. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. INHIBITION OF NEMATOCYST DISCHARGE 191 TABLE II Effect of the amount of time elapsed on the total number of Artemia ingested. Error is the mean deviation Feeding regime Number of hydra Average number of shrimp ingested One shrimp at a time Two shrimp, a 1 hour pause, then one shrimp at a time Four shrimp, a 1 hour pause, then one shrimp at a time 1 8 7 7 ± ± ± Fed to repletion, a 2 hour pause, fed again until repletion Fed 6 shrimp, a 2 hour pause, fed until repletion 2 12 14 ± ±
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. INHIBITION OF NEMATOCYST DISCHARGE 191 TABLE II Effect of the amount of time elapsed on the total number of Artemia ingested. Error is the mean deviation Feeding regime Number of hydra Average number of shrimp ingested One shrimp at a time Two shrimp, a 1 hour pause, then one shrimp at a time Four shrimp, a 1 hour pause, then one shrimp at a time 1 8 7 7 ± ± ± Fed to repletion, a 2 hour pause, fed again until repletion Fed 6 shrimp, a 2 hour pause, fed until repletion 2 12 14 ± ± in after feeding for a certain time period, regardless of the number of shrimp ingested. To decide between these alternatives, animals were fed under different regimes in two experiments as shown in Table II. In each experiment, the hydra reached repletion after having ingested a similar number of shrimp even though the total period of time until repletion was reached was different. Thus, the time interval from the onset of feeding to repletion does not play a role. The difference between the two experiments in the total number of shrimp ingested per hydra reflects the day-to-day variability in the number of shrimp a hydra will consume. 0) en ro 4-1 C c/> 0) O) c to E 0) 111 _a E D 100 80 - 60 c O u TJ 03 I 40 en 20. 0,'0 1 2345678 Time after inhibition of stenotele discharge (hr) FIGURE 2. Kinetics of recovery from inhibition of stenotele discharge. The results of two experiments are presented together. Each point is the average of 4-6 hydra. The two curves are the percentage of Artcniin killed (filled circles) and the percentage ingested (open circles) compared to starved 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 Biologi
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
