. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 3. Scanning electron micrographs of radulae from Euhniiu'lHis i:\iguus (size = 4 mm) (a. b) and Tergipes tergipes (size = 4 mm) (c, d, e) from a dorsal (a, c) and lateral (h, d, e) view. Scale bars: a, b, c, d = 10 nm, e = 15 urn. (d = denticles. L = lateral teeth, R = rachidian tooth.) When feeding on gonangia, the nudihranchs plucked in- dividual, juvenile medusae from the bottom of the gon- otheca. On stolons, tissue was extracted by a few, quick pulses of the buccal apparatus. Dendronotus frondosus individuals gre
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 3. Scanning electron micrographs of radulae from Euhniiu'lHis i:\iguus (size = 4 mm) (a. b) and Tergipes tergipes (size = 4 mm) (c, d, e) from a dorsal (a, c) and lateral (h, d, e) view. Scale bars: a, b, c, d = 10 nm, e = 15 urn. (d = denticles. L = lateral teeth, R = rachidian tooth.) When feeding on gonangia, the nudihranchs plucked in- dividual, juvenile medusae from the bottom of the gon- otheca. On stolons, tissue was extracted by a few, quick pulses of the buccal apparatus. Dendronotus frondosus individuals greater than 5 mm were polyp biters or grabbers. The nudibranchs would crawl up a hydrocaulus and lightly contact the tentacles of an exposed hydranth with the anterior portion of the foot and mouth. Both suctorial and grasping mechanisms were used to consume polyps. Although the radula was everted from the mouth, it did not contact a polyp (n = 14). As buccal activity created a suction that pulled the polyp towards the nudibranch's mouth, the jaws were protruded, and the polyp was clipped off at its base leaving only the annuli. A nudibranch would continue in this manner along a hydrocaulus following the alternating pattern of polyp branching, feeding at a rate of 1-2 polyps per minute over a 5-min observation period (n = 6). Doto coronata was a suctorial feeder preying predom- inantly on the stolons of Obelia geniculata. The nudi- branch clutched a stolon with the anterior portion of the foot to bring the mouth against the stolon. The anterior portion of the foot flattened against the stolon during buccal activity, suggesting that the nudibranch was ex- erting additional pressure to assist in penetration. When a hole was produced through the perisarc, coenosarc was drawn into the animal's mouth. Tissue moved unidirec- tionally toward the mouth of the nudibranch in pulses that coincided with pulses of the buccal apparatus. Perisarc was penetrated by rasping with the radula. Drill
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
