. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1125 1050 975 900 825 750 675 600. 0 10 20 30 40 50 Frequency (mHz) 60 0 10 20 30 40 50 Frequency (mHz) 60 Figure 10. Contour plot, based on the time-series data presented in Figure 6, of sliding window spectral analysis of the isolated polyp for length from (a) 1 to 600 min. and (b) 601 to 1200 min, and for volume from (c) 1 to 600 min, and (d) 601 to 1200 min after ingestion. Abcissa represents frequency of oscillation, ordinate represents the sliding window of time (in minutes), and contour lines represent the height of p
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1125 1050 975 900 825 750 675 600. 0 10 20 30 40 50 Frequency (mHz) 60 0 10 20 30 40 50 Frequency (mHz) 60 Figure 10. Contour plot, based on the time-series data presented in Figure 6, of sliding window spectral analysis of the isolated polyp for length from (a) 1 to 600 min. and (b) 601 to 1200 min, and for volume from (c) 1 to 600 min, and (d) 601 to 1200 min after ingestion. Abcissa represents frequency of oscillation, ordinate represents the sliding window of time (in minutes), and contour lines represent the height of peaks (coming out of the page) that signify the relative importance of a given frequency underlying the cyclic behavior. phase relationships. Taddei-Ferretti and Cordelia (1976) have shown that contraction pulses can be experimentally annihilated in the predicted fashion. It is conceivable that feeding annihilates contraction pulses and, similarly, that the contraction pulses which reappear in phase 3 annihilate digestive oscillations by this mechanism. Phase 3 is terminated at comparable times in both the isolated and coupled treatments by regurgitation through the mouth, followed by a return of length and volume to values characteristic of pre-feeding conditions. The dynamics of regurgitation differ between isolated and coupled polyps (c/ Figs. 2B and 6B). Whereas regurgitation in the coupled case is not a conspicuous feature of either the length or volume record, regurgitation in isolated polyps is abrupt. The iso- lated polyp exhibits several rapid, large contractions in length and an associated decline to half of its previous volume. Coupled polyps regurgitate less material that ap- pears more finely paniculate, whereas the contractions of isolated polyps are associated with the export of larger pieces of undigested debris. We attribute the differences between treatments in the behavior of polyps and the nature of the material regurgitated to the vastly larger colonial gast
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
