. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OSMOTIC REGULATION IN SHRIMPS 565 RESULTS Juvenile and subadult aztccus and du-oraniin are hypotonic to sea water in a salinity range of 30-34/ir in summer in a temperature range of 23-31° C. This was shown by a comparison of the melting points of blood from shrimps and water taken from outside holding tanks at the inception of each weekly experiment. This find- ing is in accord with the account for a number of decapod crustaceans (supra cit.). Results of six weekly experiments on aztccus ranging in total length from 42-100
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OSMOTIC REGULATION IN SHRIMPS 565 RESULTS Juvenile and subadult aztccus and du-oraniin are hypotonic to sea water in a salinity range of 30-34/ir in summer in a temperature range of 23-31° C. This was shown by a comparison of the melting points of blood from shrimps and water taken from outside holding tanks at the inception of each weekly experiment. This find- ing is in accord with the account for a number of decapod crustaceans (supra cit.). Results of six weekly experiments on aztccus ranging in total length from 42-100 mm. are shown in Figure 2. Though shrimp in high salinity water prior to experi- ment are hypotonic, they are hypertonic to hypotonic in the array 10-30/£0 after 2-3 hours of immersion in the mixtures at a mean room temperature of ° C., those in the low salinities having more dilute blood than those in high salinities, for the line is not horizontal (b == .347). At the end of 48 hours, with an accompanying drop in temperature to ° C., essentially the same relationship exists though blood in low salinities is even more dilute (b — .464). Controls at room tempera- ture ° C. show a somewhat similar picture (b == .512). At the end of 96 hours Salinity in %0 •Y C •a o ffl - o c o °- c I .9. Contr. at °C. 48 Hr. Exp. •• I •• • • 28-8 O _ _» 7 « _ f .6 .8 Melting Point of Water in —°C. FIGURE 2. Pcnacus actccits, 42-100 mm. total length. Regression lines drawn average melting points of blood at average melting points of water of —, — and —° C. Key to lines on figure. through , ,. 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 perfe
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
