. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1995. Pulmonary Arterial Hemolymph Venous Figure 4. The hemolymph pH of pulmonary, arterial, and venous samples taken from Gecarcoidea natalis during two migration seasons. 1993 (top panel) and 1995 (bottom panel). Morning and afternoon groups were sampled during both migration seasons (n = 5 in 1993; n = 9 in 1995). Top panel (1993 season) also includes measurements of hemolymph pH in crabs sampled 1 week prior to the start of the migration (pre-mig n = 12). The * symbol next to the legend indicates a significant difference
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1995. Pulmonary Arterial Hemolymph Venous Figure 4. The hemolymph pH of pulmonary, arterial, and venous samples taken from Gecarcoidea natalis during two migration seasons. 1993 (top panel) and 1995 (bottom panel). Morning and afternoon groups were sampled during both migration seasons (n = 5 in 1993; n = 9 in 1995). Top panel (1993 season) also includes measurements of hemolymph pH in crabs sampled 1 week prior to the start of the migration (pre-mig n = 12). The * symbol next to the legend indicates a significant difference between the AM and the PM groups. The "R" denotes a significant difference from the crabs at rest—that is, from the resident pre-mig crabs. than in all the other groups sampled in that season. In contrast, during the 1995 migration season, both the return- ing male and female crabs had a significantly higher amount of water in muscle tissue () than the crabs sampled during the downward migration (days 5-7; range ). The percentage of water in the MGG was more variable and significantly lower than in the muscle tissues, with a mean of ± during the 1993 migration and ± in 1995. Crabs that did not participate in the 1995 migration were unusual in that water constituted only ± of their midgut gland. The osmotic pressure of the hemolymph was more vari- able than the percentage of water in the muscle tissue. The osmotic pressure in the hemolymph of the AM and PM groups on any one day was the same, and thus the data for each day were pooled for further analysis. The hemolymph osmotic pressure was largely constant during the downward migra- tion of both the 1993 (771 ± 3 mOsm) and 1995 (803 ± 4) seasons; but in 1993 the osmotic pressure of crabs during the downward migration was significantly lower than that of the pre-mig crabs (815 ±7 mOsm) and the returning fe- males (869 ± 14 mOsm). Additionally, in both 1993 and
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
