Table 5. — Monthly range and mean of total phosphorus in Clear Lake, Tex., 1964- 



Month 



January. . . 

 February . . 



March 



April 



May 



June 



July 



August 



September. 

 October. . . 

 November. . 

 December. . 



Annual. 



1964 



Range 





5.7-12.1 



Mean 



f ig, at. /I . 



10.1 

 9.5 

 8.9 

 9.4 

 8.1 



10.0 

 7.3 



12.1 

 5.7 



9.0 



data ■"■ Single observation 



1965 



Range 



Mean 



f ig, at. /l . 



5.0-10.1 



1.7-15.7 



5.9 

 8.1 

 11.1 

 4.7 

 5.6 

 6.9 

 7.1 

 5.4 

 5.4 

 6.7 

 5.2 

 7.5 



6.9 



1966 



Range 



Mean 



f ig, at. /l . 



1.7- 4.7 



3.1- 7.5 



3.2- 7.4 

 3.3-10.8 



11.6-15.0 

 10.3-26.3 

 13.4-16.9 

 11.2-15.3 

 15.9-21.4 

 13.8-17.7 



1.7-26.3 



12.3 



4.9 

 3.7 



4.7 

 5.7 

 6.2 

 13.0 

 14.8 

 15.2 

 13.4 

 18.8 

 15.7 



9.6 



Table 6. — Monthly range and mean of dissolved oxygen in Clear Lake, Tex., 1964-66 



no data 



Single observation 



trend, but because of wide fluctuations in values 

 within a month and in sampling f r e qu e n c y, 

 these trends are probably not significant. 



LITERATURE CITED 



MARVIN, KENNETH T., ZOULA P. ZEIN- 



ELDIN, BILLIE Z. MAY, and LAURENCE M. 



LANSFORD. 



1960. Chemical analyses of marine and 



estuarine waters used by the Galveston 



Biological Laboratory. U.S. Fish Wildl. 



Serv., Spec. Sci. Rep. Fish. 349, 



iii + 14 pp. 



MOCK, CORNELIUS R. 



1965. Distribution of bottom sediments in 

 Clear Lake, Texas. In Biological Lab- 

 oratory, Galveston, Tex., fishery re- 

 search for the year ending June 30, 1964, 

 pp. 89-92. U.S. Fish Wildl. Serv., Circ. 

 230. 



STEEL, R. G. D., and J. H. TORRIE. 



1960. Principles and procedures of sta- 

 tistics with special reference to bio- 

 logical sciences. McGraw-Hill Book 

 Co., New York, 481 pp. 



MS. #1796 



GPO 8 6 3-5dO 



