. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PREY CAPTURE BY SEA ANEMONES 83 30 u o td 2 25 o _* o J3 w -a o 20 15 -a oo Small Medium Large. 10 20 30 40 Flow regime (U10, cm s ) Figure 6. Expected metabolic rate as a function of flow regime for the three size classes of Melridium senile, based on mean Reynolds numbers lor the study anemones and empirical mass-transfer relations from Patterson and Sebensl 1989). See text for calculations. balance also depends on local food availability, food quality, and absorption efficiency (, Zamer. 1986), the patterns of potenti
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PREY CAPTURE BY SEA ANEMONES 83 30 u o td 2 25 o _* o J3 w -a o 20 15 -a oo Small Medium Large. 10 20 30 40 Flow regime (U10, cm s ) Figure 6. Expected metabolic rate as a function of flow regime for the three size classes of Melridium senile, based on mean Reynolds numbers lor the study anemones and empirical mass-transfer relations from Patterson and Sebensl 1989). See text for calculations. balance also depends on local food availability, food quality, and absorption efficiency (, Zamer. 1986), the patterns of potential food intake (feeding rate) and expected metabolic cost provide a basis for relative com- parisons of potential flow optima among size classes. The flow speed at which energetic cost counterbalances food intake will be highest for the small anemones, intermedi- ate for medium-sized anemones, and lowest for large anemones. Due to very high feeding rates, small anemo- nes are able to maintain a more positive energy balance than both medium and large anemones at all flow speeds > 10 cm s~'. The almost 10-fold increase in feeding rate of small anemones in the flow range 4-10 cm s~' amply exceeds the concomitant increase in metabolic cost over this flow interval, and is likely to allow rapid growth of juvenile anemones and lacerates in low-to-moderate flow regimes. At higher flow speeds, however, feeding rate remains constant, whereas metabolic rate increases linearly with flow. If the feeding rate of small anemones at 4 cm s~' is sufficient to meet basic energy demands, so is the feeding rate at 44 cm s"1 because both feeding rate and metabolic cost increase 10-fold between lowest and highest flow. At the lowest flow speed, however, large anemones are likely to have a more positive energy bal- ance than the smaller size classes, given the comparable feeding rates of small and large anemones but the lower mass-specific metabolic cost of large anemones. Since large anemones
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
