105 



Hidu, Herbert. 



1969. 



The feasibility of oyster hatcheries in the Delaware-Chesapeake 



Eay region. 



Kent S. Price, Jr., and Don L. Maurer, editors. Proceedings, 



Conference on Artificial Propagation of Commercially Valuable 



Shellfish, Oysters, Oct. 22-23, 1969, Univ. Del., Coll. Mar. 



Studies, pp. 111-131. 



Feasibility is examined from the biological, economic, and 



socio-political viewpoints. The emphasis is on research progress 



on the biological systems in a hatchery (conditioning and 



spawning, larval rearing, and spat rearing) and on experimental 



progress on biological hatchery production costs. Some paradoxes 



are raised. The region provides an excellent growth medium, but 



natural seed has sometimes not been fully utilized. Private 



growers and public-agency buyers who were guestioned indicated 



unwillingness to pay more than the price of natural seed, with 



some oyster grounds going unworked for lack of seed. Since the 



estimated cost of hatchery seed is 3 to 7 times the price of 



natural seed, hope for its use is seen only via further research 



and experimental work to reduce production costs. 



Socio-political factors affecting possible use of hatchery seed 



are discussed briefly. 



Subject descriptors: 



Oysters; hatcheries; R&D role; problems. 



106 



MacKenzie, Clyde L., Jr. 



1970. 



Oyster culture modernization in Long Island Sound. 



Amer. Fish Farmer World Aquacult. News 1(6) : 7-10. 



Increased oyster seed productivity in Long Island Sound is 



discussed. This is the result of improved equipment, control of 



major causes of mortality, better preparation of oyster-setting 



beds, and production of oyster seed from hatcheries. Techniques 



of seeding beds, controlling predators (common starfish and 



boring snail), and controlling suffocation by silt are explained. 



Yields obtained by oyster companies today have increased from 



about 1 to 10 or more bushels of oysters from 1 bushel of young 



seed oysters. Greater production of better quality oysters is 



forecasted . 



Subject Descriptors: 



Oysters; ground culture; biology; general description; government 



assistance . 



48 



