. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ZOOPLANKTON IN A TIDAL ESTUARY 221 The change in numbers in an isolated parcel of water may be represented by (3) (Co)e*' = Ctt in which C0 is the initial concentration of the organism and Ct the concentration after t tidal cycles. The value of ek determined from equation (3) will be called the "production rate," in distinction from the value obtained from equation (2) which is referred to as the replacement rate. When applied to the numbers of some particular stage in the life history of an organism, as in the pre
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ZOOPLANKTON IN A TIDAL ESTUARY 221 The change in numbers in an isolated parcel of water may be represented by (3) (Co)e*' = Ctt in which C0 is the initial concentration of the organism and Ct the concentration after t tidal cycles. The value of ek determined from equation (3) will be called the "production rate," in distinction from the value obtained from equation (2) which is referred to as the replacement rate. When applied to the numbers of some particular stage in the life history of an organism, as in the present case, these production rates are not, of course, true a: UJ tj o m o CO o UJ Q. O O <r 5 10,000 LJ O o o § Q. £0 1,000 T T. 0 08 04 02 + 0 02 04 06 08 30 20 10 500 1000 1500 DISTANCE, METERS 2000 2500 O •0 8 O 9 o o O REPLACEMENT COEFFICIENT • PRODUCTION COEFFICIENT 30 20 MEAN SALINITY %« 10 FIGURE 5. Distribution of Acartia tonsa copepodids (above) and replacement and pro- duction coefficients for Acartia tonsa copepodids (below). Replacement coefficients calculated from distributions of June 30 and July 10, 1950. Natural logarithms of replacement rates, ck, plotted against mean salinity in tidal excursion segments. Production coefficients calculated from bottle experiments of June and July, 1951. Natural logarithms of production rates, ek, plotted against salinity in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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