. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EYE AND CNS IN SAGITTA PHOTOTAXIS 87. FIGURE 3. Examples of profiles of Sagilta showing QTA responses (a and b), ST response (c) and passive sinking (d). The target light source was to the right. Scale bars indicate cm. a: The bending profile of stroke to the left is followed by gliding profiles with horizontal dorso-ventral plane, b: Passively sinking worm to the left points to the right with a bending profile in the middle, c: Three shots to the left and five in the middle show lateral profiles and three to the right s
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EYE AND CNS IN SAGITTA PHOTOTAXIS 87. FIGURE 3. Examples of profiles of Sagilta showing QTA responses (a and b), ST response (c) and passive sinking (d). The target light source was to the right. Scale bars indicate cm. a: The bending profile of stroke to the left is followed by gliding profiles with horizontal dorso-ventral plane, b: Passively sinking worm to the left points to the right with a bending profile in the middle, c: Three shots to the left and five in the middle show lateral profiles and three to the right show oblique ones, d: The dorso- ventral plane is more or less horizontal in the uppermost profile and vertical in the lowest profile. whereby the animals were accumulated in one end of the trough opposite to the target by their ST movements. Effect of selective microcauterization Behavioral results obtained with the worms which were cauterized in varying ways are summarized in Table II and light micrographs of the cauterized eye regions are shown in Figure 4. Nine out of 10 of the intact control worms which recovered from anesthetization (Fig. 4a) showed both types of normal response. One worm failed to show QTA. Hence the eugenol exposure was without significant aftereffect. Sham control experiments were made by cauterizing the epidermis covering the area between the two eyes (Fig. 4b). Though some of the microcauterized worms became unresponsive, more than 60% of the 18 worms concerned responded normally (b in Table II). Considering the delicacy of their body structure, the ability of Sagitta to retain responsiveness after local cauterization may be considered high. Worms in which one eye (d in Fig. 4 and Table II) and some of the epidermis above it (c in Fig. 4 and Table II) were cauterized resembled the sham control worms in their responses. Cauterization at two sites (e in Fig. 4 and Table II) increased the number of unresponsive worms, but only when both eyes were complet
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
