. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 118 DAVID W. ELVIN 35 30 25 g UJ 520 cr 15 10 0 MAXIMUM EXPOSED!EMP. AVERAGE SUBMERGED \ /'/MINIMUM EXPOSED TEMP. I it I SONDJFMAMJJAS MONTH FIGURE 5. Annual tissue temperatures of sponges showing the average temperature of submerged populations and the maximum and minimum temperatures reached each 15 day period by exposed populations. Average tissue temperatures of the exposed populations were found to be within a degree of the submerged group and are not shown. This data covers the period 1970 to 1971. is no signifi
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 118 DAVID W. ELVIN 35 30 25 g UJ 520 cr 15 10 0 MAXIMUM EXPOSED!EMP. AVERAGE SUBMERGED \ /'/MINIMUM EXPOSED TEMP. I it I SONDJFMAMJJAS MONTH FIGURE 5. Annual tissue temperatures of sponges showing the average temperature of submerged populations and the maximum and minimum temperatures reached each 15 day period by exposed populations. Average tissue temperatures of the exposed populations were found to be within a degree of the submerged group and are not shown. This data covers the period 1970 to 1971. is no significant difference between the average temperatures of the three regimes. As has been shown, the temperatures reached during the period of exposure can be far from those of sea water. The maximum and minimum tissue temperatures attained in each bimonthly period are also recorded in Figure 5. Heating during tidal exposure occurs in late March, and temperature differences of 10° C begin to occur at this time. The minimum temperatures approaching 0° C in January and March should not be neglected in an analysis of the thermal regime. A better indication of the thermal regime can be obtained by calculating the amount of time spent above arbitrary threshold temperatures. Threshold values of 10° and 12° C demonstrated significant annual changes in late March and in late May, respec- tively, for those sponges exposed directly to sunlight. Although maximum exposed temperatures of 32° C were predicted for sponges exposed during the summer, very little time was spent above 14° C. The great variation during late summer and fall reflects intermittent periods of cooler water due to coastal upwelling. Average values for sea water and air temperatures during the years 1971 to 1974 were compared, and it was found that both air and sea water temperatures during February of 1973 were ° to ° C warmer than those of other Please note that these images are extracted from scanned pa
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
