768 



Hanks, Robert W. 196 8. 



Benthic community formation in a "new" marine environment. Chesapeake Sci. 

 9(3) : 163-172. 



769 



Hanlon, David P. 1975. 



The distribution of arginase and urease in marine invertebrates. Comp. 

 Biochem. Physiol. 52 (2B) : 261-264. 



Six specimens of Meraenaria meraenaria in 4 trials produced an average of 0.3 

 y Moles of ornithine/hr (range to 1.0) from the hepatopancreas. This was 

 the lowest arginase level found in 15 species of coelenterate, brachiopod, 

 mollusk, arthropod, and echinoderm. Highest arginase activity was found in 

 Crustacea. In 3 separate tests of 4 M. meraenaria each, 4 trials in each 

 test, hepatopancreas produced 5.7 (range 5.4 to 6.0) y Moles of NH3/g/hr, 

 mantle 19.2 (19.0 to 19.4), and gills 29.2 (28.6 to 29.6). With the exception 

 of the brachiopod Lingula and gastropods Littorina and Busy aon , these were the 

 highest urease activities found in the same 15 species. Meraenaria , with 

 significant levels of urease, did not excrete urea in detectable amounts. 

 - J.L.M. 



770 



Hanlon, David P., Lois Lane, and Ancil Jones. 1969. 



Comparative aspects of molluscan enolases. Am. Zool. 9(3): 582 (abstract 212). 



The enzyme enolase (2-phospho-D-glycerate hydro-lyase, EC 4.2.1.11) catalyzes 

 one reversible step in the glycolytic pathway, and therefore is ubiquitous in 

 plants and animals. Thus, enolase might be a useful probe for studies in 

 comparative enzymology. Chemical and physical investigations were made of 

 enolases of 3 pelecypods, including Meraenaria meraenaria. Incubation of 

 enzyme with p-chloromercuribenzoate (p-CMB) , a sulfhydryl group reagent, 

 inhibited enolase from 2 species but had no effect on hard clam enolase. 

 Apparently, mutations have given rise to enolases structurally dissimilar in 

 certain regions. Other evidence showed that little if any change occurred at 

 the catalytic site. - J.L.M. 



771 



Hanna, G. Dallas. 1966. 



Introduced mollusks of western North America. Occas. Pap. Calif. Acad. Sci. 

 7(48) : 1-108. 



Records of Venus (Meraenaria) meraenaria on the west coast date back to 1901. 

 These were dead valves, hence not proof that the species was established. A 

 living specimen was reported from the San Francisco region in 1940. An 

 attempt was made to plant the species in Newport Bay, Calif., in 1940, but 

 this apparently failed. An unrecorded planting in Humboldt Bay, Calif, was 

 obviously successful because a bed of living hard clams exists there. In 

 1956 small experimental plantings were made in Drake's Estero and Tomales 

 Bay, Calif. A small planting was made in Catalina Harbor, Calif, in 1959. 

 Bat rays are supposed to have destroyed these 3 plantings. The California 

 Dept. of Fish and Game made plantings in Humboldt Bay in 1960, in Drake's 

 Estero and Tomales Bay in 1963, and in Morro Bay, Drake's Estero, and Tomales 

 Bay later in 1963. Survival is reported from the 1960 and first 1963 

 plantings. Another planting was made in San Francisco Bay in 1963. 

 Experiments to establish the species in Puget Sound, Washington were confined 

 to the laboratory up to Sept. 1963. - J.L.M. 



214 



