. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NEUROPHYSIOLOGICAL RESPONSES TO LIGHT IN A SEA ANEMONE 199. SI S5 S4 S3 S2a S2b A5 A4 A3 A: Al Figure 4. Averages of burst frequency in SSI of 10 specimens of Anthopleura elegantissima during the BD, D, and AD intervals. The anemone in which there is a significant difference in activity in SSI is shown in the top portion of the figure, whereas anemones in which there is not a significant difference in activity in SSI are grouped together in the bottom portion of the figure. Zooxanthellate (S) anemones are in- dicated by soli
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NEUROPHYSIOLOGICAL RESPONSES TO LIGHT IN A SEA ANEMONE 199. SI S5 S4 S3 S2a S2b A5 A4 A3 A: Al Figure 4. Averages of burst frequency in SSI of 10 specimens of Anthopleura elegantissima during the BD, D, and AD intervals. The anemone in which there is a significant difference in activity in SSI is shown in the top portion of the figure, whereas anemones in which there is not a significant difference in activity in SSI are grouped together in the bottom portion of the figure. Zooxanthellate (S) anemones are in- dicated by solid lines, and apozooxanthellate (A) anemones are indicated by dashed lines; numbers denote individual specimens. Standard errors are not shown, but range from 2 to 100% of the means. on burst rate did show correlation in activity among all three conducting systems. This anemone (Al) and the anemones S3 and S5 were the only individuals that showed correlation in activity among all the conducting systems. Discussion Because we never observed pulses in the ectodermal SSI of Anthopleura elegantissima in response to a light- dark change, our results support the endodermal locus of the light response noted by Batham and Pantin (1950a, 1954) and by Marks (1976) in other species of anemones. McFarlane (1983) noted that SSI is not spontaneously active in C. parasitica. This observation also pertains to A. elegantissima, where SSI pulses were rare (Fig. 4). The number of recorded SS1 pulses may even have been ar- tifactually high owing to the recording method, because some pulses recorded by only one electrode were classified as SSI. Because SSI is not spontaneously active in A. elegantissima and is not activated by a change in irradi- ance, the ectoderm is probably not the site of photore- ception in this sea anemone. When the change in irradiance causes contraction in the anemones, the conducting systems could be involved in three ways: (1) the frequency of activity would increase in th
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
