1805 



Thurberg , Frederick P., Anthony Calabrese, and Margaret A. Dawson. 1974. 



Effects of silver on oxygen consumption of bivalves at various salinities. 

 In Pollution and Physiology of Marine Organisms. Academic Press Inc., 

 New York: 67-78. 



Silver content of parts of Long Island Sound is an order of magnitude higher 

 than surrounding western North Atlantic waters. Oxygen consumption rate of 

 hard clams increased with decreasing salinity and with increasing Ag con- 

 centration at 25 and 35°/°°. Ag had no effect on already elevated consumption 

 values at 15°/°°. - J.L.M. 



1806 



Tiews, K. 197 3. 



Report on a survey of present research activities in the field of aquaculture 

 in the EIFAC region. Food and Agric . Org. of the U.N., FI:EIFAC 72/SC II-l, 

 Rev. 1, 29 March 1973, vii + 63 p. 



The only research currently being done on Venus (Mercenaries) mercenaria is 

 in the British White Fish Authority laboratory at Conway. - J.L.M. 



1807 



Tiffany, William J., III. 1972. 



Aspects of excretory ultrafiltration in the bivalved molluscs. Comp. Biochem. 

 Physiol. 43A(3): 527-536. 



Comparative osmotic pressure measurements of blood and pericardial fluid of 5 

 bivalve species, including Mercenaria mercenaria and M. campeohiensis , 

 demonstrated an osmotic pressure gradient from pericardial fluid toward the 

 blood. Systolic pressure in the ventricle of these species was smaller than 

 the osmotic pressure gradient. Therefore, ultrafiltration cannot take place 

 across ventricle into pericardial cavity. It is highly likely that auricular 

 and ventricular filling in these species is aided by negative pressures in the 

 pericardial cavity. - modified author's abstract - J.L.M. 



1808 



Tiffany, William J., III. 1974. 



Ultrastructural evidence for reabsorption in the nephridium of the bivalved 

 mollusc Mercenaria campeohiensis . Trans. Am. Microsc. Soc. 93(1): 23-28. 



The fine structure of the nephridium of M. campeohiensis resembles that of a 

 gastropod, goosefish, crayfish, and mammals. The basal region of the cells 

 contains dense conglomerations of alpha-glycogen rosettes. It is suggested 

 that the nephridium of this species may be a glycogen-storing organ, in 

 addition to its function in reabsorption of filterable metabolites, ions, and 

 water from the urine. - J.L.M. 



1809 



Tiller, R. E. 1950. 



Greenwich Cove survey. Ann. Conf., Clam Investigations, Boothbay Harbor, Me. 

 U.S. Dept. Interior, Fish Wildl. Serv.: 18-19. 



The Cove was divided into 4 approximately equal subareas . Total area 10.75 

 million ft2 or 274 acres. Area 1 (upper cove); total area 2.555 million ft 2 ; 

 area sampled 50 ft2; number of clams 0.38 clams/ft 2 ; total estimated 

 population 970.9 thousand clams. Area 2 (downstream): total area 2.888 ft 2 ; 

 area sampled 150 ft 2 ; number of clams 0.31 clams/ft 2 ; total estimated 

 population 895.4 thousand clams. Area 3 (downstream further): total area 

 2.177 million ft 2 ; area sampled 150 ft 2 ; number of clams 1.26 clams/ft 2 ; 

 total estimated population 2.743 million clams. - J.L.M. 



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