. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TEMPERATURE REGIME IN POMACEA 309 T GROUND 10cm. SURFACE 2cm IM 6 cm M 2 T6 FIGURE 3. The position of a female Pomacca nrcciis (stylized shell) with eggs during aestivation in the field. Ti to T0 (°C) are reference points for temperatures given in Table I and correspond to shaded air, ground surface, soil (10 cm depth) about 25 cm from snail, exposed shell surface, soil beneath snail, and body core temperature respectively. Mi, M2, and M3 are reference points for the soil moisture content values of Table I. The depths, shell
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TEMPERATURE REGIME IN POMACEA 309 T GROUND 10cm. SURFACE 2cm IM 6 cm M 2 T6 FIGURE 3. The position of a female Pomacca nrcciis (stylized shell) with eggs during aestivation in the field. Ti to T0 (°C) are reference points for temperatures given in Table I and correspond to shaded air, ground surface, soil (10 cm depth) about 25 cm from snail, exposed shell surface, soil beneath snail, and body core temperature respectively. Mi, M2, and M3 are reference points for the soil moisture content values of Table I. The depths, shell, and eggs are drawn to scale. TABLE I Temperature and moisture regimes for Pomacea urceus during aestivation in the savannah. perature (°C—T\ to JT6) and soil moisture content (weight ratio—M\ toM-.\\ values correspond to the reference points of Figure 3 Tern- Morning (8:15-9:30) Mid-day (12:30-14:45) May 2. 1970 May 1, 1970 ±95% ±95% Range Mean confidence Range Mean confidence limits limits Tj ± ± T2 ± ± T3 ± ± T4 ± ± T5 ± ± T6 ± ± Mi 40-50 ± 25-78 ± M2 50-80 ± 55-82 ± M3 69-74 ± 49-84 ± Values for temperatures and soil moisture near I'oinacca urceus aestivating in the savannah are given in Table I for the reference points of Figure 3. Measure- ments were taken on seven snails (mean shell length, mm ± ) during the morning and on nine snails (mean shell length, mm ± ) dur- ing the afternoon. Adult snails normally aestivate with a small patch of shell surface exposed (Fig. 3), and the hard-baked ground has small cracks which ap-. Please note that these images are extracted from scanned page images that
Size: 1536px × 1627px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
