2075 



Zs-Nagy, Imre. 1977. 



On the validity of enzymatic assay of adenosine phosphates in crude extracts 

 of some marine bivalves. Comp. Biochem. Physiol. 56B(3): 271-272. 



Mercenaria (Venus) mercenaria is not mentioned. - J.L.M. 



2076 



Zs-Nagy, I., S. K. Rozsa, J. Salanki, I. Foldes, L. Perenyi, and M. Demeter. 

 1965. 



Subcellular localization of 5-hydroxytryptamine in the central nervous 

 system of lamellibranchiates . J. Neurochem. 12(4): 245-251. 



Deals with freshwater mussels, genus Anodonta. Mercenaria (Venus) 

 mercenaria is not mentioned. - M.W.S. and J.L.M. 



2077 



Zuraw, E. A., D. E. Leone, and W. T. Sommers . 1969. 



Ecology of bivalve mollusks and the culture of Mya arenaria. General 

 Dynamics, Elect. Boat Div., Groton, Conn., 1 Sept. 1969 99 p. + 16 p. 

 appendix. 



Of 7 species of relatively abundant bivalves in Green Hill Pond, R.I., only 

 Mercenaria mercenaria remained relatively constant in abundance over a 3-year 

 period. Juveniles were found principally in channel regions where maximum 

 water interchange takes place with Charlestown Pond (which in turn connects 

 with the sea) . Mercenaria survives best in sand, and can be called mud- 

 intolerant, but substrate alone is not an important factor limiting bivalve 

 distributions. Gemma was found in 82% of samples containing Mercenaria. 

 Other bivalves found with Mercenaria were not found frequently enough to 

 demonstrate definite relationships. In traps containing various substrate 

 tvpes Mercenaria most frequently colonized those containing sand. Mercenaria 

 were not found in traps at a depth of 2 feet, although all other species 

 were. The authors believed that the most important ecological factors 

 determining bivalve distributions are water circulation, mode of breeding, 

 mode of feeding, and larval behavior. Mercenaria were found only in regions 

 of greatest water movement. This species is a suspension feeder. Salinities 

 in the section of the Pond inhabited by hard clam apparently were usually 

 25.5°/oo or greater. - J.L.M. 



576 



