. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 64 KENNETH P. SEBENS 006 004 0006 A A xonthogrommico 0 "d B. A_- elegontissimc C. M_ senile . 001 2 46 01 Q2 04 06. FIGURE 6. Weight of naturally occurring prey (Wp) in coelenteron contents plotted against mean individual dry weight (Wd, grams) for each size class of anemone. Regression lines and coefficients of determination (R2) calculated from double logarithmic transforms. Numbers in parentheses are 95% confidence limits for the exponent of Wd. A. A. xanthogrammica. Wp is dry weight (g) of mussel tissue Wp = 0
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 64 KENNETH P. SEBENS 006 004 0006 A A xonthogrommico 0 "d B. A_- elegontissimc C. M_ senile . 001 2 46 01 Q2 04 06. FIGURE 6. Weight of naturally occurring prey (Wp) in coelenteron contents plotted against mean individual dry weight (Wd, grams) for each size class of anemone. Regression lines and coefficients of determination (R2) calculated from double logarithmic transforms. Numbers in parentheses are 95% confidence limits for the exponent of Wd. A. A. xanthogrammica. Wp is dry weight (g) of mussel tissue Wp = Wd165, (, ), (N = 481 anemones, 10 size classes, 177 prey) R2 = B. A. elegantissima, Wp is wet weight (mg) of prey calculated from volume estimates, Wp = W , (, ) (N == 112 anemones, 8 size classes, 113 prey) R2 = C. M. senile, Wp is wet weight (mg) of prey calculated from volume estimates, Wp = Wd (, ) (N == 107 anemones, 10 size classes, 538 prey) R2 = For the first seven size classes, Wp = Wd' 16, (, ), R2 = For the last four size classes, Wp = Wd'256, (, ), R2 = in beds adjacent to the anemones on Tatoosh Island (mussel sizes from T. Suchanek, unpublished data). DISCUSSION Sea anemones capture prey by three somewhat distinct methods. First, prey suspended in the water column, usually zooplankton, are intercepted by one or more tentacles and the tentacles transfer prey to the mouth (Sebens, 1976; Purcell, 1977a). Second, sessile prey dislodged by wave action or by foraging predators are washed into the tentacle crown (Dayton, 1973; Sebens and Paine, 1978). Third, motile prey blunder into the anemone's tentacles. Sea urchins (Dayton, 1973; Day- ton et al., 1974; Sebens, 1976), crabs (Sebens and Laakso, 1977), and fishes (Sebens and Laakso, 1977; Hamner and Dunn, 1980) are captured in this third manner. Turbid or turbulent water conditions may facilitate this type of capt
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
