314 



Charest, Margaret. 1978. 



Great South Bay is major supplier to hard clam lovers of America. Natl. 

 Fisherman 58(9): 4B-5B. 



Describes types of gear and vessels, market grades of clam, transplants, 

 problems of winter clamming, and effects of pollution. - J.L.M. 



315 



Charles, G. H. 196 6. 



Sense organs (less Cephalopods) . In Physiology of Mollusca. Karl M. 

 Wilbur and C. M. Yonge (edsO . Academic Press, New York, Vol. II: 455-521. 



Contains references to Mercenaria (Venus) mercenaria abstracted elsewhere 

 in this bibliography. - J.L.M. 



316 



Check, Ronald M., and Manuel T. Canario, Jr. 1972. 



Residues of chlorinated hydrocarbon pesticides in the northern quahog (hard- 

 shell clam), Mercenaria mercenaria - 1968 and 1969. Pestic. Monit. J. 6(3): 

 229-230. 



Samples were collected in most months from Sept 1968 to Sept 1969 at 5 

 locations in Narragansett Bay, R.I. and one in nearby Mount Hope Bay. 

 Dieldrin was present in all 56 samples and p, p' - DDD in 3. Absence of DDE 

 and DDT in amounts greater than 0.02 ppm was an unexpected result. Average 

 levels were 0.04 ppm for dieldrin and 0.026 ppm for p, p' DDD. Residues of 

 dieldrin and DDD were higher in samples from upper reaches of Narragansett 

 Bay. - J.L.M. 



317 



Chekenian, Jane. 19 73. 



All about clams. LI, Newsday's Magazine for Long Island, 22 July 1973: 11-16. 



Popular account of hard clam industry on Long Island, New York, including 

 early history, clam distribution, kinds of clamming gear, and brief descrip- 

 tions of razor clam, skimmer or surf clam, and dangers of water pollution. 

 Includes an interview with Jeffrey Zegel, one of the more successful full- 

 time diggers on Great South Bay. - J.L.M. 



318 



Cheng, Thomas C. 1965. 



Parasitological problems associated with food protection. J. Envir . Health 

 28(3) : 208-214. 



Parasites in food can be transmitted to man, can cause chemical changes in 

 food which are detrimental to man, or can be of concern because their effects 

 have not been studied adequately. This paper reviews knowledge of these 3 

 categories. Trematodes, nematodes, and other parasitic organisms are known 

 to be present in Mercenaria mercenaria , other mollusks, and fishes. Infec- 

 tion of man is particularly probable when seafood is eaten raw, as hard 

 clams are, partially cooked, as with clams steamed open, or smoked. Much 

 remains to be learned about transmission of parasites by marine organisms. 

 More data are needed. References to M. mercenaria cite papers abstracted 

 elsewhere in this bibliography. - J.L.M. 



87 



