. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 414 DARKY 1. L. J-KLDKK 1200 Q 1000 o 3 m - 300 en UJ en 600 O 400 200. 35 % 200 400 600 800 1000 1200 MILLIOSMOLES, MEDIUM FIGURE 1. Blood osmotic concentration in acclimated C. nnijor (solid circles) and C. islayrundc (open circles) as a function of media osmotic concentrations. Each large solid circle is mean of 6 to 10 determinations; vertical lines indicate range ; open circles and small solid circles are individual determinations. Heavy line is fitted to points for C. innjur. Asterisk denotes juveniles. and branchioste
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 414 DARKY 1. L. J-KLDKK 1200 Q 1000 o 3 m - 300 en UJ en 600 O 400 200. 35 % 200 400 600 800 1000 1200 MILLIOSMOLES, MEDIUM FIGURE 1. Blood osmotic concentration in acclimated C. nnijor (solid circles) and C. islayrundc (open circles) as a function of media osmotic concentrations. Each large solid circle is mean of 6 to 10 determinations; vertical lines indicate range ; open circles and small solid circles are individual determinations. Heavy line is fitted to points for C. innjur. Asterisk denotes juveniles. and branchiostegites which, by restricting movement and ventilation, probably caused respiratory stress. Those which survived low-salinity acclimation increased in weight initially, but began to regulate volume within three days; by the fourth day to ninth day of acclimation, wet weights returned to near original values. Osmotic and ionic regulation Blood of C. major and C. islagrandc is nearly isosmotic to media over the entire salinity range in which these animals survive (Fig. 1). Slightly hyper- osmotic values obtained for C. major at S'/,< salinity represent a low percentage of animals which survived at that extreme. Likewise, hyperosmotic values for C. islagrandc at low salinities are from two juveniles which survived while nine adults died at these salinities. Blood of C. jainaiccnsc is hyperosmotically regulated at salinities < 20'/,f and shows little depression of osmolality at the lowest salinity extreme of 2'/<, (Fig. 2). Slightly higher levels of hvperosmicity are maintained by January animals col- lected from a field salinity of \\'/« and temperature of 8° C than by August animals collected from 23'/ 25'/f,f> and very slightly hyposmotic at the upper-salinity extreme of 45'/<. 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 perfect
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
