methods. Annotated list of animals found 

 on or in sand beaches. Blue crabs were 

 abundant on beaches and in deep water and 

 ranged into fresh water. 



Pearson, John C. 



1931. Winter trawl fishery off the Virginia 

 and North Carolina coasts. U.S. Bureau of 

 Fisheries, Investigational Reports, vol. 1, No. 

 10, 31 p. 



The absence of the blue crab from the 

 winter trawl catch indicates that this 

 species probably remains within Chesa- 

 peake Bay or close inshore during the 

 colder as well as the warmer months, rather 

 than moving far out to sea during winter. 

 1942. Decline in abundance of the blue crab, 

 Callinectes sapidus, in Chesapeake Bay during 

 1940 and 1941, with suggested conservation 

 measures. U.S. Fish and Wildlife Service, 

 Special Scientific Report No. 16, 27 p. 



Discusses history of blue crab conservation; 

 evidences of depletion; and causes of deple- 

 tion, including natural factors (fish and 

 jellyfish predators and subnormal water 

 temperatures), intensity of the fishery, and 

 waste in the fishery. A list of nine recom- 

 mendations to conserve the supply. 

 1948. Fluctuations in the abundance of the 

 blue crab in Chesapeake Bay. U.S. Fish and 

 Wildlife Service, Research Report, No. 14, 26 



P- 



Abundance fluctuated in Chesapeake Bay 

 for half a century. Life history and fisheries 

 for hard and soft crabs. No correlation 

 between relative abundance of adult 

 females and their progeny. Effects of tem- 

 perature and river discharge on abundance. 

 1951. The blue crab in North Carolina, p. 

 205-218. In Harden F. Taylor, Survey of 

 marine fisheries of North Carolina. University 

 of North Carolina Press, Chapel Hill. 



Life history (Chesapeake Bay) and distribu- 

 tion. History of the blue-crab industry in 

 North Carolina, hard- and soft-crab 

 fisheries, and production in North Carolina. 

 Reported an inverse correlation between 

 the annual catch of crabs in Chesapeake 

 Bay and in North Carolina from 1929 to 

 1942. Future development discussed. Full 

 exploitation had not occurred because of 

 various economic restrictions. 



Perkins, Earle B., and Benjamin Kropp. 



1932. The crustacean eye hormone as a 

 vertebrate melanophore activator. Biological 

 Bulletin (Woods Hole), vol. 63, No. 1, p. 

 108-112. 



To test the interspecificity of the chroma- 

 tophore activator found in the crustacean 

 eyestalk and to establish its hormone 

 nature, extracts from Palaemonetes vulgaris 

 and C. sapidus were injected into tadpoles 

 of Rana. Extracts from both crustaceans 

 caused the tadpoles to darken. 



Perkins, Margaret S., and Ernest B. Wright. 



1969. Crustacean axon. I. Metabolic proper- 

 ties: ATPase activity, calcium binding, and 

 bioelectric correlations. Journal of Neuro- 

 physiology, vol. 32, No. 6, p. 930-947. 



Na + -K + - activated ATPase from micro- 

 somal particles of the peripheral nerve of 

 claws and legs of the blue crab were 

 examined. 



Perret, William S. 



1967. Occurrence, abundance, and size dis- 

 tribution of the blue crab, Callinectes sapidus, 

 taken with otter trawl in Vermilion Bay, 

 Louisiana, 1964-65. Proceedings of the 

 Louisiana Academy of Sciences, vol. 30, p. 

 63-69. 



Relative abundance, size distribution, and 

 sex ratio are presented by month for crabs 

 collected from three locations. 



Perry, C. A., and A. A. Hajna. 



1935. Routine use of a modified Eijkmann 

 medium in examination of crab meat. Ameri- 

 can Journal of Public Health, vol. 25, No. 6, 

 p. 720-724. 



Data is presented on the practical applica- 

 tion of a modified medium in the Eijkmann 

 test for Bacillus coli in crab meat. 



Pew, Patricia. 



1966. Food and game fishes of the Texas 

 coast. Texas Parks & Wildlife Department, 

 Bulletin No. 33, 68 p. 



C. sapidus was the most abundant food 

 item in stomachs of some spotted jewfish, 

 Promicrops itaiara. 



55 



