. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 278 JAMES EDWARD HEATH AND ROBERT K. JOSEPHSON TABLE I Duration and conditions during singing activity by N. robustus Animal Range of call duration Sum of call periods (N) calls Time EST Date Air temp °C A 37"- 9'27" 38'26" 7 7:06-10:05 8/13 B 5'00"-51'42" 70'09" 5 7:13- 8:23 8/15 21° C 9'59"-32'37" 53'45" 3 7:38- 8:39 8/15 21° D 39'26" 39'26" 1 8:01- 8:40 8/23 23° E 3'00"-68'19" SO'll" 4 7:20- 8:45 8/23 23° X 37"-68'19" 56'25" 20 Cooling. A
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 278 JAMES EDWARD HEATH AND ROBERT K. JOSEPHSON TABLE I Duration and conditions during singing activity by N. robustus Animal Range of call duration Sum of call periods (N) calls Time EST Date Air temp °C A 37"- 9'27" 38'26" 7 7:06-10:05 8/13 B 5'00"-51'42" 70'09" 5 7:13- 8:23 8/15 21° C 9'59"-32'37" 53'45" 3 7:38- 8:39 8/15 21° D 39'26" 39'26" 1 8:01- 8:40 8/23 23° E 3'00"-68'19" SO'll" 4 7:20- 8:45 8/23 23° X 37"-68'19" 56'25" 20 Cooling. At the end of an active period the thoracic temperature returns to ambient levels. The cooling rate is approximately linear with temperature gradi- ent and is thus passive or Newtonian (Fig. 5). The cooling curve can be used to estimate heat loss in a given gradient or heat production if the body temperature is constant. Behavioral studies This phase of the study was intended to determine the thermal limits of activity and to locate reliable behavioral estimates of the temperature tolerance 20 Ambient Temperature (°C) 25 30. - 750 - 500 - 250 TB-TA (°C) FIGURE 5. Cooling curve of the thorax plotted as a rate of change of temperature (left axis) against gradient (bottom axis). A line passing through zero is fitted by eye to the points. If the insect maintains a thoracic temperature of ° during singing and temperature change is converted to heat production (right axis), then the line is an estimate of the expense of singing at decreasing ambient temperatures (upper axis). (See discussion for further explanation.). 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. ). Annual report 1907/08-1952; Lillie, Fr
Size: 1885px × 1326px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
