The effect of fishing on blue crab abun- 

 dance in Chesapeake Bay is not under- 

 stood. The relation between the numbers 

 of spawners and numbers of young pro- 

 duced can be obtained by tagging, catch 

 records, and an annual measure of spawn- 

 ing success. A tag that is retained after 

 molting is shown. History of supply and 

 the annual landings in Chesapeake Bay 

 since 1890 are presented. 



Mendelson, Martin. 



1966. The site of impulse initiation in bipolar 



receptor neurons of Callinectes sapidus L. 



[sic]. Journal of Experimental Biology, vol. 



45, No. 3, p. 411-420. 



Direct measurement with intracellular elec- 

 trodes indicated the impulse threshold of 

 the soma region of blue crab propoditedac- 

 tylopodite bipolar neurons from resting 

 potential. Some responses are accompanied 

 by impulses in the axon. Impulses appear 

 to originate normally in the distal process 

 in response to adequate stimuli. 



Menzel, R. Winston. 



1943. The catfish fishery of Virginia. Trans- 

 actions of the American Fisheries Society, 

 vol. 73, p. 364-372. 



Stomachs of channel catfish contained 

 small blue crabs; a 9-pound fish had eaten 

 three 50-mm.-wide crabs. 



Menzel, R. Winston, and Sewell H. Hopkins. 

 1956. Crabs as predators of oysters in Louisi- 

 ana. Proceedings of the National Shellfisheries 

 Association, 1955, vol. 46, p. 177-184. 



Along the Gulf of Mexico, blue crabs 

 reportedly kill adult oysters only if the 

 oysters are unhealthy, but they destroy an 

 appreciable number of healthy spat. 



Menzel, R. Winston, and Fred W. Nichy. 



1958. Studies of the distribution and feeding 

 habits of some oyster predators in Alligator 

 Harbor, Florida. Bulletin of Marine Science of 

 the Gulf and Caribbean, vol. 8, No. 2, p. 

 125-145. 



The blue crab, abundant in Alligator Har- 

 bor, killed healthy small oysters and ate 

 weakened large oysters. 



Menzel, R. W., and H. W. Sims. 



1964. Experimental farming of hard clams, 

 Mercenaria mercenaria, in Florida. Pro- 

 ceedings of the National Shellfisheries Asso- 

 ciation, 1962, vol. 53, p. 103-109. 



Blue crabs cracked 90 percent of unpro- 

 tected small hard clams planted to test the 

 feasibility of commercial clam farming. 



Meyer, Marvin C, and Albert A. Barden, Jr. 

 1955. Leeches symbiotic on Arthropoda, 

 especially decapod Crustacea. Wasmann 

 Journal of Biology, vol. 13, No. 2, p. 

 297-311. 



Myzobdella lugubris commonly infests the 

 blue crab, but it is unlikely that the 

 relationship is parasitic. It was found that 

 oysters and prawns are infested also. 



Mills, H. R. 



1952. Deaths in the Florida marshes. Audu- 

 bon Magazine, vol. 54, p. 285-291. 



Monthly sprayings of salt marshes with 0.2 

 pound per acre of DDT caused deaths of 

 blue crabs. 



Milne, Robert C. 



1965. Crab predation on a duckling. Journal 

 of Wildlife Management, vol. 29, No. 3, p. 

 645. 



An observation of the capture of a gadwall 

 duckling by a 6-inch blue crab in a coastal 

 North Carolina impoundment. 



Milne Edwards, Alphonse. 



1879. Varietes de la Cote Atlantique, p. 

 224-227. In Alphonse Milne Edwards, Etudes 

 sur les Xiphosures et les Crustaces de la 

 Region Mexicaine. Mission Scientifique au 

 Mexique et dans l'Amerique Centrale, Re- 

 cherches Zoologiques, Pt. 5. 



Data on distribution and descriptions of 

 external anatomy are given for the blue 

 crab and for other members of the genus. 



Miner, Roy Waldo. 



1950. Callinectes sapidus, p. 521. In Roy 

 Waldo Miner, Field book of seashore life. G. 

 P. Putnam's Sons, New York. 



Reported to occur from Cape Cod to 

 Florida and around the Gulf of Mexico to 

 the Mississippi River. Color and certain 

 recognitional characters are given. 



49 



