THE EFFECTS OF DESIGN AND OPERATION ON THE EFFICIENCY OF HOSEPIPES AS WATER COLUMN SAMPLERS FOR PHYTOPLANKTON

REFERENCES

• ASHTON , P. J. 1981 . Nitrogen fixation and the nitrogen budget of a eutrophic impoundment. . Wat. Res. , 15 : 823 – 833 .
   Web of Science ®Google Scholar
• CASELLA , G. 1983 . Leverage and regression through the origin. . Amer. Stat. , 37 : 147 – 152 .
   Google Scholar
• FEE , E. J. 1976 . The vertical and seasonal distribution of chlorophyll in lakes in the Experimental Lakes Area, northwestern Ontario: Implications for primary production estimates. . Limnol. Oceanogr. , 21 : 767 – 783 .
   Web of Science ®Google Scholar
• GOLTERMAN , H. L. and CLYMO , R. S. 1971 . Methods for Chemical Analysis of Fresh Waters, , 2nd Edn , IBP Handbook No. 8 Oxford : Blackwell Scientific Publications .
   Google Scholar
• LEWIS , W. H. Jr. and SAUNDERS , J. F. 1979 . Two new integrating samplers for zooplankton, phyto-plankton and water chemistry. . Arch. Hydrobiol. , 85 : 244 – 249 .
   Google Scholar
• LUND , J. W.G. , KIPLING , C. and LE CREN , E. D. 1958 . The inverted microscope method of estimating algal numbers and the statistical basis of estimations by counting. . Hydrobiologia , 11 : 143 – 170 .
   Google Scholar
• LUND , J. W.G. and TALLING , J. F. 1957 . Botanical limnological methods with special reference to the algae. . Bot. Rev. , 23 : 489 – 583 .
   Web of Science ®Google Scholar
• MARKER , A. F.H. 1972 . The use of acetone and methanol in the estimation of chlorophyll in the presence of phaeophytin. . Freshwat. Biol. , 2 : 361 – 385 .
   Google Scholar
• NICHOLLS , K. H. 1979 . A simple tubular phyto-plankton sampler for vertical profiling in lakes. . Freshwat. Biol. , 9 : 85 – 89 .
   Google Scholar
• NIE , N. H. , HALL , C. H. , JENKINS , J. G. , STEINBRENER , K. and BENT , D. H. 1975 . Statistical Package for the Social Sciences (2nd Edn) New York. : McGraw-Hill .
   Google Scholar
• NUSCH , E. A. 1980 . Comparison of different methods for chlorophyll and phaeopigment determination. . Arch. Hydrobiol., Ergeb. Limnol. , 14 : 14 – 36 .
   Google Scholar
• PLATT , T. 1975 . Analysis of the importance of spatial and temporal heterogeneity in the estimation of annual production by phyto-plankton in a small, enriched, marine basin. . J. Exp. Mar. Biol. Ecol. , 18 : 99 – 110 .
   Google Scholar
• ROBARTS , R. D. and ZOHARY , T. 1984 . Microcystis aeruginosa and underwater light attenuation in a hypertrophic lake (Hartbeespoort Dam, South Africa). . J. Ecol. , 72 : 1001 – 1017 .
   Web of Science ®Google Scholar
• SOLOMON , K. R. , SMITH , K. and STEPHENSON , G. L. 1982 . Depth integrating samplers for use in limno-corrals. . Hydrobiologia , 94 : 71 – 75 .
   Google Scholar
• WAITE , S. W. and O'GRADY , S. M. 1980 . Description of a new submersible filler-pump apparatus for sampling plankton. . Hydrobiologia , 73 : 187 – 191 .
   Google Scholar
• WALMSLEY , R. D. and BUTTY , M. 1980 . The limnology of some selected South African impoundments Pretoria. : Water Research Commission .
   Google Scholar
• WETZEL , R. G. and LIKENS , G. E. 1979 . Limnological analyses Philadelphia. : W.B. Saunders .
   Google Scholar
• ZAR , J. H. 1974 . Biostatistical analysis New Jersey. : Prentice-Hall .
   Google Scholar