Tagatz, Marl in E. 



1965. The fishery for blue crabs in the St. 

 Johns River, Florida, with special reference to 

 fluctuation in yield between 1961 and 1962. 

 U.S. Fish and Wildlife Service, Special Scien- 

 tific Report— Fisheries No. 501, 11 p. 



Description of the fishery together with 

 catch and effort statistics for 1961 and 

 1962. Factors responsible for determining 

 the size of the catch. Sex ratio, width, and 

 weight of crabs in the catch. 

 1967. Noncommercial crabs of the genus 

 Callinectes in St. Johns River, Florida. Chesa- 

 peake Science, vol. 8, No. 3, p. 202-203. 



As possible competitors to juvenile blue 

 crabs in nursery areas. 

 1968a. Biology of the blue crab, Callinectes 

 sapidus Rathbun, in the St. Johns River, 

 Florida. U.S. Fish and Wildlife Service, 

 Fishery Bulletin, vol. 67, No. 1, p. 17-33. 

 Widely distributed in fresh water. Tag 

 returns ranged from Jekyll Island, Ga., to 

 New Smyrna Beach, Fla. Life history. 

 Many females from the ocean returned to 

 estuaries to spawn; some returned twice. 

 Larval Callinectes dominant crab form in 

 plankton collections. Postlarval crabs did 

 not appear in the estuary in significant 

 numbers until 6 months after hatching had 

 begun. They entered in waves, after several 

 molts as crabs. Major foods of juveniles and 

 adults were mollusks, fish, and crustaceans. 

 1968b. Growth of juvenile blue crabs, Callin- 

 ectes sapidus Rathbun, in the St. Johns River, 

 Florida. U.S. Fish and Wildlife Service, 

 Fishery Bulletin, vol. 67, No. 2, p. 281-288. 

 Juveniles were held in wooden floats in salt 

 water and in fresh-water portions of the 

 river. Length-width ratios, molt intervals, 

 relative growth, estimated absolute growth, 

 and effects of season and salinity on 

 growth. 

 1969. Some relations of temperature acclima- 

 tion and salinity to thermal tolerance of the 

 blue crab, Callinectes sapidus. Transactions of 

 the American Fisheries Society, vol. 98, No. 

 4, p. 713-716. 



Experimental data indicated that crabs 

 were less tolerant to temperature extremes 

 at low salinity; at both low and high 

 salinities, the upper and lower tolerance 

 limits (temperatures at which 50 percent 



survive for 48 hours) increased as the 

 acclimation temperature increased. Limits 

 for adults and juveniles were similar. 



Tan, Eng-Chow. 



1962. Studies on osmotic and ionic regulation 



in the blue crab, Callinectes sapidus Rathbun. 



M.A. thesis, College of William and Mary, 



Williamsburg, Va., 66 p. 



Osmotic concentrations of the blood and 

 the sodium and potassium content and 

 sodium to potassium ratio of the serum of 

 adult crabs exposed to different salinities. 



Tan, Eng-Chow, and W. A. Van Engel. 



1966. Osmoregulation in the adult blue crab, 

 Callinectes sapidus Rathbun. Chesapeake 

 Science, vol. 7, No. 1, p. 30-35. 



The blood osmoconcentrations of adult 

 males and females in salinities of 10, 20, 

 and 30 p.p.t. at 20° C. indicated that 

 females were the less efficient osmo- 

 regulators in lower salinities. The difference 

 between sexes was partly due to their 

 differential abilities to regulate sodium in 

 the blood. 



Tappel, A. L. 



1960. Cytochromes of muscles of marine 

 invertebrates. Journal of Cellular and Com- 

 parative Physiology, vol. 55, No. 2, p. 

 111-126. 



Comparative spectro-photometric studies 

 of the cytochromes of some crustaceans 

 (including C. sapidus) and bivalve mollusks. 

 They were defined qualitatively by dif- 

 ference and low temperature spectra and 

 measured quantitatively from difference 

 spectra. 



Taylor, Francis B. 



1956. 39 fathoms southeast, North Edisto sea 

 buoy off South Carolina. Bears Bluff Labora- 

 tories, Wadmalaw Island, S.C., Contribution 

 No. 20, 15 p. 



Experimental trawling to locate popula- 

 tions of commercial fish and shellfish on 

 the continental shelf off South Carolina. 

 An objective was to determine the pelagic 

 movements of the blue crab. Some evi- 

 dence indicated that blue crabs migrate by 

 sea between rivers and that they sometimes 

 spawn far offshore. 



68 



