. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OSMOTIC REGULATION IN THALASSINIDS 119 between top and bottom salinities (Burt and McAlister, 1959) and a progressive drop in salinity further up the bay and river system (Frolander, 1964). Quite probably, therefore, animals further up the estuary experience lower salinities than those shown in Figure 1. Burrow, interstitial and shore water samples (the latter taken at water's edge during ebb tide) were taken periodically from Newport collecting localities during summer, 1966, and salinities determined. Results indicate that
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OSMOTIC REGULATION IN THALASSINIDS 119 between top and bottom salinities (Burt and McAlister, 1959) and a progressive drop in salinity further up the bay and river system (Frolander, 1964). Quite probably, therefore, animals further up the estuary experience lower salinities than those shown in Figure 1. Burrow, interstitial and shore water samples (the latter taken at water's edge during ebb tide) were taken periodically from Newport collecting localities during summer, 1966, and salinities determined. Results indicate that without exception resident populations of thalassinids experienced 100% SW during the summer months. On March 11, 1967, following a period of rainfall, samples were again taken at the same Newport localities. Salinity determinations show (Table I) that both species experience brackish conditions. In addition the salinities of samples taken from the burrows of Upogebia correspond to those of nearby shore water and surface pools, and that in this particular instance, Upogebia experienced relatively more reduced salinity than did Callianassa. Experimental acclimation times Acclimation times were estimated from experiments measuring the time required to achieve a new steady state with respect to Cl". Animals previously acclimated to 100% SW were acutely introduced into 50% SW (Cl~ adjusted to 285 meq/1). Blood Cl" was monitored for a period in excess of 2 days (Fig. 2). Mean values for the blood Cl" of the C. californiensis and U. pugettensis controls kept in 100% SW (Cl~ = 562 meq/1) and sampled at the same time as experimentals are between SOO^A. 200. 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
