. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. _ 75- *f /° ^ ^ s 1 24 1 T 1 1 48 72 9 Exposure Duration (hours) Figure 2. A. Time course of occurrence of mantle edge exposure behaviorin Cnrhiailariiiinincu under five relative humidity treatments at 25°C. Mantle edge exposure behavior is quantified as in Figure I A. The abscissa! scale is the same as for Figure 2B Sy mbols represent RH: •—75'-. RH:D—53r; RH:C—.W RH:A—<5^ RH. B. Time course of cumulative percent body water lost for a standard si/ed ( mm shell length) Curhunki lliiniim-u under the same five relative
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. _ 75- *f /° ^ ^ s 1 24 1 T 1 1 48 72 9 Exposure Duration (hours) Figure 2. A. Time course of occurrence of mantle edge exposure behaviorin Cnrhiailariiiinincu under five relative humidity treatments at 25°C. Mantle edge exposure behavior is quantified as in Figure I A. The abscissa! scale is the same as for Figure 2B Sy mbols represent RH: •—75'-. RH:D—53r; RH:C—.W RH:A—<5^ RH. B. Time course of cumulative percent body water lost for a standard si/ed ( mm shell length) Curhunki lliiniim-u under the same five relative humidity treatments at 25°(' as in Figure 2 A (sv mbols the same as Figure 2 \) Methods lor calculating curves were the same as in Fig- ure IB. Approximately 9391 of the si/e-walei loss regressions were sig- nificant (P < ). Declines in cumulative water lost were due to mor- talitv. above, with only single individuals recorded at 53' <. The maximum occurrence was onh MY 5'< RH and less at the lower humidities. The incidences of the beha\ior were reduced during the period of accelerated water loss (sec Fig. 3B). and ceased after 21 hours emersion. At 15°C the pattern of cumulative water loss showed a distinct relative humidity effect (Fig. IB). Cumulative water loss values for 5. 33, and 53' 5' - RH are lower than the other relative humidity treatments. The 75% curse was linear whereas the ''5'! curve showed an initial slow increase |. Jlnwcd b> an acceleration to a higher loss rate later in the experiment. At 25T le\o iier loss (Fig. 2B) were 2-6 times those at I > ss levels for 5-75', RII were ap- proximately linear and lustered together. At no time during the experiment • m\ significant difference (P > (found in water loss Ivtwcen the relative humidiu treatments. Cumulative water loss lmm clams at 35°C (Fig. 3B) was 2-3 limes the 25"( values. \\ alei loss was similar for all rclatne humidities and no significant differences (P &
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
