New Hampshire 3-31-R William Ayer 



Soft-shell clam population study in Ilampton-Seabrook Harbor. New Hampshire - The feasibility 

 of limited commeraial use of the soft-shell clam is being investigated through 

 studies of seeding, growth, and mortality. About 85 percent of the clam flats in Hampton- 

 Seabrook Harbor have been surveyed. 



New lork 3-11-D Gerald Strobel and James Redman Completed 1966 



Pilot plant depuration of hard clams - A pilot plant to determine whether it is feasible to 

 purify hard clams from moderately polluted waters of Long Ifdand Sound has been built. Evalu- 

 ations were made of various factors. These factors were salinity, tuj;'bidity, temperature, 

 flow rate, recirculation, and dissolved oxygen. that affect the depuration process for the hard 

 clam. 



New York 3-68-D Quentin R. Bennett Completed 1968 



Studies of pro b lems involved when hard clams (Mereenaria mercenaria) in ';--mmercial quantities 

 are sub.iected to the depuration process - A study of the economic feasibility of the depura- 



tion 

 comp. 



Oregon 1-27-R Paul Reed $17,790 



n process for hard-shell clams from moderately polluted areas on Long Island Sound has been 

 completed. 



Laboratory hatching and rearing of Pacific Coast clams and oysters - The development of 

 methods to spawn and rear several species of clams and oysters for planting is the major 

 objective of this study. Growth is being observed from spat grown in the laboratory and 

 placed in Ne tarts and Yaquina Bays. 



Virginia 3-77-R Dexter Haven $30,000 



A study of the soft and hard clam resources of Virginia - The intent cf this research is to 

 evaluate the potential of establishing a soft-shell clam fishery in lower Chesapeake Bay and in 

 the James, York, and Rappahannock Rivers.- Studies are underway with a hydraulic soft-shell 

 clam dredge to determine distribution and abundance, the rate at which the dredged areas will 

 repopulate, and the effect of dredging on the substrate. 



Washington 1--C2-D Ronald Westley $37,303 



Subtidal hard-shell clam fisheries investigations - Underwater surveys are made to investi- 

 gate the presence of clams in Puget Sound and the Strait of Juan de Fuca. Commercial 

 quantities have been found in about half of the ^1 acres surveyed. Industry, the Bureau of 

 Commercial fisheries, ajid the State are cooperating in the development of an efficient har- 

 vesting method. 



Crabs : 



Alaska 5-10-R . - Carl W. Lehman $25,000 



Dungeness crab research in southeastern Alaska - A tag and recovery project is underway in 

 Duncan Canal near Petersburg to observe growth per molt and migratory behavior of dungeness 

 crab. Size at sexual maturity is investigated.' Also, SCUBA gear is being used to observe 

 the effect that log rafting areas have on crab population's. Knowledge of dungeness crab 

 biology and life history is increasingly needed to manage the expanding fishery. 



Alaska 5-11-R John C. McMullen $/i^,300 



Reproduction of king crabs (Paralithodes camtschatica) in the Kodiak Island area - This 

 project is undertaken to delineate spawning areas of king crab, both offshore and inshore of 

 Kodiak Island. A sampling program is established to determine size of sexual maturity of 

 male crabs from various areas and to observe other life history and biological character- 

 istics of both larval and adult crabs. 



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