. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DISCONTINUOUS INSECT RESPIRATION 299 TABLE III Average intratracheal vacuum (mm Hg ± s. e.) developed during microcycles in different parts of the flutter period Part of flutter period Temperature (°C) Beginning Middle End 20 * ± ** ± ± ( to )t ( to ) ( to ) 15 ± ± ( to ) ( to ) ( to ) 10 ± ± ± ( to ) ( to ) ( to ) 5
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DISCONTINUOUS INSECT RESPIRATION 299 TABLE III Average intratracheal vacuum (mm Hg ± s. e.) developed during microcycles in different parts of the flutter period Part of flutter period Temperature (°C) Beginning Middle End 20 * ± ** ± ± ( to )t ( to ) ( to ) 15 ± ± ( to ) ( to ) ( to ) 10 ± ± ± ( to ) ( to ) ( to ) 5 ± ( to ) ( to ) ( to ) 0 ± ± ( to ) ( to ) ( to ) -5 ( to ) * Each average figure is based on a total of 30 microcycles (ten from each of 3 cycles) from records of one pupa. ** S. D. f Figures in parentheses indicate ranges of microcycles examined. If Based on all microcycles recorded. a (- ^_. 4 300 D 44000 1 7 - E p — _i_ /--- +Tl J-l j : / . / . J - i ' 'l - •- \+ L_ •4 t= T J s — j ; ; £ t 1 t 45000 46000 47DOO / — - fr^"i^ J u f^— -i. j ' i (- 1- - _r.: p^, — ^-^_L,r - -j" i 1 3 1 [ , i ^ -r^r- ^ h~i — — ' 1 E — i , i i i S ! j j : ~* t ' 46OOO FIGURE 2. Intratracheal pressure record of pupa II at 0° C. Since this particular cycle lasted 28 hours, only a portion of the flutter period immediately preceding the burst is shown. The chart speed in this and subsequent records was mm/sec unless otherwise indicated. Thus one small division between two thin vertical lines on the chart represents 20 seconds, and one large division between two heavy vertical lines represents 100 seconds. Recordings in this and other intratracheal pressure records were made at a sensitivity of Please note that these images are extracted from scanned page images that may have been digitall
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
