SEA-WATER SYSTEM AT POINT WHITNEY SHELLFISH LABORATORY 



153 



quality could be improved by means of a 

 floating intake line positioned so as to 

 pump water from the surface layer where 

 water productivity is highest. Several 

 difficult physical problems must be solved 

 before this method would be satisfactory 

 for our location, and as yet this component 

 has not been built. 



CONCLUSIONS 



The sea-water system at the Point Whit- 

 ney laboratory has provided satisfactory 

 service when operational factors of this 

 location are considered. Preventive main- 

 tenance by skilled personnel is a critical 

 factor in maintaining this or any other 

 sea-water system in continuous year-round 

 operation. It is clear to us that a dual 



system using present-day nontoxic plas- 

 tics would probably be more dependable, 

 lend itself more readily to preventive 

 maintenance, and be definitely easier to 

 keep free of fouling organisms, than our 

 present system. Inasmuch as funds are 

 not likely to be available for the complete 

 rebuilding of the system, modifications of 

 the present system must be carefully en- 

 gineered to utilize existing equipment so 

 far as possible. 



LITERATURE CITED 



Westley, Ronald E. 

 1956. Retention of Pacific oyster larvae in an 

 inlet with stratified waters. Washington 

 Department of Fisheries, Fishery Research 

 Papers, vol. 1, No. 4, pp. 25-31. 



