



Earll, R. Edward. 



1887. Maryland and its fisheries, p. 421-448. 

 In George Brown Goode [ed.] The fisheries 

 and fishery industries of the United States, 

 Section 2, Pt. 10. U.S. Commission of Fish 

 and Fisheries, Washington, D.C. 



Methods of raising and shipping soft-shell 

 blue crabs (started at Crisfield in 1876), 

 and canning and shipping hard crabs. 



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